tag:blogger.com,1999:blog-30865587285719671802024-02-20T16:12:24.310-05:00The 21st Century Digital HomeAnne Barela's posts on electronics, including vintage, modern, and Internet of Things projects.Anne Barelahttp://www.blogger.com/profile/15220828568926183065noreply@blogger.comBlogger179125tag:blogger.com,1999:blog-3086558728571967180.post-23004126980814449022023-03-15T14:30:00.001-04:002023-03-15T14:30:06.570-04:00Restoring an IBM PS/2 Model 55SX<p></p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/a/AVvXsEhAbNScDHeUZkbh5eBtBRjsqc921IQClxhBav4quU6r2RwTuEDjedTeQtlizmoght7LPMS-j2VDl9jU01ug3bP5hQoxMBgk-aLd6EDhuneHOlbG2UfLQwjNjMFZMsJtmJDoZL9jQLamGCBoSIiLCKF4OFKFtxdS9IhOV4BKtId4BWcFsJ-VJW_7mrArrw" style="margin-left: 1em; margin-right: 1em;"><img alt="" data-original-height="2736" data-original-width="3648" height="314" src="https://blogger.googleusercontent.com/img/a/AVvXsEhAbNScDHeUZkbh5eBtBRjsqc921IQClxhBav4quU6r2RwTuEDjedTeQtlizmoght7LPMS-j2VDl9jU01ug3bP5hQoxMBgk-aLd6EDhuneHOlbG2UfLQwjNjMFZMsJtmJDoZL9jQLamGCBoSIiLCKF4OFKFtxdS9IhOV4BKtId4BWcFsJ-VJW_7mrArrw=w418-h314" width="418" /></a></div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;"><br /></div> <div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/a/AVvXsEjhcep63xr-J1TAHBZ24_X0U-rrCGrPlQTPzi30UT1S7PkaGxXXXuRoDPhlazkC1pbMNbddeWBuwW1_LeuWIHcNCwFRshEWKIpjEf8e5ezZ_MbFaChTNYn_S8JrdGvH4-o_xYLzOBo1qe7V2IdnnCIYoNYLomklvXUplDZ8hO0efwmmUlbOWHUfXhi91Q" style="margin-left: 1em; margin-right: 1em;"><img alt="" data-original-height="2250" data-original-width="2252" height="332" src="https://blogger.googleusercontent.com/img/a/AVvXsEjhcep63xr-J1TAHBZ24_X0U-rrCGrPlQTPzi30UT1S7PkaGxXXXuRoDPhlazkC1pbMNbddeWBuwW1_LeuWIHcNCwFRshEWKIpjEf8e5ezZ_MbFaChTNYn_S8JrdGvH4-o_xYLzOBo1qe7V2IdnnCIYoNYLomklvXUplDZ8hO0efwmmUlbOWHUfXhi91Q=w332-h332" width="332" /></a></div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: left;"><br /></div>Tackling this IBM PS/2 Model 55SX next. Learning about reviving Microchannel Architecture machines.<p></p>Anne Barelahttp://www.blogger.com/profile/15220828568926183065noreply@blogger.com0tag:blogger.com,1999:blog-3086558728571967180.post-40192431706413008082023-02-05T15:02:00.000-05:002023-02-05T15:02:28.255-05:00Vintage HP Disc Memory Division T-Shirt 1983<p> </p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjmCimtqY88xUijQ7wopK9bXzJ0Y9ZEqnvjIwSqpsP9DrshsKq6QAKVvi6mA0USERpuqbEIFcGKR3r_RU-IlaQjhE7_P7kYuZYHa2vgKOyMCEcypGz_W0q4gTsrIwO3Ba9rzzNvzew-1J7-4qeyGSxhq7x4XhWggOQiW_wgUiqL4jxtW9rERo3O-7jxXQ/s4529/2023-02-05%20HP%20Shirt%20BFD.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="2279" data-original-width="4529" height="322" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjmCimtqY88xUijQ7wopK9bXzJ0Y9ZEqnvjIwSqpsP9DrshsKq6QAKVvi6mA0USERpuqbEIFcGKR3r_RU-IlaQjhE7_P7kYuZYHa2vgKOyMCEcypGz_W0q4gTsrIwO3Ba9rzzNvzew-1J7-4qeyGSxhq7x4XhWggOQiW_wgUiqL4jxtW9rERo3O-7jxXQ/w640-h322/2023-02-05%20HP%20Shirt%20BFD.jpg" width="640" /></a></div><br /><p></p><p>I worked for the <a href="http://hpmuseum.net/divisions.php?did=16" target="_blank">HP Disc Memory Division</a> in Boise Idaho, during the summers of 1981, '82, and '83. It gave me the money to almost afford to go to Whitman College prior to attending Caltech the following two years under a 3-2 Engineering Program.</p><p></p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/a/AVvXsEiaFjEG2dgvPB3nFUAjBhfcFnU97dVTuHvr1AMDNC3D1UvB1K_tdp8Sxphj_n1aXCeM4-5bzOrZFktdVROCqw5DBhtAq65sTvFDssoyI7OQkZR6wPATAAtrRZZwZmfSCEVStLy3IkiDMN6KjGxuOl6rz8LDPLLtiyVq6Si4Tte1CeMHyENJu0wEjIm-Eg" style="margin-left: 1em; margin-right: 1em;"><img alt="HP7935" data-original-height="560" data-original-width="574" height="312" src="https://blogger.googleusercontent.com/img/a/AVvXsEiaFjEG2dgvPB3nFUAjBhfcFnU97dVTuHvr1AMDNC3D1UvB1K_tdp8Sxphj_n1aXCeM4-5bzOrZFktdVROCqw5DBhtAq65sTvFDssoyI7OQkZR6wPATAAtrRZZwZmfSCEVStLy3IkiDMN6KjGxuOl6rz8LDPLLtiyVq6Si4Tte1CeMHyENJu0wEjIm-Eg=w320-h312" title="HP7935" width="320" /></a></div><br />In 1981, I worked with a microscope 8 hours a day soldering wires on disc heads. In '82 & '83, I worked on the <a href="https://en.wikipedia.org/wiki/HP_7935" target="_blank">HP 7933/7935 disc drive</a> (Wikipedia) assembly line. I did multiple jobs, wherever they needed me: installing blower motors, making the assembly the disc packs went in ("the tub"). The units were the size of a small dishwasher. And they were finicky to make. They had 7 platters, 14 heads, so a lot could go wrong. When they failed burn-in testing, they'd be sent back to change out a possible defective part. It kept us very busy! <p></p><p>I think the shirt above is my only one to survive to this day. It has the HP logo on the front. On back it has a person holding up a barbell with words depicting issues encountered. The text says "B.F.D. does it under pressure". BFD referred to the unofficial name HP gave the HP7933/35 units: "Big F'in Drive". At 404MB, it was much larger than previous units (the <a href="http://hpmuseum.net/display_item.php?hw=272" target="_blank">HP7920</a> had 50MB).</p><p>If anyone is interested in this piece of Hewlett-Packard history, contact me on Twitter <a href="https://twitter.com/anne_engineer" target="_blank">@anne_engineer</a> or Mastodon @anneb@octodon.social. </p>Anne Barelahttp://www.blogger.com/profile/15220828568926183065noreply@blogger.com0tag:blogger.com,1999:blog-3086558728571967180.post-112849712040884592023-02-05T13:44:00.000-05:002023-02-05T13:44:05.648-05:00IBM 5170 PC/AT Upgrades<p> </p><div class="separator" style="clear: both; text-align: center;"><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhz8Ql4qOCDaEzykNUatX3cwxvNoG8A6rQ1-qobgtEoWJdRx4vGh4LMa-h6BqTFLQtOZLXoMiaPFw2afYr5bcjlCmlX6RaYTAw2M0ec2zSHnS9JAPCet4_0XzQzmpoB1HXy2DYp3bRpb2vqiwFjCUOkn0U1lV4d9iL_wiFl9GTXA5nYsY9pgphYMh-PAg/s2048/2023-02-05%20Upgraded%20AT.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="2048" data-original-width="1736" height="640" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhz8Ql4qOCDaEzykNUatX3cwxvNoG8A6rQ1-qobgtEoWJdRx4vGh4LMa-h6BqTFLQtOZLXoMiaPFw2afYr5bcjlCmlX6RaYTAw2M0ec2zSHnS9JAPCet4_0XzQzmpoB1HXy2DYp3bRpb2vqiwFjCUOkn0U1lV4d9iL_wiFl9GTXA5nYsY9pgphYMh-PAg/w542-h640/2023-02-05%20Upgraded%20AT.png" width="542" /></a></div><div class="separator" style="clear: both; text-align: center;"><br /></div><br /><div class="separator" style="clear: both; text-align: center;"><br /></div><div style="text-align: left;">For the last few days, I set aside the IBM 5160 PC/XT and put the 5170 PC/AT back onto the bench. I got another AST Advantage! card with 2MB on it. I also got the IBM Model M with silver badge and status indicator LEDs as a permanent match to this PC.</div><div style="text-align: left;"><br /></div><div style="text-align: left;">I added one row of 256 megabit chips from another AST card to the newly acquired one and put it in. It has the daughtercard in the picture above. The remaining Advantage card has 256K on it and it's bolstering the machine at present but hogging a 16 bit slot.</div><div style="text-align: left;"><br /></div><div style="text-align: left;">I moved some cards around. The IDE hard drive controller is at the far left with a CompactFlash card with lots of software on it. I tried to use a new bracket mounted CF card holder but it didn't want to play. I swapped the modern produced 8-bit Ethernet card for a vintage 3COM 509B 16-bit model I found in my storage unit. With that, only one 8-bit slot remains. I found a Vortex2 2500 card in storage too, and that might replace the least-used memory expansion card.</div><div style="text-align: left;"><br /></div><div style="text-align: left;">Networking isn't working yet, I'll look to do that later when I get a wired network up and running (I have plans there).</div><div style="text-align: left;"><br /></div><div style="text-align: left;">With things sorted well to this point, I'll button it up again and resume with the IBM PC/XT.</div><br /><br /></div><br /><p></p>Anne Barelahttp://www.blogger.com/profile/15220828568926183065noreply@blogger.com0tag:blogger.com,1999:blog-3086558728571967180.post-71760763830687092472023-01-10T20:34:00.003-05:002023-01-10T20:34:43.050-05:00Buying an Old IBM PC or Compatible on eBay or in Person - tips<div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjrL2dFhWLyCgQq3MwEsAxc-ezRVXGusVfrKbDzy0It6Y8dM25L-7RahU5_985p1rme2IxJvkUHg95AzqNUDxZNJXjWtpWpFAA1D0Wwk6GC607uv-hGaney8YTU0VAzu12F_IY13fKUXv5Q8xUrdbP_H5Kn7F9IOmqD_JObvsxuw_015zaUFBOGfzwIeQ/s1600/front.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1200" data-original-width="1600" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjrL2dFhWLyCgQq3MwEsAxc-ezRVXGusVfrKbDzy0It6Y8dM25L-7RahU5_985p1rme2IxJvkUHg95AzqNUDxZNJXjWtpWpFAA1D0Wwk6GC607uv-hGaney8YTU0VAzu12F_IY13fKUXv5Q8xUrdbP_H5Kn7F9IOmqD_JObvsxuw_015zaUFBOGfzwIeQ/s320/front.jpg" width="320" /></a></div><br /><p>Buying old computers is always a bit of a gamble, as is buying used items made so long ago. As long as you go into buying mode with the expectation that things may go well or not so well, you'll be best prepared for the results.</p><p>So you browse eBay or Craigslist, or go to a boot sale or Ham swap meet. There is an old IBM or compatible computer you're interested in. Here are some tips that may help you in the buying evaluation process.</p><p>1. <b>Is it running? </b>- Likely "no way to test" as few rarely have all the parts, period correct display, etc. Here is a list of running conditions:</p><p></p><ul style="text-align: left;"><li>No power applied</li><li>Powered up, fan spins on power supply</li><li>Computer beeps on power up</li><li>Hard disk and/or floppy sounds</li><li>Some display says it "boots" to BASIC</li><li>Some display says it shows errors or boots MS or PC-DOS</li></ul><p></p><p>Each level down is better than the last. If there is a hard disk and it boots to DOS, that's best. Boots from floppy second, and so on. This gives you confidence in the motherboard, power supply, disk controllers, etc. More confidence in working hardware = more valuable (to you - always keep this info to yourself).</p><p>2. <b>Exterior Visual Inspection</b> - Why is this #2? Because #1 provides more information at first inspection.</p><p>Look at the pictures, or if you're lucky in person. Case condition counts - are there screws holding things, items loose, accessories if any.</p><p>Important: Look at the rear panel. See what add-in cards you can see from the outside. It's a really good indicator of what comes with the machine. And sellers most often have no clue and don't price up with "good cards" inside, full memory, or a coprocessor. This is the first IBM PC/AT I bought. The price was good and I was intrigued at the cards:</p><p></p><div class="separator" style="clear: both; text-align: center;"><div class="separator" style="clear: both; text-align: center;"><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgVgOPFS9O3MfQXviYbwYB3lJ6IxC15zhJhb3vslnxVP5zxnSLHlzt14B9gsEQW9UL764wRgGwqA04Qi15cDPBYULJwkJCawni9CkAROKbZJso2TBg4l6RetQXeUWd8Z2pEitZp8OTQXZrS7BayQEcf9vWUL-TsTfTxQHgJQxGjVXwWwj1BNijbFODUtg/s1600/ebay%20back%20top.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1200" data-original-width="1600" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgVgOPFS9O3MfQXviYbwYB3lJ6IxC15zhJhb3vslnxVP5zxnSLHlzt14B9gsEQW9UL764wRgGwqA04Qi15cDPBYULJwkJCawni9CkAROKbZJso2TBg4l6RetQXeUWd8Z2pEitZp8OTQXZrS7BayQEcf9vWUL-TsTfTxQHgJQxGjVXwWwj1BNijbFODUtg/s320/ebay%20back%20top.png" width="320" /></a></div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEis7ETmMbjWUNS2-BWiHvUaHMrDv5VEiZtIZJa7RuxUw-DBYvW0PDUQyKu3CcDAy6Sp3myfHpgH5JjSNXP4rB8U7Di_HnDibu7q6EyPnLF8wJI9x9I611VPbNMjyZrKzWtLv6_bOgfMk2DLs-P2oRvn0mSkQukrzqCzzJmHvbP6z5NHrqgE5wXlIowixw/s1600/ebay%20back.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1200" data-original-width="1600" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEis7ETmMbjWUNS2-BWiHvUaHMrDv5VEiZtIZJa7RuxUw-DBYvW0PDUQyKu3CcDAy6Sp3myfHpgH5JjSNXP4rB8U7Di_HnDibu7q6EyPnLF8wJI9x9I611VPbNMjyZrKzWtLv6_bOgfMk2DLs-P2oRvn0mSkQukrzqCzzJmHvbP6z5NHrqgE5wXlIowixw/s320/ebay%20back.png" width="320" /></a></div><br /><div class="separator" style="clear: both; text-align: left;">The left connectors look like a standard 9-pin serial and parallel port. The far right looks like a display card with parallel port. The second from the left is a 10-Base T network card and the third card could be a display but that would make two. So definitely more than bare bones here. That with two floppy drives had me intrigued. </div><div class="separator" style="clear: both; text-align: left;"><br /></div><div class="separator" style="clear: both; text-align: left;">If you have few ports, that may be a sign the machine is a bit less desirable - the best thing is to get an...</div><div class="separator" style="clear: both; text-align: left;"><br /></div></div></div>3. <b>Interior Inspection</b> - this isn't always possible, try to see inside if at all possible. Many auction listings have interior pictures. <p></p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhAgHCgwg9kr5JgDxNr3scbSvtFhAK39f808CTEWYm0mruFZSodsPnS-DJOyFfyD4U6SU5zUCT1HuSJE6G93eZksqRJyvG_cslDeyvNGq25JiKNHrKot1hkupaQdRVZkwbYVHInqQBYvOXntplaxvW7FBW28E4GpDz6lWuKK0yhVljw-qi7wDZ4gzw5Ig/s1600/Drives.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1200" data-original-width="1600" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhAgHCgwg9kr5JgDxNr3scbSvtFhAK39f808CTEWYm0mruFZSodsPnS-DJOyFfyD4U6SU5zUCT1HuSJE6G93eZksqRJyvG_cslDeyvNGq25JiKNHrKot1hkupaQdRVZkwbYVHInqQBYvOXntplaxvW7FBW28E4GpDz6lWuKK0yhVljw-qi7wDZ4gzw5Ig/s320/Drives.jpg" width="320" /></a></div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiyXVa_lc5UxCcy2u6bVLj-sHErSZKrI0RawsaCJs0pb8rHuwbyXbXfCtF43DyRloTLToveVSnmrkQt-8OId57Xcfo_bLkblJ_0-xNlsXHy0ZZdPzfIXMgpI2A1JjE7I5yUvQ_AP6ufCCswOXEXfqDS_v8OZbCBRAf1ZZt7OKfz31drOJnkelYQNWZaAw/s1600/Inside.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1200" data-original-width="1600" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiyXVa_lc5UxCcy2u6bVLj-sHErSZKrI0RawsaCJs0pb8rHuwbyXbXfCtF43DyRloTLToveVSnmrkQt-8OId57Xcfo_bLkblJ_0-xNlsXHy0ZZdPzfIXMgpI2A1JjE7I5yUvQ_AP6ufCCswOXEXfqDS_v8OZbCBRAf1ZZt7OKfz31drOJnkelYQNWZaAw/s320/Inside.jpg" width="320" /></a></div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgNRkrb4NhdtWWOMvp6cY6YtHUTm0aLkS0VzzlEnFhbXK8yLZu4rgLkqHxAFzMetJo-Xl0tT_KdY5YSYbUDmeXaouXTNa1i3KmWAoh-E1JdjiS9oqyYsZXjS8ERMRjbQLcUGPLj0BQxa-05X4MMO1lIwNlz7nQMwmyjSIqFtahkVArZlgCp422Jw8QUlA/s1600/Memory.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1200" data-original-width="1600" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgNRkrb4NhdtWWOMvp6cY6YtHUTm0aLkS0VzzlEnFhbXK8yLZu4rgLkqHxAFzMetJo-Xl0tT_KdY5YSYbUDmeXaouXTNa1i3KmWAoh-E1JdjiS9oqyYsZXjS8ERMRjbQLcUGPLj0BQxa-05X4MMO1lIwNlz7nQMwmyjSIqFtahkVArZlgCp422Jw8QUlA/s320/Memory.jpg" width="320" /></a></div><br /><p>Here you can see a lot of good info: It's a later model AT from the 512K System board. It has a Seagate ST-225 hard drive, half height, no 80287 coprocessor and lots more interesting card info. The most valuable cards are memory. The cards are, from the left, the floppy/hard drive controller, standard, IBM serial/parallel adapter, common, an IBM 128k memory board (brings memory to 640K, good!) the 10-Base T network card, an IBM Token Ring network adapter, and the far card was a dual board strange beast, which turned out to be a Wyse 700 display card, pricey in the day. </p><p>Wow, this is better than average. The extra memory is the main bonus. Unfortunately the card doesn't hold more than 128k. The network cards are not immediately useful and the rare display card not immediately useful either (but commands $90 to $150 on eBay).</p><p>So the inspection lets you know how much bang for the buck you get. Add this to the info in previous steps.</p><p><b>NOTE: Unless it boots with hard drive access via a display, never assume the hard drive works.</b> Most often they have died due to age or transit. The red light might come on, it doesn't count really. This is not a huge deal breaker as there are solutions to use memory cards holding much more instead. But a working hard drive is excellent, one with application software more so. Floppies can also not be working with dirty and/or misaligned heads. This is all about 40 year old hardware.</p><p>4. <b>Cleanliness</b> - if it's cleaner than not, that's great. Also if it doesn't smell like cigarette smoke or says "smoke free environment" that's good too. I had one machine that had an old insect infestation, yuck.</p><p></p><h2 style="text-align: left;">Ready to Decide</h2>Ok, based on the information you have, you then need to decide if you want it. You don't want to show much emotion to the seller. Of there is a process to offer a price, you can start lower than their price. Then again, if you see lots you like, you might just want to pay their price, if reasonable. <p></p><p>Know that you'll need a keyboard, display, cabling often to be able to check it out, those all cost extra, usually from other buyers. Factor that into your budget. I usually look to buy a used VGA card and hook it to a more modern LCD display with VGA connection. Keyboards can be very expensive especially for genuine IBM, but some knock-offs can be reasonable. On this machine, I got the seller to throw one in for free.</p><p>Then you use the methods for haggling and buying familiar to most people. Don't like it, don't buy it. If you find some utility, look to pay what is useful to you, which may be less than they want. If they want too much, there are likely others out there. If you see something rare about the machine, factor that into your price.</p><p>Usually there is enough stock on the market to have a pick. At the time this is being written, a drought on IBM PC/AT machines appears over and they are selling for around $300 US just the system unit. But not all machines are the same, hence the review. Also price rises depending on #1 - if it's running. Don't expect a $300 machine that boots to DOS 6.22 with a ton of software and memory. If you can find one, it's a true bargain.</p><h2 style="text-align: left;">Shipping</h2><p>Buying in person saves money. Unfortunately these computers are heavy and shipping can be costly. If an auction says shipping free (or at a low cost), factor that as a positive. If shipping is too much, you might want to pass. And likely if the hard drives with my two PC/ATs ever worked, the harsh shipping that likely ensued trashed them. </p><p>The buyer could park the drive heads or pack the drive in a secure box but that would be very rare and command more money as most will not do such.</p><h2 style="text-align: left;">Good Luck</h2><div>The chance can be fun and can be frustrated. I ended up getting a second AT that had some different features than the first and the parts complement each other - like a 1.44MB floppy, an extended memory card with 128K and room for more, a coprocessor, a clock/port card. So I could use all the best parts for my build. But the hard drives in both machines failed, different reasons. And the floppies had some issues.</div><div><br /></div><div>I hope you find some satisfaction in the hunt and digging into your finds.</div><p>From <a href="http://minuszero.net">minuszero.net</a> - some tips on language used on auction sites:</p><blockquote><p><span class="styPageType1_heading_L3" style="font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 13px; font-weight: bold;">"Extremely rare"</span><br style="font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 12px;" /><br style="font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 12px;" /><span style="background-color: #cacecb; font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 12px;">Example: I would list one of my toenail clippings as extremely rare, because only my clippings contain my DNA.</span><br style="font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 12px;" /><br style="font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 12px;" /><span class="styPageType1_heading_L3" style="font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 13px; font-weight: bold;">"Includes a certificate of authenticity"</span><br style="font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 12px;" /><br style="font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 12px;" /><span style="background-color: #cacecb; font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 12px;">Useful for proving the authenticity of an item that you are selling.</span><br style="font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 12px;" /><span style="background-color: #cacecb; font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 12px;">For example, I provide a Certificate of Authenticity with every "Genuine Loch Ness Monster's Tooth" that I sell.</span><br style="font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 12px;" /><br style="font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 12px;" /><span class="styPageType1_heading_L3" style="font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 13px; font-weight: bold;">"Pulled from a working system"</span><br style="font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 12px;" /><br style="font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 12px;" /><span style="background-color: #cacecb; font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 12px;">working = I turned the system on, and I either heard the power supply fan turning, or I saw a light somewhere turn on. No smoke was evident.</span><br style="font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 12px;" /><br style="font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 12px;" /><span class="styPageType1_heading_L3" style="font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 13px; font-weight: bold;">"It was working the last time I powered it on"</span><br style="font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 12px;" /><br style="font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 12px;" /></p><table style="border-collapse: collapse; color: black; font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 12px;"><tbody><tr><td style="vertical-align: top; width: 100px;">Meaning #1:</td><td style="width: 1500px;">It does not work now. I will say that it it worked the last time I powered it on. When the buyer complains, I will say that it was working 5 years ago, and must have deteriorated in that time.</td></tr><tr><td style="vertical-align: top;"> </td><td> </td></tr><tr><td style="vertical-align: top;">Meaning #2:</td><td>I have no idea how to tell if it is working or not. But, I think there's a good chance that it is working. I do not want to list it as untested because that will put a lot of people off. I will list it as, "<span style="font-style: italic;">It was working the last time I powered it on</span>", and take my chances.</td></tr></tbody></table></blockquote>Anne Barelahttp://www.blogger.com/profile/15220828568926183065noreply@blogger.com0tag:blogger.com,1999:blog-3086558728571967180.post-91844629073401908252023-01-08T18:15:00.001-05:002023-01-08T18:50:41.827-05:00Upgrading the IBM PC/AT to MS-DOS 6.22 and Windows 3.1<p> You read this correctly. What a software upgrade. My floppies for Windows/286 seem damaged. so...</p><h2>Going from MS-DOS 5 to MS-DOS 6.22</h2><p>Once I got the 1.44M floppy recognized, the 1.44MB MS-DOS 6.22 upgrade diskettes read correctly and the install process ran fine. DOS 6.22 takes up more memory but has some nice utilities and is the most state of the art version (to my knowledge).</p><p></p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/a/AVvXsEiMYtDegCPZh0Pw0f_Lu2d0FQKzlXkEFXaugHS9S-EcRTDqCxcyD1FzYixhaF3zYQUdpLKY__A579myD_T15oXd9myldqWQ6A088fJgUxjCCzVXviAqDnPgWdsOorESF9Nu-8fg2ebGRHvqoOqNmXV9nAOAsXGUIAHoybmS920cLcHT8XIMbKN5HF5A0Q" style="margin-left: 1em; margin-right: 1em;"><img alt="" data-original-height="360" data-original-width="639" height="180" src="https://blogger.googleusercontent.com/img/a/AVvXsEiMYtDegCPZh0Pw0f_Lu2d0FQKzlXkEFXaugHS9S-EcRTDqCxcyD1FzYixhaF3zYQUdpLKY__A579myD_T15oXd9myldqWQ6A088fJgUxjCCzVXviAqDnPgWdsOorESF9Nu-8fg2ebGRHvqoOqNmXV9nAOAsXGUIAHoybmS920cLcHT8XIMbKN5HF5A0Q" width="320" /></a></div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: left;">It's a matter of feeding three floppies to upgrade. It's kinda touchy - it really wants things just right to upgrade the DOS and you cannot use the upgrade floppies for a new install (unless there is a trick I'm unaware of). It saves the old MS-DOS in a hard disk directory folder called OLD_DOS.1 in case you need things or decide to uninstall. Speaking of uninstall, all the MS-DOS upgrades want "Uninstall Floppies", usually one or maybe two to undo the upgrade. Just a PITA in my book.</div><div class="separator" style="clear: both; text-align: left;"><br /></div><div class="separator" style="clear: both; text-align: left;">Looking in my floppy collection, I found Windows/286. But the disks appear to be damaged.</div><div class="separator" style="clear: both; text-align: left;"><br /></div><div class="separator" style="clear: both; text-align: left;">I was wondering what to do so...</div><div class="separator" style="clear: both; text-align: left;"><br /></div><h2 style="clear: both; text-align: left;">Installing Windows 3.1 on an IBM PC/AT</h2><div class="separator" style="clear: both; text-align: left;">I have install 1.44MB 3.5" floppies for Windows 3.1 and Windows for Workgroups 3.11. If I remember correctly WfW wants an 80386. So I grabbed the Windows 3.1 diskettes. It talked about a mouse - lucky I got that ATI VGA Ultra card with in-port mouse built in. My 1080 VGA/DVI monitor did not like 640x400 mode so I borrowed the VGA LCD monitor from the Gateway Pentium III machine.</div><div class="separator" style="clear: both; text-align: left;"><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/a/AVvXsEjUpL18m1mJwb1OgVAf1slvRahEcGbpUOd1zbnLhnk2S0c0_0KQggh9gVljICOhzWiE0OgNfk-iTprXkyL8xH4D490SeR99CEwmWqqy44SMJNJif3n8iZ8QUBpwO8DR3Z_9AJue4G8unb9kX3LvQA7dxuGYpzuErTjA5CLt8szKOO1Pnk_jTIS1JA5oBQ" style="margin-left: 1em; margin-right: 1em;"><img alt="" data-original-height="2252" data-original-width="4000" height="180" src="https://blogger.googleusercontent.com/img/a/AVvXsEjUpL18m1mJwb1OgVAf1slvRahEcGbpUOd1zbnLhnk2S0c0_0KQggh9gVljICOhzWiE0OgNfk-iTprXkyL8xH4D490SeR99CEwmWqqy44SMJNJif3n8iZ8QUBpwO8DR3Z_9AJue4G8unb9kX3LvQA7dxuGYpzuErTjA5CLt8szKOO1Pnk_jTIS1JA5oBQ" width="320" /></a></div><div class="separator" style="clear: both; text-align: left;"><br /></div><div class="separator" style="clear: both; text-align: left;">6 diskettes (119 files) later, I get the Windows 3.1 splash screen. </div><div class="separator" style="clear: both; text-align: left;"><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/a/AVvXsEjMVZRv-Y1xn8Bgbi0gbjbbuxutMEo8xQRqD9u2jZCNBOGStuo65oCMkWgZDCyv2E_Ctz-hPa4vpf0bcLnd3VI6Yo1E_tTqGZzrrdHFk4ysnD1Gks0vFqfGB1li7RqenJ11i2egXyI6jXz3-FldvW-xjHFj7HRWQhCl6147S-wVBJTUJtWwBPTgTddq9w" style="margin-left: 1em; margin-right: 1em;"><img alt="" data-original-height="480" data-original-width="640" height="240" src="https://blogger.googleusercontent.com/img/a/AVvXsEjMVZRv-Y1xn8Bgbi0gbjbbuxutMEo8xQRqD9u2jZCNBOGStuo65oCMkWgZDCyv2E_Ctz-hPa4vpf0bcLnd3VI6Yo1E_tTqGZzrrdHFk4ysnD1Gks0vFqfGB1li7RqenJ11i2egXyI6jXz3-FldvW-xjHFj7HRWQhCl6147S-wVBJTUJtWwBPTgTddq9w" width="320" /></a></div><div class="separator" style="clear: both; text-align: left;"><br /></div><div class="separator" style="clear: both; text-align: left;">The display is canted to the right. I want to adjust the screen resolution, if possible but I need to Google for that, my memory is not so clear on that and drivers doesn't seem to do display drivers to my knowledge.</div><br /><br /></div><br /><br /><p></p>Anne Barelahttp://www.blogger.com/profile/15220828568926183065noreply@blogger.com0tag:blogger.com,1999:blog-3086558728571967180.post-6741048406290123552023-01-08T17:51:00.000-05:002023-01-08T17:51:03.351-05:00 Getting the IBM PC/AT to Recognize a 1.44MB Hard Disk<p>Lots of time this week getting my IBM PC/AT up to speed. Here's a synopsis:</p><h2 style="text-align: left;">Getting a New Compact Flash Hard Drive</h2><p>Instead of the XT-IDE Compact Flash hard disk adapter, I switched it for a modern XT-IDE Rev 4 IDE controller card and an IDE to Compact Flash adapter. This way I can use a spinning IDE adapter or whatever later and use the old adapter in an XT machine. Much fiddling with jumpers and it worked. Same shenanigans getting it to be bootable. My latest trick is boot to DOS 3.1 then upgrade to DOS 5. That seems to work well. I now have a 128MB Compact Flash SSD working in the AT.</p><h2 style="text-align: left;">Getting the Sony 1.44MB 3.5 inch disk drive working</h2><p>Even though my machine is the latest revision of the PC/AT made, with a BIOS dated 11/15/1985, the IBM Diagnostics Diskette (version 2.03) setup only has 360k, 1.2M and 720k floppy drive options. The BIOS does have code for 1.44M 3.5" drives. But how to set that? I went back to <a href="https://www.minuszerodegrees.net/5170/setup/5170_gsetup.htm">minuszerodegrees.net</a> here and there is a third party program called <a href="https://www.minuszerodegrees.net/software/GSETUP.ZIP">GSETUP.EXE</a> that can set the right drive type. Yay!</p><p>I just needed it on my Compact Flash hard drive. To do so, I used my Tweener Pentium III/500 to read the file off a thumb drive then write it to the Compact Flash card via a USB to Compact Flash card adapter. Yes, this is a lot of hardware for this type of work. I could have copied it to the Compact Flash from my modern desktop but I'm not that smart. It did allow me to copy GSETUP to my MS-DOS 5 boot floppy - likely why I chose that route.</p><p>With GSETUP.EXE, I ran it (no special boot required and indeed I could chose 1.44MB 3.5" drive as a choice for drive B. Then I could read and write high density 3.5" drives like I should. Yay!</p><p>See the next installment for upgrading DOS & more.</p><p><br /></p><p><br /></p>Anne Barelahttp://www.blogger.com/profile/15220828568926183065noreply@blogger.com0tag:blogger.com,1999:blog-3086558728571967180.post-3705236636678538432023-01-03T11:56:00.004-05:002023-01-03T11:56:39.073-05:00Getting a non-functional IBM PC/AT up and running is hard<p> It's been a long time without posts. Maybe I can correct this.</p><p>A couple months ago, I took the plunge and got an IBM PC/AT. I've wanted one for almost 40 years. I have an IBM PC, two PC/XTs, and a 5160 portable. A 5170 is next in line ATs were very hard to get for the last couple years but units are showing up on eBay with various descriptions, usually untested. No keyboard, monitor, cables, etc. So one goes off a few pictures and hopes for the best.</p><p></p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/a/AVvXsEgtneXfGarmrabTN-042G8d_PLr4l2rNsgnVWtcYR7FFXhSGloerK98S5kW2eQa6fTzPcLmesCsTWIBDjPUQTW254PpR2VSFWvSATMP3hgoii9dP_gk6w429cuz3U8tyxhoXKGpz0To8JTA2Q1uNpZAv5PHqFRN-bd-0Az9pgiB5O7Zq0RdcNkGqs7IrA" style="margin-left: 1em; margin-right: 1em;"><img alt="" data-original-height="460" data-original-width="680" height="216" src="https://blogger.googleusercontent.com/img/a/AVvXsEgtneXfGarmrabTN-042G8d_PLr4l2rNsgnVWtcYR7FFXhSGloerK98S5kW2eQa6fTzPcLmesCsTWIBDjPUQTW254PpR2VSFWvSATMP3hgoii9dP_gk6w429cuz3U8tyxhoXKGpz0To8JTA2Q1uNpZAv5PHqFRN-bd-0Az9pgiB5O7Zq0RdcNkGqs7IrA" width="320" /></a></div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: left;">Here is the one I got late 2022. I knew it had two floppies, some type of display card, a hard drive, a memory add-on card and two network cards. The seller threw in a non-IBM (cheapo) keyboard which was great. I got it on the bench and start to look. The Seagate ST-225 drive is unresponsive, it doesn't spin - a bad sign. It has a generic IBM Monochrome card, ok. I splurge for an ATI Ultra ISA VGA card with bus mouse off eBay. That'll allow me to use a VGA flat panel monitor.</div><div class="separator" style="clear: both; text-align: left;"><br /></div><div class="separator" style="clear: both; text-align: left;"><a href="https://blogger.googleusercontent.com/img/a/AVvXsEjSiEMCASgIkAyIwnuWJC3Je94mRQJ9W8mJt3QxtJtgO_rFZIPvO-pSAFvmaOZ1ZDQASZ6vI4VGa5I1KSdLwewRKkOP-lZTp6tZNt7rwjmgBoImzBesSLUZnULaaK0NY1Ln4ghyZbT6sQwtRlXlzKvJAFRPtWgUGePq-uDiLM35w9pB_buwhR460uxHvw" style="margin-left: 1em; margin-right: 1em; text-align: center;"><img alt="" data-original-height="559" data-original-width="678" height="240" src="https://blogger.googleusercontent.com/img/a/AVvXsEjSiEMCASgIkAyIwnuWJC3Je94mRQJ9W8mJt3QxtJtgO_rFZIPvO-pSAFvmaOZ1ZDQASZ6vI4VGa5I1KSdLwewRKkOP-lZTp6tZNt7rwjmgBoImzBesSLUZnULaaK0NY1Ln4ghyZbT6sQwtRlXlzKvJAFRPtWgUGePq-uDiLM35w9pB_buwhR460uxHvw" width="291" /></a></div><div class="separator" style="clear: both; text-align: left;"><br /></div><div class="separator" style="clear: both; text-align: left;"><br /></div><div class="separator" style="clear: both; text-align: left;">I quickly learn that the PC/AT is not like the earlier IBMs. It keeps BIOS configuration information in CMOS rather than via motherboard jumpers. And this memory can only (mostly) be set via a special IBM 5.25" diagnostics floppy disk. If you have this problem, see <a href="https://www.minuszerodegrees.net/5170/setup/5170_setup.htm" target="_blank">this website</a> on how to proceed. I got the disk image and took it to my Pentium III PC and wrote a disk. I did use a 1.2MB drive to write a 360K disk as my 360K drives were misbehaving. It worked, I could set parameters in the AT by booting the diagnostics disk.</div><div class="separator" style="clear: both; text-align: left;"><br /></div><div class="separator" style="clear: both; text-align: left;"><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/a/AVvXsEi8RJesjEmQxeTfz-Z77EJyki9JGbnyWnLtpX_KxJu2ckKa6o3ljszof_sGEEUrhWAf0foN9LmGJZmHeGaQJT_LcmQP0X74Y7G9fa3L598-fNXgXnfTncx19H-isIZb_4CuFn2tBYPtplKLo5J6l-cqFjGd69aMiBt0OxKsmtsFUhXfcShv5S8oLjMFbw" style="margin-left: 1em; margin-right: 1em;"><img alt="" data-original-height="383" data-original-width="680" height="180" src="https://blogger.googleusercontent.com/img/a/AVvXsEi8RJesjEmQxeTfz-Z77EJyki9JGbnyWnLtpX_KxJu2ckKa6o3ljszof_sGEEUrhWAf0foN9LmGJZmHeGaQJT_LcmQP0X74Y7G9fa3L598-fNXgXnfTncx19H-isIZb_4CuFn2tBYPtplKLo5J6l-cqFjGd69aMiBt0OxKsmtsFUhXfcShv5S8oLjMFbw" width="320" /></a></div><br /><br /></div><div class="separator" style="clear: both; text-align: left;">I replace the BIOS memory back up battery (not corroded thank goodness) with an AA battery pack. All good. See <a href="https://www.minuszerodegrees.net/5170/battery/5170_battery.htm" target="_blank">this</a> on the procedure.</div><div class="separator" style="clear: both; text-align: left;"><br /></div><div class="separator" style="clear: both; text-align: left;">With the diagnostics disk, I could finally boot, displaying on the monitor. I learned the AT is a model 339, 512KB memory onboard (not stacked DIP chips). Drive A works, floppy B doesn't (seek errors), and the hard drive is indeed dead.</div><div class="separator" style="clear: both; text-align: left;"><br /></div><div class="separator" style="clear: both; text-align: left;"><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/a/AVvXsEgtPhjrI_yjQQH_M_IEyE1SjoZk-VscqrTHdeuTIqk6yvi3fFBJJz3wP55Z-jDCr9wBUMx43laJCbyz4yHQ7mLsK_YJGOQtbmi4ShdlzA3mHTHgKR2XLcBf-pvPD4v3ltvoElFZ7pyiab2fOHo5C5RoxxOX2jM6gssI9r21okMrGn1erVjIKgaaoWNP0g" style="margin-left: 1em; margin-right: 1em;"><img alt="" data-original-height="1651" data-original-width="2048" height="240" src="https://blogger.googleusercontent.com/img/a/AVvXsEgtPhjrI_yjQQH_M_IEyE1SjoZk-VscqrTHdeuTIqk6yvi3fFBJJz3wP55Z-jDCr9wBUMx43laJCbyz4yHQ7mLsK_YJGOQtbmi4ShdlzA3mHTHgKR2XLcBf-pvPD4v3ltvoElFZ7pyiab2fOHo5C5RoxxOX2jM6gssI9r21okMrGn1erVjIKgaaoWNP0g" width="298" /></a></div><br /><br /></div>Here are the add-in cards (besides the floppy/hard disk card not shown). From the top, an IBM monochrome adapter (plus serial/parallel), 10-base-T network card, Serial/parallel card, and an interesting IBM Token Ring network card. None immediately needed to debug/use the machine but I'm not complaining. <p></p><p>I get an XT-IDE ISA to compact flash card and put in a 16MB CF card. I had issues with that until I used the XT CD-ROM in the Pentium III to mark the drive via FDISK /MBR. Then I could format the drive and I loaded PCDOS 2. I upgraded it via floppy to MS-DOS 5.0. There are a slew of XT-IDE cards out there and some don't play nice with the AT without clone ROMs which would be a huge headache. So I'm glad the one I have played ok.</p><p>Meanwhile, I didn't turn my alert off on eBay and another IBM PC/AT machine popped up at a good price. Amy bought it for me for a birthday present. It has parts that complement the PC above. I'll dive into that one in the next post.<br /><br /></p><p><br /></p>Anne Barelahttp://www.blogger.com/profile/15220828568926183065noreply@blogger.com0Florida, USA27.6648274 -81.5157535-0.64540643617884541 -116.6720035 55.975061236178846 -46.3595035tag:blogger.com,1999:blog-3086558728571967180.post-15256441232893193942019-02-17T14:41:00.000-05:002019-02-17T14:41:14.713-05:00Using EGA and VGA video cards in IBM 5150 PC, 5155 Portable, and 5160 PC/XT Machines<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg4zz1_jEv34aRhILfFRHHu1DQJIlfO-opThvFk2WiQk6TO8HDjBvR5LDFBeaxPCavN-E-FJ1b9Atzx-Jp7nYuc0cT24iGyEvSN6gDYXsTOsM5XOGR5iJBizK2fFb5ZA0pOdlz_Omglzbc/s1600/20190116_165853.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1600" data-original-width="1200" height="640" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg4zz1_jEv34aRhILfFRHHu1DQJIlfO-opThvFk2WiQk6TO8HDjBvR5LDFBeaxPCavN-E-FJ1b9Atzx-Jp7nYuc0cT24iGyEvSN6gDYXsTOsM5XOGR5iJBizK2fFb5ZA0pOdlz_Omglzbc/s640/20190116_165853.jpg" width="480" /></a></div>
<br />
I first ran into video card issues debugging the IBM 5155 Portable computer. Besides no video it beeped one long, two short on startup. I did a lot of video card switch and jumper gymnastics to try to get that straight when I should have done more digging online. Two switches on the motherboard would have probably done the trick.<br />
<br />
So I have compiled a short primer on using EGA and VGA displays on these machines. Most of the info is from various pages of the excellent <a href="http://minuszerodegrees.net/">minuszerodegrees.net</a> site but in multiple places. Hopefully having this in one place helps others.<br />
<br />
<b>Do note:</b> there are alot of caveats in this and not all cards will work in all computers. One reason I don't make a compatibility table (yet) is others have done so and it gets expensive testing.<br />
<br />
<br />
<div class="MsoNormal">
<span style="font-family: "Arial","sans-serif"; font-size: 13.0pt;"><b>Motherboard
switch settings for EGA and VGA (BIOS-containing) Video Cards</b></span></div>
<div class="MsoNormal">
<span style="font-family: "Arial","sans-serif"; mso-bidi-font-size: 13.0pt;"><b>Version 1.00</b></span><span style="font-family: "Arial","sans-serif"; font-size: 13.0pt;"><o:p></o:p></span></div>
<div class="MsoNormal">
<br /></div>
<div class="MsoNormal">
<br /></div>
<div class="MsoNormal">
<span style="font-family: "Arial","sans-serif"; font-size: 14.0pt; mso-bidi-font-size: 11.0pt;"><b>IBM 5150 PC</b><o:p></o:p></span></div>
<div class="MsoNormal">
<br /></div>
<div class="MsoListParagraphCxSpFirst" style="mso-list: l2 level1 lfo1; text-indent: -.25in;">
<!--[if !supportLists]--><span style="font-family: Symbol; mso-bidi-font-family: Symbol; mso-fareast-font-family: Symbol;"><span style="mso-list: Ignore;">·<span style="font: 7.0pt "Times New Roman";">
</span></span></span><!--[endif]--><span style="font-family: "Arial","sans-serif";">The
IBM 5150's motherboard must have the third BIOS revision, 10/27/82, for EGA/VGA<o:p></o:p></span></div>
<div class="MsoListParagraphCxSpMiddle" style="margin-left: 1.0in; mso-add-space: auto; mso-list: l2 level2 lfo1; text-indent: -.25in;">
<!--[if !supportLists]--><span style="font-family: Courier New;">o</span><span style="font: 7pt "Times New Roman";"> </span><span style="font-stretch: normal; font-style: normal; font-variant: normal; font-weight: normal; line-height: normal;"><span style="font-family: Arial, Helvetica, sans-serif;">The ROM ha</span></span><span style="font-family: "Arial","sans-serif";">s
the IBM part number of "1501476" printed on it.<o:p></o:p></span></div>
<div class="MsoListParagraphCxSpMiddle" style="margin-left: 1.0in; mso-add-space: auto; mso-list: l2 level2 lfo1; text-indent: -.25in;">
<!--[if !supportLists]--><span style="font-family: "Courier New"; mso-fareast-font-family: "Courier New";"><span style="mso-list: Ignore;">o<span style="font: 7.0pt "Times New Roman";">
</span></span></span><!--[endif]--><span style="font-family: "Arial","sans-serif";">On
the 5150 motherboard, the ROM in socket U33 contains the BIOS.<o:p></o:p></span></div>
<div class="MsoListParagraphCxSpMiddle" style="margin-left: 1.0in; mso-add-space: auto; mso-list: l2 level2 lfo1; text-indent: -.25in;">
<!--[if !supportLists]--><span style="font-family: "Courier New"; mso-fareast-font-family: "Courier New";"><span style="mso-list: Ignore;">o<span style="font: 7.0pt "Times New Roman";">
</span></span></span><!--[endif]--><span style="font-family: "Arial","sans-serif";">Due
to <a href="http://minuszerodegrees.net/5150/misc/5150_27OCT82_less_than_4_ram_banks.htm">bugs</a>,
this BIOS requires that all 4 banks of motherboard RAM be populated.<o:p></o:p></span></div>
<div class="MsoListParagraphCxSpMiddle" style="mso-list: l2 level1 lfo1; text-indent: -.25in;">
<!--[if !supportLists]--><span style="font-family: Symbol; mso-bidi-font-family: Symbol; mso-fareast-font-family: Symbol;"><span style="mso-list: Ignore;">·<span style="font: 7.0pt "Times New Roman";">
</span></span></span><!--[endif]--><span style="font-family: "Arial","sans-serif";">The
two video switches on SW1 (shown below) must be set for:<span style="mso-spacerun: yes;"> </span>5=ON, 6=ON<o:p></o:p></span></div>
<div class="MsoListParagraphCxSpMiddle" style="mso-list: l2 level1 lfo1; text-indent: -.25in;">
<span style="font-family: "Arial","sans-serif";"><br /></span></div>
<div class="MsoListParagraphCxSpMiddle" style="mso-list: l2 level1 lfo1; text-indent: -.25in;">
<!--[if !supportLists]--><span style="font-family: Symbol; mso-bidi-font-family: Symbol; mso-fareast-font-family: Symbol;"><span style="mso-list: Ignore;">·<span style="font: 7.0pt "Times New Roman";">
</span></span></span><!--[endif]--><span style="font-family: "Arial","sans-serif";">Of
SW1 and SW2, <b style="mso-bidi-font-weight: normal;">SW1 is the switch block
closest to the center of the motherboard</b>.<br />
These settings apply to both the '<a href="http://minuszerodegrees.net/5150/misc/5150_label_16kb_64kb_cpu.jpg">16KB-64KB</a>'
and '<a href="http://minuszerodegrees.net/5150/misc/5150_label_64kb_256kb_cpu.jpg">64KB-256KB</a>'
versions of the 5150 motherboard.<o:p></o:p></span></div>
<div class="MsoListParagraphCxSpMiddle" style="mso-list: l2 level1 lfo1; text-indent: -.25in;">
<span style="font-family: "Arial","sans-serif";"><br /></span></div>
<div class="MsoListParagraphCxSpMiddle" style="mso-list: l2 level1 lfo1; text-indent: -.25in;">
<!--[if !supportLists]--><span style="font-family: Symbol; mso-bidi-font-family: Symbol; mso-fareast-font-family: Symbol;"><span style="mso-list: Ignore;">·<span style="font: 7.0pt "Times New Roman";">
</span></span></span><!--[endif]--><span style="font-family: "Arial","sans-serif";">If
your IBM 5150 contains an XT-class hard disk controller, then be aware that
some VGA cards may have a <a href="http://minuszerodegrees.net/misc/resource_conflict.png">resource conflict</a> with
it.<o:p></o:p></span></div>
<div class="MsoListParagraphCxSpMiddle" style="mso-list: l2 level1 lfo1; text-indent: -.25in;">
<span style="font-family: "Arial","sans-serif";"><br /></span></div>
<div class="MsoListParagraphCxSpLast" style="mso-list: l2 level1 lfo1; text-indent: -.25in;">
<!--[if !supportLists]--><span style="font-family: Symbol; mso-bidi-font-family: Symbol; mso-fareast-font-family: Symbol;"><span style="mso-list: Ignore;">·<span style="font: 7.0pt "Times New Roman";">
</span></span></span><!--[endif]--><span style="font-family: "Arial","sans-serif";">Known
working VGA card lists: <a href="http://minuszerodegrees.net/5150/vga/5150_vga.htm">minuszerodegrees</a>, <a href="http://www.vcfed.org/forum/showthread.php?26432-8bit-Friendly-ISA-VGA-cards">vcf</a><o:p></o:p></span></div>
<div class="MsoNormal">
<br /></div>
<div align="center" class="MsoNormal" style="text-align: center;">
<!--[if gte vml 1]><v:shapetype
id="_x0000_t202" coordsize="21600,21600" o:spt="202" path="m,l,21600r21600,l21600,xe">
<v:stroke joinstyle="miter"/>
<v:path gradientshapeok="t" o:connecttype="rect"/>
</v:shapetype><v:shape id="Text_x0020_Box_x0020_4" o:spid="_x0000_s1028"
type="#_x0000_t202" style='position:absolute;left:0;text-align:left;
margin-left:366.5pt;margin-top:11.65pt;width:127pt;height:39.5pt;z-index:251661312;
visibility:visible;mso-wrap-style:square;mso-width-percent:0;
mso-height-percent:0;mso-wrap-distance-left:9pt;mso-wrap-distance-top:0;
mso-wrap-distance-right:9pt;mso-wrap-distance-bottom:0;
mso-position-horizontal:absolute;mso-position-horizontal-relative:text;
mso-position-vertical:absolute;mso-position-vertical-relative:text;
mso-width-percent:0;mso-height-percent:0;mso-width-relative:margin;
mso-height-relative:margin;v-text-anchor:top' o:gfxdata="UEsDBBQABgAIAAAAIQC75UiUBQEAAB4CAAATAAAAW0NvbnRlbnRfVHlwZXNdLnhtbKSRvU7DMBSF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" fillcolor="white [3201]" strokeweight=".5pt">
<v:textbox>
<![if !mso]>
<table cellpadding=0 cellspacing=0 width="100%">
<tr>
<td><![endif]>
<div>
<p class=MsoNormal>
Ensure switches 5 and 6 are in the ON position<o:p></o:p></p>
</div>
<![if !mso]></td>
</tr>
</table>
<![endif]></v:textbox>
</v:shape><![endif]--><!--[if !vml]--><span style="height: 85px; left: 0px; margin-left: 735px; margin-top: 229px; mso-ignore: vglayout; position: absolute; width: 260px; z-index: 251661312;"><br /></span><!--[endif]--><!--[if gte vml 1]><v:oval
id="Oval_x0020_2" o:spid="_x0000_s1027" style='position:absolute;left:0;
text-align:left;margin-left:261.5pt;margin-top:21.6pt;width:47.5pt;height:41.5pt;
z-index:251659264;visibility:visible;mso-wrap-style:square;
mso-width-percent:0;mso-wrap-distance-left:9pt;mso-wrap-distance-top:0;
mso-wrap-distance-right:9pt;mso-wrap-distance-bottom:0;
mso-position-horizontal:absolute;mso-position-horizontal-relative:text;
mso-position-vertical:absolute;mso-position-vertical-relative:text;
mso-width-percent:0;mso-width-relative:margin;v-text-anchor:middle' o:gfxdata="UEsDBBQABgAIAAAAIQC75UiUBQEAAB4CAAATAAAAW0NvbnRlbnRfVHlwZXNdLnhtbKSRvU7DMBSF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==
" filled="f" strokecolor="black [3213]" strokeweight="2pt"/><![endif]--><!--[if !vml]--><span style="height: 88px; left: 0px; margin-left: 524px; margin-top: 248px; mso-ignore: vglayout; position: absolute; width: 99px; z-index: 251659264;"><br /></span><!--[endif]--><!--[if gte vml 1]><v:shapetype id="_x0000_t13"
coordsize="21600,21600" o:spt="13" adj="16200,5400" path="m@0,l@0@1,0@1,0@2@0@2@0,21600,21600,10800xe">
<v:stroke joinstyle="miter"/>
<v:formulas>
<v:f eqn="val #0"/>
<v:f eqn="val #1"/>
<v:f eqn="sum height 0 #1"/>
<v:f eqn="sum 10800 0 #1"/>
<v:f eqn="sum width 0 #0"/>
<v:f eqn="prod @4 @3 10800"/>
<v:f eqn="sum width 0 @5"/>
</v:formulas>
<v:path o:connecttype="custom" o:connectlocs="@0,0;0,10800;@0,21600;21600,10800"
o:connectangles="270,180,90,0" textboxrect="0,@1,@6,@2"/>
<v:handles>
<v:h position="#0,#1" xrange="0,21600" yrange="0,10800"/>
</v:handles>
</v:shapetype><v:shape id="Right_x0020_Arrow_x0020_3" o:spid="_x0000_s1026"
type="#_x0000_t13" style='position:absolute;left:0;text-align:left;
margin-left:278.95pt;margin-top:17.25pt;width:18pt;height:16.5pt;rotation:-4671596fd;
z-index:251660288;visibility:visible;mso-wrap-style:square;
mso-wrap-distance-left:9pt;mso-wrap-distance-top:0;mso-wrap-distance-right:9pt;
mso-wrap-distance-bottom:0;mso-position-horizontal:absolute;
mso-position-horizontal-relative:text;mso-position-vertical:absolute;
mso-position-vertical-relative:text;v-text-anchor:middle' o:gfxdata="UEsDBBQABgAIAAAAIQC75UiUBQEAAB4CAAATAAAAW0NvbnRlbnRfVHlwZXNdLnhtbKSRvU7DMBSF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" adj="11700" fillcolor="yellow" stroked="f" strokeweight="2pt"/><![endif]--><!--[if !vml]--><span style="height: 38px; left: 0px; margin-left: 563px; margin-top: 240px; mso-ignore: vglayout; position: absolute; width: 33px; z-index: 251660288;"><br /></span></div>
<div class="MsoNormal">
<br /></div>
<div class="separator" style="clear: both; text-align: center;">
<a href="https://1.bp.blogspot.com/-T94Qze8We-Q/XGm3vWZedRI/AAAAAAAAVpY/BUOunvqkit0woXKXV2uNRUAVttti71AmgCLcBGAs/s1600/Video%2BSwitch%2BSettings%2Bfor%2BEGA-VGA.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="238" data-original-width="640" height="148" src="https://1.bp.blogspot.com/-T94Qze8We-Q/XGm3vWZedRI/AAAAAAAAVpY/BUOunvqkit0woXKXV2uNRUAVttti71AmgCLcBGAs/s400/Video%2BSwitch%2BSettings%2Bfor%2BEGA-VGA.jpg" width="400" /></a></div>
<br />
<div class="MsoNormal">
<br /></div>
<div class="MsoNormal">
<span style="font-family: "Arial","sans-serif"; font-size: 14.0pt; mso-bidi-font-size: 11.0pt;"><b>IBM 5155 Portable PC</b><o:p></o:p></span></div>
<div class="MsoNormal">
<br /></div>
<div class="MsoNormal">
<span style="font-family: "Arial","sans-serif";">The IBM 5155
contains an early version of the IBM 5160 motherboard.<br />
<br />
So, see below to see the 5160 motherboard switch settings, noting that the
two switches for video card type are normally set to CGA (because an <a href="http://minuszerodegrees.net/5150_5160/cards/ibm_cga.jpg">IBM CGA</a> card
is the card supplied by IBM in the 5155).<o:p></o:p></span></div>
<div class="MsoNormal">
<br /></div>
<div class="MsoNormal">
<br /></div>
<div class="MsoNormal">
<span style="font-family: "Arial","sans-serif"; font-size: 14.0pt; mso-bidi-font-size: 11.0pt;"><b>IBM 5160 PC/XT</b><o:p></o:p></span></div>
<div class="MsoNormal">
<br /></div>
<div class="MsoListParagraphCxSpFirst" style="mso-list: l1 level1 lfo2; text-indent: -.25in;">
<span style="font-family: Symbol; text-indent: -0.25in;">·<span style="font-family: "Times New Roman"; font-size: 7pt; font-stretch: normal; font-variant-east-asian: normal; font-variant-numeric: normal; line-height: normal;">
</span></span><span style="font-family: Arial, sans-serif; text-indent: -0.25in;">The
two video switches on SW1 (shown above) must be set for: 5=ON, 6=ON</span><!--[if !supportLists]--></div>
<div class="MsoListParagraphCxSpFirst" style="mso-list: l1 level1 lfo2; text-indent: -.25in;">
<span style="font-family: "Arial","sans-serif";"><br /></span></div>
<div class="MsoListParagraphCxSpMiddle" style="mso-list: l1 level1 lfo2; text-indent: -.25in;">
<!--[if !supportLists]--><span style="font-family: Symbol; mso-bidi-font-family: Symbol; mso-fareast-font-family: Symbol;"><span style="mso-list: Ignore;">·<span style="font: 7.0pt "Times New Roman";">
</span></span></span><!--[endif]--><span style="font-family: "Arial","sans-serif";">Do
not place the card in expansion <a href="http://minuszerodegrees.net/5160/misc/5160_slot_8.htm">slot 8</a> (<a href="https://www.lo-tech.co.uk/understanding-pcxt-slot-8/">the slot nearest
the CPU</a>) unless the card specifically supports slot 8. Cards that are
slot 8 compatible usually have a 'slot 8' jumper.<o:p></o:p></span></div>
<div class="MsoListParagraphCxSpMiddle" style="mso-list: l1 level1 lfo2; text-indent: -.25in;">
<span style="font-family: "Arial","sans-serif";"><br /></span></div>
<div class="MsoListParagraphCxSpMiddle" style="mso-list: l1 level1 lfo2; text-indent: -.25in;">
<!--[if !supportLists]--><span style="font-family: Symbol; mso-bidi-font-family: Symbol; mso-fareast-font-family: Symbol;"><span style="mso-list: Ignore;">·<span style="font: 7.0pt "Times New Roman";">
</span></span></span><!--[endif]--><span style="font-family: "Arial","sans-serif";">If
your IBM 5160 contains an XT-class hard disk controller, then be aware that
some VGA cards may have an address space <a href="http://minuszerodegrees.net/misc/resource_conflict.png">resource conflict</a> with
it.<o:p></o:p></span></div>
<div class="MsoListParagraphCxSpMiddle" style="mso-list: l1 level1 lfo2; text-indent: -.25in;">
<span style="font-family: "Arial","sans-serif";"><br /></span></div>
<div class="MsoListParagraphCxSpLast" style="mso-list: l1 level1 lfo2; text-indent: -.25in;">
<!--[if !supportLists]--><span style="font-family: Symbol; mso-bidi-font-family: Symbol; mso-fareast-font-family: Symbol;"><span style="mso-list: Ignore;">·<span style="font: 7.0pt "Times New Roman";">
</span></span></span><!--[endif]--><span style="font-family: "Arial","sans-serif";">Known
working VGA card lists: <a href="http://minuszerodegrees.net/5160/vga/5160_vga.htm">minuszerodegrees</a>, <a href="http://www.vcfed.org/forum/showthread.php?26432-8bit-Friendly-ISA-VGA-cards">vcf</a><o:p></o:p></span></div>
<div class="MsoNormal">
<br /></div>
<div class="MsoNormal">
<br /></div>
<div class="MsoNormal">
<span style="font-family: "Arial","sans-serif"; font-size: 14.0pt; mso-bidi-font-size: 11.0pt;"><b>Boot Error Beep Codes for Video</b><o:p></o:p></span></div>
<div class="MsoNormal">
<br /></div>
<div class="MsoNormal">
<span style="font-family: "Arial","sans-serif";">1 long and 2
short beeps<span style="mso-tab-count: 1;"> </span><span style="mso-tab-count: 1;"> </span>Video (Mono/CGA display circuitry) issue<o:p></o:p></span></div>
<div class="MsoNormal">
<span style="font-family: "Arial","sans-serif";">1 long and 3
short beeps.<span style="mso-tab-count: 1;"> </span><span style="mso-tab-count: 1;"> </span>Video (EGA) display circuitry<o:p></o:p></span></div>
<div class="MsoNormal">
<span style="font-family: "Arial","sans-serif";">1 beep, blank
or incorrect display<span style="mso-tab-count: 1;"> </span>Video display
circuitry.<o:p></o:p></span></div>
<div class="MsoNormal">
<br /></div>
<div class="MsoListParagraphCxSpFirst" style="mso-list: l0 level1 lfo3; text-indent: -.25in;">
<!--[if !supportLists]--><span style="font-family: Symbol; mso-bidi-font-family: Symbol; mso-fareast-font-family: Symbol;"><span style="mso-list: Ignore;">·<span style="font: 7.0pt "Times New Roman";">
</span></span></span><!--[endif]--><span style="font-family: "Arial","sans-serif";">Make
sure the SW1 switches are in the correct 5=ON 6=ON position (above)<o:p></o:p></span></div>
<div class="MsoListParagraphCxSpFirst" style="mso-list: l0 level1 lfo3; text-indent: -.25in;">
<span style="font-family: "Arial","sans-serif";"><br /></span></div>
<div class="MsoListParagraphCxSpMiddle" style="mso-list: l0 level1 lfo3; text-indent: -.25in;">
<!--[if !supportLists]--><span style="font-family: Symbol; mso-bidi-font-family: Symbol; mso-fareast-font-family: Symbol;"><span style="mso-list: Ignore;">·<span style="font: 7.0pt "Times New Roman";">
</span></span></span><!--[endif]--><span style="font-family: "Arial","sans-serif";">Ensure
there are no conflicts between VGA BIOS/addresses and other cards<o:p></o:p></span></div>
<div class="MsoListParagraphCxSpMiddle" style="mso-list: l0 level1 lfo3; text-indent: -.25in;">
<span style="font-family: "Arial","sans-serif";"><br /></span></div>
<div class="MsoListParagraphCxSpLast" style="mso-list: l0 level1 lfo3; text-indent: -.25in;">
<!--[if !supportLists]--><span style="font-family: Symbol; mso-bidi-font-family: Symbol; mso-fareast-font-family: Symbol;"><span style="mso-list: Ignore;">·<span style="font: 7.0pt "Times New Roman";">
</span></span></span><!--[endif]--><span style="font-family: "Arial","sans-serif";">Be
sure the video card configuration switches are correct (this could be hard
without documentation)<br clear="all" style="mso-special-character: line-break; page-break-before: always;" />
<o:p></o:p></span></div>
<div class="MsoListParagraphCxSpLast" style="mso-list: l0 level1 lfo3; text-indent: -.25in;">
<span style="font-family: "Arial","sans-serif";"><br /></span></div>
<div class="MsoNormal">
<b><span style="font-family: "Arial","sans-serif";"><span style="font-size: large;">Suitable VGA
cards</span></span></b><span style="font-family: "Arial","sans-serif";"><br style="mso-special-character: line-break;" />
<!--[if !supportLineBreakNewLine]--><br style="mso-special-character: line-break;" />
<!--[endif]--><o:p></o:p></span></div>
<table border="0" cellpadding="0" cellspacing="0" class="MsoNormalTable" style="border-collapse: collapse; mso-yfti-tbllook: 1184;">
<tbody>
<tr style="mso-yfti-firstrow: yes; mso-yfti-irow: 0;">
<td style="padding: 4.5pt 4.5pt 4.5pt 4.5pt; width: 15.0pt;" valign="top" width="30">
<div class="MsoNormal">
<span style="font-family: "Arial","sans-serif";">•<o:p></o:p></span></div>
</td>
<td style="padding: 4.5pt 4.5pt 4.5pt 4.5pt;" valign="top">
<div class="MsoNormal">
<span style="font-family: "Arial","sans-serif";">You must
not assume that because a particular VGA card works in an IBM 5160 (IBM XT)
that the same card will also work in an IBM 5150.<o:p></o:p></span></div>
</td>
</tr>
<tr style="mso-yfti-irow: 1;">
<td style="padding: 4.5pt 4.5pt 4.5pt 4.5pt;" valign="top">
<div class="MsoNormal">
<span style="font-family: "Arial","sans-serif";">•<o:p></o:p></span></div>
</td>
<td style="padding: 4.5pt 4.5pt 4.5pt 4.5pt;" valign="top">
<div class="MsoNormal">
<span style="font-family: "Arial","sans-serif";">The
documentation for some 16-bit VGA cards indicates that they work in an 8-bit
expansion slot. You should <b>not</b> expect that to mean all
8-bit slots. Many such cards are intended only for an 8-bit slot within
an AT-class computer, and will not work in an IBM 5150. The maker's
documentation for the card will indicate whether the card will work in an IBM
5150.<o:p></o:p></span></div>
</td>
</tr>
<tr style="mso-yfti-irow: 2; mso-yfti-lastrow: yes;">
<td style="padding: 4.5pt 4.5pt 4.5pt 4.5pt;" valign="top">
<div class="MsoNormal">
<span style="font-family: "Arial","sans-serif";">•<o:p></o:p></span></div>
</td>
<td style="padding: 4.5pt 4.5pt 4.5pt 4.5pt;" valign="top">
<div class="MsoNormal">
<span style="font-family: "Arial","sans-serif";">Some people
have discovered that certain 8-bit compatible 16-bit VGA cards can be made to
work in a 5150/5160 if the 8088 CPU on the motherboard is upgraded to a V20
CPU. This may not work, though.<o:p></o:p></span></div>
<div class="MsoNormal">
<span style="font-family: "Arial","sans-serif";"><br /></span></div>
</td>
</tr>
</tbody></table>
<div class="MsoNormal">
<b><span style="font-family: "Arial","sans-serif";"><span style="font-size: large;">VGA card
configuration</span></span></b><span style="font-family: "Arial","sans-serif";"><br style="mso-special-character: line-break;" />
<!--[if !supportLineBreakNewLine]--><br style="mso-special-character: line-break;" />
<!--[endif]--><o:p></o:p></span></div>
<table border="0" cellpadding="0" cellspacing="0" class="MsoNormalTable" style="border-collapse: collapse; mso-yfti-tbllook: 1184;">
<tbody>
<tr style="mso-yfti-firstrow: yes; mso-yfti-irow: 0;">
<td style="padding: 4.5pt 4.5pt 4.5pt 4.5pt; width: 15.0pt;" valign="top" width="30">
<div class="MsoNormal">
<span style="font-family: "Arial","sans-serif";">•<o:p></o:p></span></div>
</td>
<td style="padding: 4.5pt 4.5pt 4.5pt 4.5pt;" valign="top">
<div class="MsoNormal">
<span style="font-family: "Arial","sans-serif";">Some VGA
cards have configuration switches and/or jumpers. An example is <a href="http://minuszerodegrees.net/rom/photo/video_seven_vega_vga_62L1989V5.jpg">here</a>.
Refer to the card's documentation to ensure that those switches/jumpers
are set appropriately. For the switches, do not confuse the <a href="http://minuszerodegrees.net/5150_5160/misc/5150_5160_on_versus_off.htm">off</a> position
with the <a href="http://minuszerodegrees.net/5150_5160/misc/5150_5160_on_versus_off.htm">on</a> position.<o:p></o:p></span></div>
</td>
</tr>
<tr style="mso-yfti-irow: 1; mso-yfti-lastrow: yes;">
<td style="padding: 4.5pt 4.5pt 4.5pt 4.5pt;" valign="top">
<div class="MsoNormal">
<span style="font-family: "Arial","sans-serif";">•<o:p></o:p></span></div>
</td>
<td style="padding: 4.5pt 4.5pt 4.5pt 4.5pt;" valign="top">
<div class="MsoNormal">
<span style="font-family: "Arial","sans-serif";">16-bit VGA
cards that are known to work in an IBM 5150 PC usually (not always) need to
be manually configured to run in 8-bit mode. Refer to the card's
documentation, because configuration is done differently on different cards.<o:p></o:p></span></div>
</td>
</tr>
</tbody></table>
<div class="MsoNormal">
<br /></div>
<br />Anne Barelahttp://www.blogger.com/profile/15220828568926183065noreply@blogger.com0tag:blogger.com,1999:blog-3086558728571967180.post-12937869728814977882019-02-09T21:52:00.001-05:002019-02-09T21:56:49.810-05:00Documentation for the Paradise Systems MGC II 8-bit MGA/CGA/Composite Video Card<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhYX5z5H7LU5j0Kzf_uMHmie3lfz0jmKlj3eww9cR855CNDn3SpsJjcU8aICPAzZX3dda48UPv3MAVak2HBnvK-9YKqvDOY_5n7_-es7j9UTco03qQFp4xmJhPTpADxuwVwyUMM0_1eL44/s1600/P1000172.JPG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1200" data-original-width="1600" height="480" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhYX5z5H7LU5j0Kzf_uMHmie3lfz0jmKlj3eww9cR855CNDn3SpsJjcU8aICPAzZX3dda48UPv3MAVak2HBnvK-9YKqvDOY_5n7_-es7j9UTco03qQFp4xmJhPTpADxuwVwyUMM0_1eL44/s640/P1000172.JPG" width="640" /></a></div>
<div class="separator" style="clear: both; text-align: center;">
<br /></div>
<div class="separator" style="clear: both; text-align: left;">
In the 4th IBM PC I purchased, an IBM PC/XT 5160, the video card that was in the system was the original card bought around May 1986. Fortunately I also had the IBM binders from the PC and the documentation was in the system binder.</div>
<div class="separator" style="clear: both; text-align: left;">
<br /></div>
<div class="separator" style="clear: both; text-align: left;">
This is the Paradise MGC II video card version 4.0. Full length, it can display Monochrome Graphics Adapter, Color Graphics Adapter, or Composite video out (selectable via jumper). </div>
<br />
<div class="separator" style="clear: both; text-align: center;">
<a href="https://4.bp.blogspot.com/-CnbBpVvAQ0I/XF-L9SoZ4GI/AAAAAAAAVm4/PBFrq9eXkhsuWCen0hFUTPRCltEpbwjSQCLcBGAs/s1600/P1000173.JPG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1200" data-original-width="1600" height="480" src="https://4.bp.blogspot.com/-CnbBpVvAQ0I/XF-L9SoZ4GI/AAAAAAAAVm4/PBFrq9eXkhsuWCen0hFUTPRCltEpbwjSQCLcBGAs/s640/P1000173.JPG" width="640" /></a></div>
<div class="separator" style="clear: both; text-align: left;">
<br /></div>
<div class="separator" style="clear: both; text-align: left;">
The card was built to be modular so daughterboards such as a parallel printer adapter board could be added. The card I received had no daughterboards.</div>
<br />
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiN4UIZX3tzTIf6kx343v2KlC_swU1SIvTDONeZeP7XrlfQpqQ1b3ntiOGGlAgWZURcFMfimUpY0Z-m7beCP9qLfOZc8401MMRX7bZdui3215o06wZy_E1WgwGKY4e4XZD8XEJcv4oJ3d0/s1600/P1000174.JPG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1200" data-original-width="1600" height="480" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiN4UIZX3tzTIf6kx343v2KlC_swU1SIvTDONeZeP7XrlfQpqQ1b3ntiOGGlAgWZURcFMfimUpY0Z-m7beCP9qLfOZc8401MMRX7bZdui3215o06wZy_E1WgwGKY4e4XZD8XEJcv4oJ3d0/s640/P1000174.JPG" width="640" /></a></div>
<div class="separator" style="clear: both; text-align: center;">
<br /></div>
<div class="separator" style="clear: both; text-align: left;">
The documentation for this card is very scant on the Internet, with the only real documentation I found is at:</div>
<ul>
<li><a href="https://stason.org/TULARC/pc/graphics-cards/U-Z/WESTERN-DIGITAL-CORPORATION-CGA-PARADISE-MODULAR-G-72.html" target="_blank">Here - Bare configuration</a></li>
</ul>
<div>
The <a href="https://stason.org/TULARC/pc/graphics-cards/U-Z/WESTERN-DIGITAL-CORPORATION-CGA-PARADISE-MODULAR-G-72.html" target="_blank">documentation hints</a> that Paradise may have been affiliated with Western Digital. Wikipedia bears this out without reference:</div>
<div>
</div>
<br />
<ul style="background-color: white; color: #222222; font-family: sans-serif; font-size: 14px; list-style-image: url("data:image/svg+xml,%3Csvg xmlns=%22http://www.w3.org/2000/svg%22 width=%225%22 height=%2213%22%3E %3Ccircle cx=%222.5%22 cy=%229.5%22 r=%222.5%22 fill=%22%2300528c%22/%3E %3C/svg%3E"); margin: 0.3em 0px 0px 1.6em; padding: 0px;">
<li style="margin-bottom: 0.1em;"><a class="new" href="https://en.wikipedia.org/w/index.php?title=Paradise_Systems&action=edit&redlink=1" style="background: none; color: #a55858; text-decoration-line: none;" title="Paradise Systems (page does not exist)">Paradise Systems</a> - acquired by <a href="https://en.wikipedia.org/wiki/Western_Digital" style="background: none; color: #0b0080; text-decoration-line: none;" title="Western Digital">Western Digital</a>, later sold off to <a href="https://en.wikipedia.org/wiki/Philips" style="background: none; color: #0b0080; text-decoration-line: none;" title="Philips">Philips</a></li>
</ul>
<div>
<span style="color: #222222; font-family: sans-serif;"><span style="font-size: 14px;"><br /></span></span></div>
<div>
<span style="color: #222222; font-family: sans-serif;"><span style="font-size: 14px;">If anyone knows of decent documentation for Paradise gear, please let the Internet know including me at <a href="https://twitter.com/mikedigitalhome" target="_blank">@mikedigitalhome on Twitter</a>.</span></span><br />
<span style="color: #222222; font-family: sans-serif;"><span style="font-size: 14px;"><br /></span></span></div>
<h2>
Scanned Documentation</h2>
<br />
Here is a PDF of the material I have: pictures, disk, warranty card, quick sheet, and manual<br />
<br />
<a href="https://drive.google.com/open?id=1oqiglS4nSugMQO3Gnw554oRrfq_GQSjX" target="_blank">Paradise Systems MGC II Video Card Documentation (PDF)</a><br />
<br />
<br />
<br />Anne Barelahttp://www.blogger.com/profile/15220828568926183065noreply@blogger.com1tag:blogger.com,1999:blog-3086558728571967180.post-53664426107965711702019-02-09T14:06:00.003-05:002019-02-09T14:10:54.113-05:00IBM Portable PC 5155 Video Connection<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhm9PHrCdW4uqMg57-fISVsnKI4aGTvuKQgKAFBe7BopGiLa-XDiiSLcdczG-LFJvHGlpYdkBW31wGyGqyec-qTba1qpNpCPzRjjKSnXJ0vAxxsauCgKU7tmMehcG3dCHswoiJOKVoxNJk/s1600/5155-display-working.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1200" data-original-width="1600" height="480" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhm9PHrCdW4uqMg57-fISVsnKI4aGTvuKQgKAFBe7BopGiLa-XDiiSLcdczG-LFJvHGlpYdkBW31wGyGqyec-qTba1qpNpCPzRjjKSnXJ0vAxxsauCgKU7tmMehcG3dCHswoiJOKVoxNJk/s640/5155-display-working.jpg" width="640" /></a></div>
<br />
Since buying one IBM PC, I have now progressed to buying 4: 1 PC 5150, 2 PC/XT 5160, and an IBM Portable 5155. Two types of COMPAQ portables are on the way. Help!<br />
<br />
<b>Here I will focus on the IBM Portable PC Model 5155</b>. I bought this off of Craigslist from a gentleman who found it in a thrift shop. It was a bit rough, <b>video was there but only tearing lines</b>, the brightness know is missing and one keyboard retention foot is broken.<br />
<br />
<b>Get the manual</b><br />
<br />
I suggest you go to this page to get a copy of the maintenance manual for this computer:<br />
<a href="https://ibm.retropc.se/hmr/hmr.html" target="_blank">https://ibm.retropc.se/hmr/hmr.html </a><br />
<br />
<b>Opening the IBM 5155 Computer Case</b><br />
<br />
Opening up the PC, you remove 6 screws located around the front of the PC looking at the CRT and disk drives. Pull the case off. Remove the internal RF shield on the PC half via 3 screws around the shield. Bag the screws for safe keeping.<br />
<br />
<b>My Experience - ugh!</b><br />
<b><br /></b>
<b>The short of it: Try to use a CGA card, preferably an IBM CGA card or close compatible.</b><br />
<br />
I looked around the video card. There was a loose twisted pair of wires. Black and Yellow on a 4 pin header. Some Googling found this was composite input to the video section, yes we found why there was no text on the display!<br />
<br />
The video card inside was an Everex EV659. Interesting as this is billed as CGA/MDA/EGA compatible. Like many vintage hardware pieces/cards, the online documentation is pretty sketchy.<br />
<br />
But for the life of me I could not get composite video out of the header pins.<br />
<br />
Maybe it's this bad 2.2uf tantalum capacitor next to the header? Time to get some more capacitors from Digi-key!<br />
<br />
At this point I decided to use the Everex card in another PC. It's flexibility is better suited to a desktop. So I grabbed a known good CGA adapter, the <a href="https://21stdigitalhome.blogspot.com/2019/01/the-ibm-pc-5150-part-5-mystery-video.html" target="_blank"><b>CGA clone</b> I documented in this earlier post</a>.<br />
<br />
The composite out didn't correspond to the IBM CGA header. Nearly all the early IBM compatible 8-bit hards have a 4 pin header for composite video out, which may be marked RF adapter as that would be how an RF modulator would connect so a OC could display to a TV of the time without composite in. I know of no one that actually used a TV, they got a mono monitor and used that if an IBM monitor was too expensive (it often was).<br />
<br />
I did confirm with a CGA monitor that the portable booted correctly (with a DOS Boot Disk). So the PC is ok.<br />
<br />
<b>Connecting the IBM Portable 5155 to a display card</b><br />
<br />
Determine the composite video out of your display card. For the official IBM CGA card, here is the manul picture:<br />
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiY_Zpxu9HTrGu0__OxTPRFIsj4K1ru9FS_IeBJ63PMi7t8ciVHahCH_MeSSo08Vmx8g1zE2TiWD-1tqE8RQDsBXCoYuuom2OtoyOPr7g9Ml9BLYCrdZW79ftg4cQY6_E9BNWzxmF1GpEo/s1600/Official+CGA+Composite+Connection.JPG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="618" data-original-width="663" height="596" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiY_Zpxu9HTrGu0__OxTPRFIsj4K1ru9FS_IeBJ63PMi7t8ciVHahCH_MeSSo08Vmx8g1zE2TiWD-1tqE8RQDsBXCoYuuom2OtoyOPr7g9Ml9BLYCrdZW79ftg4cQY6_E9BNWzxmF1GpEo/s640/Official+CGA+Composite+Connection.JPG" width="640" /></a></div>
So the Yellow wire (Composite In) should in theory go to CGA P1 Pin 3 and the Black wire (Ground) should go to P1 Pin 4.<br />
<br />
The picture on minusZerodegrees.net shows this same connection for a CGA card.<br />
<div class="separator" style="clear: both; text-align: center;">
<a href="https://4.bp.blogspot.com/-2bR1NMnFrUY/XF8c2EmnyOI/AAAAAAAAVlk/HGkCzy7mHtQw77_h2x86fPMTHSPLGSosgCLcBGAs/s1600/5155%2BVideo%2BConnection%2Bp1_on_cga.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="585" data-original-width="1200" height="312" src="https://4.bp.blogspot.com/-2bR1NMnFrUY/XF8c2EmnyOI/AAAAAAAAVlk/HGkCzy7mHtQw77_h2x86fPMTHSPLGSosgCLcBGAs/s640/5155%2BVideo%2BConnection%2Bp1_on_cga.jpg" width="640" /></a></div>
<br />
If you do not use an official IBM CGA card, the connections and picture may not be correct! As it turns out, my clone CGA card apparently has the header upside down from the official card!<br />
<br />
<div class="separator" style="clear: both; text-align: center;">
<a href="https://3.bp.blogspot.com/-XxexSGNPOTw/XF8eZeiEgrI/AAAAAAAAVl0/48wvIRxKgbYlGDIxKRlB6tKJWv5-ye-qwCLcBGAs/s1600/video%2Bconnections.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1200" data-original-width="1600" height="480" src="https://3.bp.blogspot.com/-XxexSGNPOTw/XF8eZeiEgrI/AAAAAAAAVl0/48wvIRxKgbYlGDIxKRlB6tKJWv5-ye-qwCLcBGAs/s640/video%2Bconnections.jpg" width="640" /></a></div>
<br />
I used male to female jumper wires as the connection is very tight and the clone card has 4 pins where the connector has pin 3 keyed (Pin 2 missing) so the 5155 video in cable doesn't fit.<br />
<br />
<b>Using non-official CGA or other cards</b><br />
<br />
The card you plan to use should have a good video composite out and ground. Many cards have RCA jacks out the back that provide this, but it is awkward and unsightly to have a connector to the jack snake back in to connect to the display's Yellow and Black connection.<br />
<br />
I suggest if you are probing your video card for composite out to use an external monitor (if you have a composite monitor) so you don't accidentally put that +12V line onto your 5155 video in, as it might damage it. I have a small LCD composite monitor I found dumpster diving but composite monitors can be found in other places, including old TVs with composite in. Maybe even an old VCR with video inputs and a better system for output.<br />
<br />
<b>Can I get VGA on the display (I don't think so)</b><br />
<br />
If you were thinking of going up to VGA, note that there are a limited number of vintage VGA cards that work with 8 bit IBM PCs. <a href="http://minuszerodegrees.net/5150/vga/5150_vga.htm" target="_blank">See this list for some known to work</a>. Also such cards probably don't have video out or at least one that will work better than CGA. CGA was designed for regular NTSC or PAL composite monitors of the era. VGA was designed for specialty monitors.<br />
<br />
Perhaps you could replace the video section with something that will display VGA (or better). This would be a non-vintage mod but it sounds interesting!<br />
<br />
<b>Conclusion</b><br />
<br />
I'm glad the video section was ok as I am not a tube video expert by any means. I like the portable format, they were the first IBM PCs I actually used for school work. I even wrote Unix clone programs like for mv, ls, etc.<br />
<br />
If you have more info on the IBM Portable 5155 beyond the excellent documentation at <a href="https://ibm.retropc.se/index-2.html" target="_blank">minuszerodegrees.net</a>, please share.<br />
<br />
<b>Bonus: </b>If you see the display pictures at the top, what is strange about that directory list? Let me know on Twitter <a href="https://twitter.com/mikedigitalhome" target="_blank">@mikedigitalhome</a>Anne Barelahttp://www.blogger.com/profile/15220828568926183065noreply@blogger.com2tag:blogger.com,1999:blog-3086558728571967180.post-35479396579841161702019-01-24T22:20:00.002-05:002019-02-09T12:48:29.933-05:00The IBM PC 5150: Part 7 - The Hard Disk Controller<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhnmqSUD752faKMIr0WJorinPrlL_Jt1j6X0B8Sw8w7VVdhLSEeLNz9cBUpD5-hE343TmGJvFyHiXZxdinCdsNC99IJni2WPgaUeFU1pxv1FwA5n0ubfW6hgzZNapxVky7tWWPUmW3cTHU/s1600/HD-controller.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1200" data-original-width="1600" height="480" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhnmqSUD752faKMIr0WJorinPrlL_Jt1j6X0B8Sw8w7VVdhLSEeLNz9cBUpD5-hE343TmGJvFyHiXZxdinCdsNC99IJni2WPgaUeFU1pxv1FwA5n0ubfW6hgzZNapxVky7tWWPUmW3cTHU/s640/HD-controller.jpg" width="640" /></a></div>
<br />
<a href="https://21stdigitalhome.blogspot.com/2019/01/the-ibm-pc-5150-part-6-choc-full-ast.html" target="_blank">Continuing from part 6</a> of my teardown of a one owner IBM PC 5150 from the 1980s.<br />
<br />
Here is the controller card supporting a half-sized hard drive. I haven't gotten down to the hard drive label but I have a suspicion it's an RLL 30MB unit (given RLL added 50% to a 20MB drive). Let's look at the card controlling it:<br />
<br />
The left side reads DATA TECH 5160 X. Assembly REV D.<br />
<br />
There is an <a href="http://www.minuszerodegrees.net/manuals/DTC/DTC%205160X%20-%20Installation%20Guide.pdf" target="_blank">installation guide on minuszerodegrees.net</a>! It doesn't say what Rev D is but for Rev C, 10-05-88, BIOS address jumpers so this must post-date 10/1988 meaning this was a later add-on and this is supported by the fact I was given the original full height floppy where the half-height hard drive and floppy now live.<br />
<br />
With a google we have <a href="https://stason.org/TULARC/pc/hard-disk-floppy-controllers/C-D/DATA-TECHNOLOGY-CORPORATION-DTC5150X-Two-MFM-ST506.html" target="_blank">stason.org's documentation</a>:<br />
<br />
<blockquote class="tr_bq">
<span style="background-color: white; color: black; font-family: "arial"; font-size: large; overflow-wrap: break-word;"><span style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: 700; line-height: inherit; margin: 0px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;"></span></span><br />
<blockquote class="tr_bq" style="border: 0px; font: inherit; margin-bottom: 10px; margin-top: 10px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;">
<span style="background-color: white; color: black; font-family: "arial"; font-size: large; overflow-wrap: break-word;"><span style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: 700; line-height: inherit; margin: 0px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;">DATA TECHNOLOGY CORPORATION</span></span><br />
<blockquote>
<span style="background-color: white; color: black; font-family: "arial"; font-size: large; overflow-wrap: break-word;"><span style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: 700; line-height: inherit; margin: 0px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;">DTC5150X, DTC5160X</span></span><br />
<blockquote>
<span style="background-color: white; color: black; font-family: "arial"; font-size: large; overflow-wrap: break-word;"><span style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: 700; line-height: inherit; margin: 0px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;">Data bus: 8-bit, ISA.</span></span><br />
<span style="background-color: white; color: black; font-family: "arial"; font-size: large; overflow-wrap: break-word;"><span style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: 700; line-height: inherit; margin: 0px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;">Size: Half-length, full-height card.</span></span><br />
<span style="background-color: white; color: black; font-family: "arial"; font-size: large; overflow-wrap: break-word;"><span style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: 700; line-height: inherit; margin: 0px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;">Hard drives supported: DTC5150X:Two MFM ST506/412 drives</span></span><br />
<span style="background-color: white; color: black; font-family: "arial"; font-size: large; overflow-wrap: break-word;"><span style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: 700; line-height: inherit; margin: 0px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;">DTC5160X:Two RLL ST506/412 drives</span></span><br />
<span style="background-color: white; color: black; font-family: "arial"; font-size: large; overflow-wrap: break-word;"><span style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: 700; line-height: inherit; margin: 0px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;">Floppy drives supported: None</span></span></blockquote>
</blockquote>
</blockquote>
<span style="background-color: white; color: black; font-family: "arial"; font-size: large; overflow-wrap: break-word;"><span style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: 700; line-height: inherit; margin: 0px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;">
</span></span></blockquote>
And the diagram is similar to below except W3 (1 position) is an unpopulated 8 position in my board:<br />
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgZyHayFEXPH43IooHDc81Y7kbel33eQour4_3sPeZtjjZZRhvA0cKIMCDp8uYJi8qu1M1il9ndAnhZCiQg64vDX0D5rS3SscrO4ZT_4lUz19AECgrVKdh32qGMMvWvLf2_YGQ72RsjijY/s1600/5160X.JPG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="461" data-original-width="548" height="269" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgZyHayFEXPH43IooHDc81Y7kbel33eQour4_3sPeZtjjZZRhvA0cKIMCDp8uYJi8qu1M1il9ndAnhZCiQg64vDX0D5rS3SscrO4ZT_4lUz19AECgrVKdh32qGMMvWvLf2_YGQ72RsjijY/s320/5160X.JPG" width="320" /></a></div>
<table border="" cellpadding="9" cellspacing="2" style="background-color: white; border-collapse: collapse; border-spacing: 0px; border: 0px; font-family: Arial, Helvetica, sans-serif; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; margin: 20px 5px; max-width: 100%; overflow-wrap: break-word; padding: 0px; table-layout: fixed; vertical-align: top; width: 522px;"><tbody style="border: 0px; font: inherit; margin: 0px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;">
<tr style="border: 0px; font: inherit; margin: 0px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;"><td bgcolor="#000000" colspan="2" style="border: 0px; font: inherit; margin: 0px; overflow-wrap: break-word; padding: 6px; vertical-align: top;" valign="TOP" width="100%"><div align="CENTER" style="border: 0px; font: inherit; margin-bottom: 10px; margin-top: 10px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;">
<span style="color: white; font-family: "arial"; font-size: x-small; overflow-wrap: break-word;"><span style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: 700; line-height: inherit; margin: 0px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;">CONNECTIONS</span></span></div>
</td></tr>
<tr style="border: 0px; font: inherit; margin: 0px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;"><td style="border: 0px; font: inherit; margin: 0px; overflow-wrap: break-word; padding: 6px; vertical-align: top;" valign="TOP" width="69%"><span style="font-family: "arial"; overflow-wrap: break-word;"><span style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: 700; line-height: inherit; margin: 0px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;"></span></span><br />
<div align="CENTER" style="border: 0px; font: inherit; margin-bottom: 10px; margin-top: 10px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;">
<span style="font-family: "arial"; overflow-wrap: break-word;"><span style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: 700; line-height: inherit; margin: 0px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;">Function</span></span></div>
</td><td style="border: 0px; font: inherit; margin: 0px; overflow-wrap: break-word; padding: 6px; vertical-align: top;" valign="TOP" width="31%"><span style="font-family: "arial"; overflow-wrap: break-word;"><span style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: 700; line-height: inherit; margin: 0px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;"></span></span><br />
<div align="CENTER" style="border: 0px; font: inherit; margin-bottom: 10px; margin-top: 10px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;">
<span style="font-family: "arial"; overflow-wrap: break-word;"><span style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: 700; line-height: inherit; margin: 0px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;">Location</span></span></div>
</td></tr>
<tr style="border: 0px; font: inherit; margin: 0px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;"><td style="border: 0px; font: inherit; margin: 0px; overflow-wrap: break-word; padding: 6px; vertical-align: top;" valign="TOP" width="69%"><span style="font-family: "arial"; overflow-wrap: break-word;"></span><br />
<div align="JUSTIFY" style="border: 0px; font: inherit; margin-bottom: 10px; margin-top: 10px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;">
<span style="font-family: "arial"; overflow-wrap: break-word;">34-pin control cable connector-hard drive</span></div>
</td><td style="border: 0px; font: inherit; margin: 0px; overflow-wrap: break-word; padding: 6px; vertical-align: top;" valign="TOP" width="31%"><span style="font-family: "arial"; overflow-wrap: break-word;"></span><br />
<div align="CENTER" style="border: 0px; font: inherit; margin-bottom: 10px; margin-top: 10px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;">
<span style="font-family: "arial"; overflow-wrap: break-word;">J1</span></div>
</td></tr>
<tr style="border: 0px; font: inherit; margin: 0px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;"><td style="border: 0px; font: inherit; margin: 0px; overflow-wrap: break-word; padding: 6px; vertical-align: top;" valign="TOP" width="69%"><span style="font-family: "arial"; overflow-wrap: break-word;"></span><br />
<div align="JUSTIFY" style="border: 0px; font: inherit; margin-bottom: 10px; margin-top: 10px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;">
<span style="font-family: "arial"; overflow-wrap: break-word;">20-pin data cable connector-drive 0</span></div>
</td><td style="border: 0px; font: inherit; margin: 0px; overflow-wrap: break-word; padding: 6px; vertical-align: top;" valign="TOP" width="31%"><span style="font-family: "arial"; overflow-wrap: break-word;"></span><br />
<div align="CENTER" style="border: 0px; font: inherit; margin-bottom: 10px; margin-top: 10px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;">
<span style="font-family: "arial"; overflow-wrap: break-word;">J2</span></div>
</td></tr>
<tr style="border: 0px; font: inherit; margin: 0px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;"><td style="border: 0px; font: inherit; margin: 0px; overflow-wrap: break-word; padding: 6px; vertical-align: top;" valign="TOP" width="69%"><span style="font-family: "arial"; overflow-wrap: break-word;"></span><br />
<div align="JUSTIFY" style="border: 0px; font: inherit; margin-bottom: 10px; margin-top: 10px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;">
<span style="font-family: "arial"; overflow-wrap: break-word;">20-pin data cable connector-drive 1</span></div>
</td><td style="border: 0px; font: inherit; margin: 0px; overflow-wrap: break-word; padding: 6px; vertical-align: top;" valign="TOP" width="31%"><span style="font-family: "arial"; overflow-wrap: break-word;"></span><br />
<div align="CENTER" style="border: 0px; font: inherit; margin-bottom: 10px; margin-top: 10px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;">
<span style="font-family: "arial"; overflow-wrap: break-word;">J3</span></div>
</td></tr>
<tr style="border: 0px; font: inherit; margin: 0px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;"><td style="border: 0px; font: inherit; margin: 0px; overflow-wrap: break-word; padding: 6px; vertical-align: top;" valign="TOP" width="69%"><span style="font-family: "arial"; overflow-wrap: break-word;"></span><br />
<div align="JUSTIFY" style="border: 0px; font: inherit; margin-bottom: 10px; margin-top: 10px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;">
<span style="font-family: "arial"; overflow-wrap: break-word;">4-pin connector-drive active LED</span></div>
</td><td style="border: 0px; font: inherit; margin: 0px; overflow-wrap: break-word; padding: 6px; vertical-align: top;" valign="TOP" width="31%"><span style="font-family: "arial"; overflow-wrap: break-word;"></span><br />
<div align="CENTER" style="border: 0px; font: inherit; margin-bottom: 10px; margin-top: 10px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;">
<span style="font-family: "arial"; overflow-wrap: break-word;">J5</span></div>
</td></tr>
</tbody></table>
<table border="" cellpadding="9" cellspacing="2" style="background-color: white; border-collapse: collapse; border-spacing: 0px; border: 0px; font-family: Arial, Helvetica, sans-serif; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; margin: 20px 5px; max-width: 100%; overflow-wrap: break-word; padding: 0px; table-layout: fixed; vertical-align: top; width: 522px;"><tbody style="border: 0px; font: inherit; margin: 0px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;">
<tr style="border: 0px; font: inherit; margin: 0px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;"><td bgcolor="#000000" colspan="4" style="border: 0px; font: inherit; margin: 0px; overflow-wrap: break-word; padding: 6px; vertical-align: top;" valign="TOP" width="100%"><div align="CENTER" style="border: 0px; font: inherit; margin-bottom: 10px; margin-top: 10px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;">
<span style="color: white; font-family: "arial"; font-size: x-small; overflow-wrap: break-word;"><span style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: 700; line-height: inherit; margin: 0px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;">USER CONFIGURABLE SETTINGS</span></span></div>
</td></tr>
<tr style="border: 0px; font: inherit; margin: 0px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;"><td colspan="2" style="border: 0px; font: inherit; margin: 0px; overflow-wrap: break-word; padding: 6px; vertical-align: top;" valign="TOP" width="58%"><span style="font-family: "arial"; overflow-wrap: break-word;"><span style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: 700; line-height: inherit; margin: 0px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;"></span></span><br />
<div align="CENTER" style="border: 0px; font: inherit; margin-bottom: 10px; margin-top: 10px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;">
<span style="font-family: "arial"; overflow-wrap: break-word;"><span style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: 700; line-height: inherit; margin: 0px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;">Function</span></span></div>
</td><td style="border: 0px; font: inherit; margin: 0px; overflow-wrap: break-word; padding: 6px; vertical-align: top;" valign="TOP" width="23%"><span style="font-family: "arial"; overflow-wrap: break-word;"><span style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: 700; line-height: inherit; margin: 0px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;"></span></span><br />
<div align="CENTER" style="border: 0px; font: inherit; margin-bottom: 10px; margin-top: 10px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;">
<span style="font-family: "arial"; overflow-wrap: break-word;"><span style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: 700; line-height: inherit; margin: 0px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;">Location</span></span></div>
</td><td style="border: 0px; font: inherit; margin: 0px; overflow-wrap: break-word; padding: 6px; vertical-align: top;" valign="TOP" width="20%"><span style="font-family: "arial"; overflow-wrap: break-word;"><span style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: 700; line-height: inherit; margin: 0px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;"></span></span><br />
<div align="CENTER" style="border: 0px; font: inherit; margin-bottom: 10px; margin-top: 10px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;">
<span style="font-family: "arial"; overflow-wrap: break-word;"><span style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: 700; line-height: inherit; margin: 0px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;">Setting</span></span></div>
</td></tr>
<tr style="border: 0px; font: inherit; margin: 0px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;"><td style="border: 0px; font: inherit; margin: 0px; overflow-wrap: break-word; padding: 6px; vertical-align: top;" valign="TOP" width="3%">»</td><td style="border: 0px; font: inherit; margin: 0px; overflow-wrap: break-word; padding: 6px; vertical-align: top;" valign="TOP" width="58%"><span style="font-family: "arial"; overflow-wrap: break-word;"></span><br />
<div align="JUSTIFY" style="border: 0px; font: inherit; margin-bottom: 10px; margin-top: 10px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;">
<span style="font-family: "arial"; overflow-wrap: break-word;"></span><span style="font-family: "arial"; overflow-wrap: break-word;">615 cylinders, 4 heads</span></div>
</td><td style="border: 0px; font: inherit; margin: 0px; overflow-wrap: break-word; padding: 6px; vertical-align: top;" valign="TOP" width="23%"><span style="font-family: "arial"; overflow-wrap: break-word;"></span><br />
<div align="CENTER" style="border: 0px; font: inherit; margin-bottom: 10px; margin-top: 10px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;">
<span style="font-family: "arial"; overflow-wrap: break-word;">W3 (5150x only)</span></div>
</td><td style="border: 0px; font: inherit; margin: 0px; overflow-wrap: break-word; padding: 6px; vertical-align: top;" valign="TOP" width="20%"><span style="font-family: "arial"; overflow-wrap: break-word;"></span><br />
<div align="CENTER" style="border: 0px; font: inherit; margin-bottom: 10px; margin-top: 10px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;">
<span style="font-family: "arial"; overflow-wrap: break-word;">closed</span></div>
</td></tr>
<tr style="border: 0px; font: inherit; margin: 0px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;"><td style="border: 0px; font: inherit; margin: 0px; overflow-wrap: break-word; padding: 6px; vertical-align: top;" valign="TOP" width="3%"></td><td style="border: 0px; font: inherit; margin: 0px; overflow-wrap: break-word; padding: 6px; vertical-align: top;" valign="TOP" width="58%"><span style="font-family: "arial"; overflow-wrap: break-word;"></span><br />
<div align="JUSTIFY" style="border: 0px; font: inherit; margin-bottom: 10px; margin-top: 10px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;">
<span style="font-family: "arial"; overflow-wrap: break-word;">BIOS drive type selected at low-level (see table below)</span></div>
</td><td style="border: 0px; font: inherit; margin: 0px; overflow-wrap: break-word; padding: 6px; vertical-align: top;" valign="TOP" width="23%"><span style="font-family: "arial"; overflow-wrap: break-word;"></span><br />
<div align="CENTER" style="border: 0px; font: inherit; margin-bottom: 10px; margin-top: 10px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;">
<span style="font-family: "arial"; overflow-wrap: break-word;">W3 (5150x only)</span></div>
</td><td style="border: 0px; font: inherit; margin: 0px; overflow-wrap: break-word; padding: 6px; vertical-align: top;" valign="TOP" width="20%"><span style="font-family: "arial"; overflow-wrap: break-word;"></span><br />
<div align="CENTER" style="border: 0px; font: inherit; margin-bottom: 10px; margin-top: 10px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;">
<span style="font-family: "arial"; overflow-wrap: break-word;">open</span></div>
</td></tr>
<tr style="border: 0px; font: inherit; margin: 0px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;"><td style="border: 0px; font: inherit; margin: 0px; overflow-wrap: break-word; padding: 6px; vertical-align: top;" valign="TOP" width="3%">»</td><td style="border: 0px; font: inherit; margin: 0px; overflow-wrap: break-word; padding: 6px; vertical-align: top;" valign="TOP" width="58%"><span style="font-family: "arial"; overflow-wrap: break-word;"></span><br />
<div align="JUSTIFY" style="border: 0px; font: inherit; margin-bottom: 10px; margin-top: 10px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;">
<span style="font-family: "arial"; overflow-wrap: break-word;"></span><span style="font-family: "arial"; overflow-wrap: break-word;">Factory configured - do not alter</span></div>
</td><td style="border: 0px; font: inherit; margin: 0px; overflow-wrap: break-word; padding: 6px; vertical-align: top;" valign="TOP" width="23%"><span style="font-family: "arial"; overflow-wrap: break-word;"></span><br />
<div align="CENTER" style="border: 0px; font: inherit; margin-bottom: 10px; margin-top: 10px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;">
<span style="font-family: "arial"; overflow-wrap: break-word;">W2/jumper 4</span></div>
</td><td style="border: 0px; font: inherit; margin: 0px; overflow-wrap: break-word; padding: 6px; vertical-align: top;" valign="TOP" width="20%"><span style="font-family: "arial"; overflow-wrap: break-word;"></span><br />
<div align="CENTER" style="border: 0px; font: inherit; margin-bottom: 10px; margin-top: 10px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;">
<span style="font-family: "arial"; overflow-wrap: break-word;">open</span></div>
</td></tr>
</tbody></table>
<table border="" cellpadding="9" cellspacing="2" style="background-color: white; border-collapse: collapse; border-spacing: 0px; border: 0px; font-family: Arial, Helvetica, sans-serif; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; margin: 20px 5px; max-width: 100%; overflow-wrap: break-word; padding: 0px; table-layout: fixed; vertical-align: top; width: 522px;"><tbody style="border: 0px; font: inherit; margin: 0px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;">
<tr style="border: 0px; font: inherit; margin: 0px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;"><td bgcolor="#000000" colspan="4" style="border: 0px; font: inherit; margin: 0px; overflow-wrap: break-word; padding: 6px; vertical-align: top;" valign="TOP" width="100%"><span style="color: white; font-family: "arial"; font-size: x-small; overflow-wrap: break-word;"><span style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: 700; line-height: inherit; margin: 0px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;"></span></span><br />
<div align="CENTER" style="border: 0px; font: inherit; margin-bottom: 10px; margin-top: 10px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;">
<span style="color: white; font-family: "arial"; font-size: x-small; overflow-wrap: break-word;"><span style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: 700; line-height: inherit; margin: 0px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;">BIOS ADDRESS</span></span></div>
</td></tr>
<tr style="border: 0px; font: inherit; margin: 0px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;"><td style="border: 0px; font: inherit; margin: 0px; overflow-wrap: break-word; padding: 6px; vertical-align: top;" valign="TOP" width="25%"><span style="font-family: "arial"; overflow-wrap: break-word;"><span style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: 700; line-height: inherit; margin: 0px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;"></span></span><br />
<div align="CENTER" style="border: 0px; font: inherit; margin-bottom: 10px; margin-top: 10px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;">
<span style="font-family: "arial"; overflow-wrap: break-word;"><span style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: 700; line-height: inherit; margin: 0px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;">Address</span></span></div>
</td><td style="border: 0px; font: inherit; margin: 0px; overflow-wrap: break-word; padding: 6px; vertical-align: top;" valign="TOP" width="25%"><span style="font-family: "arial"; overflow-wrap: break-word;"><span style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: 700; line-height: inherit; margin: 0px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;"></span></span><br />
<div align="CENTER" style="border: 0px; font: inherit; margin-bottom: 10px; margin-top: 10px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;">
<span style="font-family: "arial"; overflow-wrap: break-word;"><span style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: 700; line-height: inherit; margin: 0px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;">W2/jumper 1</span></span></div>
</td><td style="border: 0px; font: inherit; margin: 0px; overflow-wrap: break-word; padding: 6px; vertical-align: top;" valign="TOP" width="25%"><span style="font-family: "arial"; overflow-wrap: break-word;"><span style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: 700; line-height: inherit; margin: 0px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;"></span></span><br />
<div align="CENTER" style="border: 0px; font: inherit; margin-bottom: 10px; margin-top: 10px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;">
<span style="font-family: "arial"; overflow-wrap: break-word;"><span style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: 700; line-height: inherit; margin: 0px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;">W2/jumper 2</span></span></div>
</td><td style="border: 0px; font: inherit; margin: 0px; overflow-wrap: break-word; padding: 6px; vertical-align: top;" valign="TOP" width="25%"><span style="font-family: "arial"; overflow-wrap: break-word;"><span style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: 700; line-height: inherit; margin: 0px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;"></span></span><br />
<div align="CENTER" style="border: 0px; font: inherit; margin-bottom: 10px; margin-top: 10px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;">
<span style="font-family: "arial"; overflow-wrap: break-word;"><span style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: 700; line-height: inherit; margin: 0px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;">W2/jumper 3</span></span></div>
</td></tr>
<tr style="border: 0px; font: inherit; margin: 0px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;"><td style="border: 0px; font: inherit; margin: 0px; overflow-wrap: break-word; padding: 6px; vertical-align: top;" valign="TOP" width="25%"><span style="font-family: "arial"; overflow-wrap: break-word;"></span><br />
<div align="CENTER" style="border: 0px; font: inherit; margin-bottom: 10px; margin-top: 10px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;">
<span style="font-family: "arial"; overflow-wrap: break-word;">disabled</span></div>
</td><td style="border: 0px; font: inherit; margin: 0px; overflow-wrap: break-word; padding: 6px; vertical-align: top;" valign="TOP" width="25%"><span style="font-family: "arial"; overflow-wrap: break-word;"></span><br />
<div align="CENTER" style="border: 0px; font: inherit; margin-bottom: 10px; margin-top: 10px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;">
<span style="font-family: "arial"; overflow-wrap: break-word;">open</span></div>
</td><td style="border: 0px; font: inherit; margin: 0px; overflow-wrap: break-word; padding: 6px; vertical-align: top;" valign="TOP" width="25%"><span style="font-family: "arial"; overflow-wrap: break-word;"></span><br />
<div align="CENTER" style="border: 0px; font: inherit; margin-bottom: 10px; margin-top: 10px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;">
<span style="font-family: "arial"; overflow-wrap: break-word;">-</span></div>
</td><td style="border: 0px; font: inherit; margin: 0px; overflow-wrap: break-word; padding: 6px; vertical-align: top;" valign="TOP" width="25%"><span style="font-family: "arial"; overflow-wrap: break-word;"></span><br />
<div align="CENTER" style="border: 0px; font: inherit; margin-bottom: 10px; margin-top: 10px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;">
<span style="font-family: "arial"; overflow-wrap: break-word;">-</span></div>
</td></tr>
<tr style="border: 0px; font: inherit; margin: 0px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;"><td style="border: 0px; font: inherit; margin: 0px; overflow-wrap: break-word; padding: 6px; vertical-align: top;" valign="TOP" width="25%"><span style="font-family: "arial"; overflow-wrap: break-word;"></span><br />
<div align="CENTER" style="border: 0px; font: inherit; margin-bottom: 10px; margin-top: 10px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;">
<span style="font-family: "arial"; overflow-wrap: break-word;">C8000</span></div>
</td><td style="border: 0px; font: inherit; margin: 0px; overflow-wrap: break-word; padding: 6px; vertical-align: top;" valign="TOP" width="25%"><span style="font-family: "arial"; overflow-wrap: break-word;"></span><br />
<div align="CENTER" style="border: 0px; font: inherit; margin-bottom: 10px; margin-top: 10px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;">
<span style="font-family: "arial"; overflow-wrap: break-word;">closed</span></div>
</td><td style="border: 0px; font: inherit; margin: 0px; overflow-wrap: break-word; padding: 6px; vertical-align: top;" valign="TOP" width="25%"><span style="font-family: "arial"; overflow-wrap: break-word;"></span><br />
<div align="CENTER" style="border: 0px; font: inherit; margin-bottom: 10px; margin-top: 10px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;">
<span style="font-family: "arial"; overflow-wrap: break-word;">closed</span></div>
</td><td style="border: 0px; font: inherit; margin: 0px; overflow-wrap: break-word; padding: 6px; vertical-align: top;" valign="TOP" width="25%"><span style="font-family: "arial"; overflow-wrap: break-word;"></span><br />
<div align="CENTER" style="border: 0px; font: inherit; margin-bottom: 10px; margin-top: 10px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;">
<span style="font-family: "arial"; overflow-wrap: break-word;">closed</span></div>
</td></tr>
<tr style="border: 0px; font: inherit; margin: 0px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;"><td style="border: 0px; font: inherit; margin: 0px; overflow-wrap: break-word; padding: 6px; vertical-align: top;" valign="TOP" width="25%"><span style="font-family: "arial"; overflow-wrap: break-word;"></span><br />
<div align="CENTER" style="border: 0px; font: inherit; margin-bottom: 10px; margin-top: 10px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;">
<span style="font-family: "arial"; overflow-wrap: break-word;">CA000</span></div>
</td><td style="border: 0px; font: inherit; margin: 0px; overflow-wrap: break-word; padding: 6px; vertical-align: top;" valign="TOP" width="25%"><span style="font-family: "arial"; overflow-wrap: break-word;"></span><br />
<div align="CENTER" style="border: 0px; font: inherit; margin-bottom: 10px; margin-top: 10px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;">
<span style="font-family: "arial"; overflow-wrap: break-word;">closed</span></div>
</td><td style="border: 0px; font: inherit; margin: 0px; overflow-wrap: break-word; padding: 6px; vertical-align: top;" valign="TOP" width="25%"><span style="font-family: "arial"; overflow-wrap: break-word;"></span><br />
<div align="CENTER" style="border: 0px; font: inherit; margin-bottom: 10px; margin-top: 10px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;">
<span style="font-family: "arial"; overflow-wrap: break-word;">closed</span></div>
</td><td style="border: 0px; font: inherit; margin: 0px; overflow-wrap: break-word; padding: 6px; vertical-align: top;" valign="TOP" width="25%"><span style="font-family: "arial"; overflow-wrap: break-word;"></span><br />
<div align="CENTER" style="border: 0px; font: inherit; margin-bottom: 10px; margin-top: 10px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;">
<span style="font-family: "arial"; overflow-wrap: break-word;">open</span></div>
</td></tr>
<tr style="border: 0px; font: inherit; margin: 0px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;"><td style="border: 0px; font: inherit; margin: 0px; overflow-wrap: break-word; padding: 6px; vertical-align: top;" valign="TOP" width="25%"><span style="font-family: "arial"; overflow-wrap: break-word;"></span><br />
<div align="CENTER" style="border: 0px; font: inherit; margin-bottom: 10px; margin-top: 10px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;">
<span style="font-family: "arial"; overflow-wrap: break-word;">D8000</span></div>
</td><td style="border: 0px; font: inherit; margin: 0px; overflow-wrap: break-word; padding: 6px; vertical-align: top;" valign="TOP" width="25%"><span style="font-family: "arial"; overflow-wrap: break-word;"></span><br />
<div align="CENTER" style="border: 0px; font: inherit; margin-bottom: 10px; margin-top: 10px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;">
<span style="font-family: "arial"; overflow-wrap: break-word;">closed</span></div>
</td><td style="border: 0px; font: inherit; margin: 0px; overflow-wrap: break-word; padding: 6px; vertical-align: top;" valign="TOP" width="25%"><span style="font-family: "arial"; overflow-wrap: break-word;"></span><br />
<div align="CENTER" style="border: 0px; font: inherit; margin-bottom: 10px; margin-top: 10px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;">
<span style="font-family: "arial"; overflow-wrap: break-word;">open</span></div>
</td><td style="border: 0px; font: inherit; margin: 0px; overflow-wrap: break-word; padding: 6px; vertical-align: top;" valign="TOP" width="25%"><span style="font-family: "arial"; overflow-wrap: break-word;"></span><br />
<div align="CENTER" style="border: 0px; font: inherit; margin-bottom: 10px; margin-top: 10px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;">
<span style="font-family: "arial"; overflow-wrap: break-word;">closed</span></div>
</td></tr>
<tr style="border: 0px; font: inherit; margin: 0px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;"><td style="border: 0px; font: inherit; margin: 0px; overflow-wrap: break-word; padding: 6px; vertical-align: top;" valign="TOP" width="25%"><span style="font-family: "arial"; overflow-wrap: break-word;"></span><br />
<div align="CENTER" style="border: 0px; font: inherit; margin-bottom: 10px; margin-top: 10px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;">
<span style="font-family: "arial"; overflow-wrap: break-word;">F4000</span></div>
</td><td style="border: 0px; font: inherit; margin: 0px; overflow-wrap: break-word; padding: 6px; vertical-align: top;" valign="TOP" width="25%"><span style="font-family: "arial"; overflow-wrap: break-word;"></span><br />
<div align="CENTER" style="border: 0px; font: inherit; margin-bottom: 10px; margin-top: 10px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;">
<span style="font-family: "arial"; overflow-wrap: break-word;">closed</span></div>
</td><td style="border: 0px; font: inherit; margin: 0px; overflow-wrap: break-word; padding: 6px; vertical-align: top;" valign="TOP" width="25%"><span style="font-family: "arial"; overflow-wrap: break-word;"></span><br />
<div align="CENTER" style="border: 0px; font: inherit; margin-bottom: 10px; margin-top: 10px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;">
<span style="font-family: "arial"; overflow-wrap: break-word;">open</span></div>
</td><td style="border: 0px; font: inherit; margin: 0px; overflow-wrap: break-word; padding: 6px; vertical-align: top;" valign="TOP" width="25%"><span style="font-family: "arial"; overflow-wrap: break-word;"></span><br />
<div align="CENTER" style="border: 0px; font: inherit; margin-bottom: 10px; margin-top: 10px; overflow-wrap: break-word; padding: 0px; vertical-align: baseline;">
<span style="font-family: "arial"; overflow-wrap: break-word;">open</span></div>
</td></tr>
</tbody></table>
So let's go to the card:<br />
<br />
Connectors: J1 and J2 have cables for a drive 0 (C: in DOS). J2 is empty as there is only one drive. The drive activity header J5 is unconnected, the install guide says this is for AT hard drives. And there is no further information on connecting to that header.<br />
<br />
For Block W2, there are only pins on positions 2, 3, and 4, and they are all closed. This puts the hard drive BIOS address at C800:0000.<br />
<br />
<h3>
Drive Type Table</h3>
<br />
The types of drives supported is hard coded into the card BIOS. Fortunately later BIOSes had a free form type. Here is the table from the install guide:<br />
<br />
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiCG6PD3GSWTSlZVMr1aa4EvPceKB7B70X2h3tpPfPWCLIEWV0k5ThBKU88ZgUjBox-PM14D9cbhOfUJ4n_C-OvTYes2y0uibifoAPY7sB9_YEsLuxjFqRzo7jUelDJJ_5tZdRjrU3Rvno/s1600/5160X+drive+types.JPG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="475" data-original-width="499" height="378" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiCG6PD3GSWTSlZVMr1aa4EvPceKB7B70X2h3tpPfPWCLIEWV0k5ThBKU88ZgUjBox-PM14D9cbhOfUJ4n_C-OvTYes2y0uibifoAPY7sB9_YEsLuxjFqRzo7jUelDJJ_5tZdRjrU3Rvno/s400/5160X+drive+types.JPG" width="400" /></a></div>
I'll backfill what type of hard drive is found.<br />
<h3>
</h3>
<h3>
Hard Drive Controller BIOS Chip</h3>
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjUsW_JPr4HK1NEP5J3gljcIPejXKmckwjkGjOv8xKo8KR7I2vl9Y33BSoOgSmZaTW4e20T9OxeSIlTPmmAgjgkPdPDBL18qp-dTKvTzaj-MhcqZ4x6kPg9GCaP4JmSY19W3Yga1i9ycpQ/s1600/BIOS+Chip+HD+Controller.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="500" data-original-width="1079" height="148" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjUsW_JPr4HK1NEP5J3gljcIPejXKmckwjkGjOv8xKo8KR7I2vl9Y33BSoOgSmZaTW4e20T9OxeSIlTPmmAgjgkPdPDBL18qp-dTKvTzaj-MhcqZ4x6kPg9GCaP4JmSY19W3Yga1i9ycpQ/s320/BIOS+Chip+HD+Controller.png" width="320" /></a></div>
<br />
The BIOS chip agrees with the documentation as a 5160X, having a CRD prefix. This would be BIOS rev 19A.<br />
<br />
REVISION HISTORY: DTC5160x<br />
<br />
Rev. Date Description<br />
<br />
A 06-17-88 Initial release<br />
B 08-08-88 AT LED connector<br />
C 10-05-88 BIOS address jumpers<br />
D 01-10-89 CXD23A BIOS<br />
<br />
The board rev is D but the value doesn't match CXD23A. It may be a rev C BIOS.<br />
<br />
Finally, the documentation says:<br />
<blockquote class="tr_bq">
<span style="background-color: white; font-family: "arial"; font-size: 13px; text-align: -webkit-center;">This controller has a built-in, low-level format program. To enter the program run the DEBUG utility supplied with DOS and at the prompt enter: G=C800:5.</span></blockquote>
Which is helpful as if the drive needs to be initialize, that information is needed.<br />
<br />
<h3>
PC BIOS Support</h3>
Via minuszerodegrees.net:<br />
<br />
<blockquote class="tr_bq">
<span style="background-color: #cacecb; font-family: "verdana" , "arial" , "helvetica" , sans-serif; font-size: 12px;"><b>Early 1983</b>, some significant events occurred. The IBM 5160 (IBM XT) and DOS 2.0 were released, and they supported hard drives. The BIOS on the 5160 motherboard introduced support for BIOS expansion ROMs, and so now it was possible for a hard drive controller card to have its supporting BIOS located within a ROM on the card.</span><br />
<br style="font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 12px;" />
<span style="background-color: #cacecb; font-family: "verdana" , "arial" , "helvetica" , sans-serif; font-size: 12px;">About this time is when a new revision of motherboard BIOS appeared for the IBM 5150, the </span><a href="http://www.minuszerodegrees.net/5150/bios/5150_bios_revisions.htm" style="font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 12px;">10/27/82</a><span style="background-color: #cacecb; font-family: "verdana" , "arial" , "helvetica" , sans-serif; font-size: 12px;"> revision, and it too had support for BIOS expansion ROMs.</span><br />
<br style="font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 12px;" />
<span style="background-color: #cacecb; font-family: "verdana" , "arial" , "helvetica" , sans-serif; font-size: 12px;">So at this time, someone with a 10/27/82 BIOS equipped IBM 5150 could fit an XT-class hard disk controller, a hard drive, and run DOS 2 - all that would need to be worried about was whether or not the 5150's 63W power supply was going to be adequate for the task. But at the time, it was not adequate (due to the power requirements of current hard drives). It is the reason why IBM put a 130W power supply in the 5160. The diagram at </span><a href="http://www.minuszerodegrees.net/5160/misc/5160_startup_power_+12V.jpg" style="font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 12px;">here</a><span style="background-color: #cacecb; font-family: "verdana" , "arial" , "helvetica" , sans-serif; font-size: 12px;"> shows that the +12V start-up power requirement of the Seagate ST-412 easily exceeds the +12V power </span><a href="http://www.minuszerodegrees.net/5150/psu/5150_psu_line_ratings.htm" style="font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 12px;">rating</a><span style="background-color: #cacecb; font-family: "verdana" , "arial" , "helvetica" , sans-serif; font-size: 12px;"> (24W) of the 5150's 63W power supply.</span><br />
<br style="font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 12px;" />
<span style="background-color: #cacecb; font-family: "verdana" , "arial" , "helvetica" , sans-serif; font-size: 12px;">At this time is when IBM offered a hard drive solution for the IBM 5150. It was the attachment of an IBM 5161 expansion unit (one that contained a hard drive and controller) to the 5150.</span><br />
<br style="font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 12px;" />
<br style="font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 12px;" />
<span class="styPageType1_heading_L3" style="font-family: "verdana" , "arial" , "helvetica" , sans-serif; font-size: 13px; font-weight: bold;">POST 1983</span><br />
<br style="font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 12px;" />
<span style="background-color: #cacecb; font-family: "verdana" , "arial" , "helvetica" , sans-serif; font-size: 12px;">Hard drives became physically smaller, and their power requirements smaller. Therefore, the 5150's 63W power supply becomes less of an issue. For example, it is reported that a Seagate ST-225 works okay with the 63W power supply.</span></blockquote>
<br />
It appears the PC has a replacement 125 watt power supply, still uncertain though. I would think the vintage is older than 10/1982 so it should have a compatible BIOS and work with DOS 2 or higher. Having seen this PC in operation under DOS 4, things seem ok.<br />
<br />
I still need to determine the BIOS date, I'll need to reassemble and reboot I think. The chips I believe are the BIOS have a big 17 on them and a smaller 20.<br />
<h3>
<br />Final Thoughts</h3>
<br />
Having a hard drive was a BIG THING in the 1980s, at least for a home computer. It was a popular add-on for PC owners looking at their AT-owning friends. I myself got a 30MB RLL drive for my Compaq DeskPro as an add-on, like this computer. Boot times improved and oh, the storage, no floppy swapping. Who could ever fill a 30MB drive? There were no MP3s, videos, etc.<br />
<br />Anne Barelahttp://www.blogger.com/profile/15220828568926183065noreply@blogger.com0tag:blogger.com,1999:blog-3086558728571967180.post-47006262538290890462019-01-22T21:52:00.002-05:002019-01-23T22:02:35.177-05:00The IBM PC 5150: Part 6 - The choc' full AST multifunction card<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgIRLJFrnp4FpAcvxnCVB6sCnXQxcaFwzvP3YEWZ26UqY-bK0XpeW9EgXnKsaTpf-LYu2mK8F23Yvqg-cf-gi0JcHpT36qYFo7afA_9A07F1fMfywUBI-0rm8wQqSaXQ_Tw2HGaan-frCA/s1600/ast-sixpackplus-full.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="589" data-original-width="1600" height="234" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgIRLJFrnp4FpAcvxnCVB6sCnXQxcaFwzvP3YEWZ26UqY-bK0XpeW9EgXnKsaTpf-LYu2mK8F23Yvqg-cf-gi0JcHpT36qYFo7afA_9A07F1fMfywUBI-0rm8wQqSaXQ_Tw2HGaan-frCA/s640/ast-sixpackplus-full.jpg" width="640" /></a></div>
<br />
<a href="https://21stdigitalhome.blogspot.com/2019/01/the-ibm-pc-5150-part-5-mystery-video.html" target="_blank">Continuing my blog series</a> on the IBM PC 5150 I bought off Craigslist, we come to the third expansion card in the unit, a "full-length" multifunction expansion card.<br />
<br />
<h3>
Multi cards were important for a number of reasons:</h3>
<ol>
<li>The original IBM PC relied on 5 expansion card slots for additional functionality.</li>
<li>Expanding the memory on the IBM PC 5150 PC-2 (64-256K) motherboard beyond 256K required an add-in card for the other 384K to get to 640K of memory.</li>
<li>The IBM PC, like the Raspberry Pi, has a system clock but no real time clock (RTC) module so the time must be entered manually on boot unless an RTC is added.</li>
<li>The IBM PC didn't have serial, joystick, or parallel ports on the motherboard.</li>
</ol>
<div>
In theory, an individual card could be used for each function, but with only 5 expansion slots, it would be impractical - relaying on the expensive expansion case that no one ever got.</div>
<div>
<br /></div>
<div>
Thus, multifunction cards came out and the king of the hill in this sector was AST Research, Inc. of Irvine, California. They had success with IBM add-in cards, especially expansion cards providing multiple functions on one card.</div>
<div>
<br /></div>
<div>
This card was typical of a usually expensive purchase: the AST SixPackPlus. This card can provide the following functions:</div>
<div>
<ol>
<li>One 25 pin D male connector on the card bracket as a serial RS-232 port.</li>
<li>One 25 pin D female connector connected by ribbon cable to header J2, top center as a parallel printer port.</li>
<li>One 15 pin D female connector connected by ribbon cable to header J3, upper right, for a joystick controller "game adapter".</li>
<li>A real-time clock module with 3V BR2325 battery for backup when PC was off.</li>
<li>Expansion memory in 6 vertical banks of 64K up to 384K total</li>
<li>where is the 6th feature, plus? we'll have to see.</li>
</ol>
<div>
Fortunately, the manual for this card is still <a href="http://minuszerodegrees.net/manuals/AST_SixPakPlus_LONG_Users_Manual.pdf" target="_blank">available online here</a> dated June 1983. Here is the layout from the manual:</div>
</div>
<div class="separator" style="clear: both; text-align: center;">
<a href="https://4.bp.blogspot.com/-q7-i2zxkEKs/XEfSPgK5sGI/AAAAAAAAVbA/v2fPephw_BAPad0GTyqR5Mimc_O_RcC-gCLcBGAs/s1600/ast-sixpackplus-layout-diagram.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="808" data-original-width="1600" height="322" src="https://4.bp.blogspot.com/-q7-i2zxkEKs/XEfSPgK5sGI/AAAAAAAAVbA/v2fPephw_BAPad0GTyqR5Mimc_O_RcC-gCLcBGAs/s640/ast-sixpackplus-layout-diagram.jpg" width="640" /></a></div>
<div>
On the side of my card it says the board is a Revision J which differs from the manual (probably Revision A). The main thing is the battery holder is at the bottom of the card and not at the top like in the diagram.</div>
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgJueTPjdpRS57YT-xIPHo_rwj2Gg4Q1C_mOxHXUlhyphenhyphenMyJff-Lhj4BwXfow6_W5As2ZU5OUI3AyVyXQey8GWW728KjZmbgMX7v8uP4FZbeYnMDexOTL9AuyHMdogUWQS6poCGly2GNU-08/s1600/ast-board-rev.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="674" data-original-width="1600" height="268" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgJueTPjdpRS57YT-xIPHo_rwj2Gg4Q1C_mOxHXUlhyphenhyphenMyJff-Lhj4BwXfow6_W5As2ZU5OUI3AyVyXQey8GWW728KjZmbgMX7v8uP4FZbeYnMDexOTL9AuyHMdogUWQS6poCGly2GNU-08/s640/ast-board-rev.jpg" width="640" /></a></div>
<div>
<br /></div>
<div>
<h3>
Memory Expansion</h3>
This card is fully loaded with memory, with Banks 2-6 containing 9 NEC D4164C 15 ns RAM chips each. In this card, Bank 1 contains 9 TI TMS4164-15NLJ chips, code GBY (triangle) 614 09. Both of these brands are different from the motherboard RAM which likely suggests the card perhaps came with Bank 1 populated or it was the first Bank purchased and the other memory purchased later. Further inspection finds Banks 2 & 3 have the code 8604RY008 and Banks 4-6 have the code 8516RU708. So the date of installation on the RAM banks is most likely:</div>
<div>
<ul>
<li>Bank 1</li>
<li>Banks 2 and 3</li>
<li>Banks 4, 5, and 6</li>
</ul>
</div>
<div>
RAM wasn't inexpensive at the time so upgrading piecemeal was expected, as long as it was 9 chips at a time (8 bits plus one parity bit).<br />
<h3>
<br /></h3>
<h3>
Ports</h3>
The original owner had not used the Parallel Port (using the single function card previously reviewed). The Game Adapter was hanging out the back precariously.</div>
<div>
<h3>
<br /></h3>
<h3>
Real-time Clock</h3>
Having booted the PC, I was aware the RTC was not functioning. All too common that the 3V battery was depleted. Finding a replacement BR2325 has been hard, it wasn't even at Batteries and Bulbs. That battery is a bit bigger in diameter than the more typical CR2032 which I may try in a pinch before mail-ordering a replacement as the contacts are strips in the center instead of having anything on the edges. See below.<br />
<br /></div>
<div>
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgAtPYjIBhvP2u6Xz58FHQpj-GooCLFzhodCULVwnDEP5rUhbvd1_xYNbX0SjB19kd8G5a1KjlxUFbk1YFR3kJxPBwyUmbFmYECrHHYDdD7U40f3t8Iwt_A5zANmGhTtjljUNLy2plrq5w/s1600/clock-jumpers.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1600" data-original-width="1279" height="640" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgAtPYjIBhvP2u6Xz58FHQpj-GooCLFzhodCULVwnDEP5rUhbvd1_xYNbX0SjB19kd8G5a1KjlxUFbk1YFR3kJxPBwyUmbFmYECrHHYDdD7U40f3t8Iwt_A5zANmGhTtjljUNLy2plrq5w/s640/clock-jumpers.jpg" width="510" /></a></div>
<h3>
Jumper Settings</h3>
</div>
<div>
There are port enable jumpers at the bottom of the card near the ISA slot interface in the above picture. The definition of the port jumpers are (by reading fragments of <a href="http://minuszerodegrees.net/manuals/AST_SixPakPlus_LONG_Users_Manual.pdf" target="_blank">the manual</a>):<br />
<br />
Port 1 Jumper: Onboard Serial Port is COM1 (I/O Ports 3F8-3FF)<br />
Port 2 Jumper: Onboard Serial Port is COM2 (I/O Ports 2F8-2FF)<br />
Port 3 Jumper: Onboard Parallel Header J2 is LPT1 (I/O Ports 378-37A)<br />
Port 4 Jumper: Onboard Parallel Header J2 is LPT2 (I/O Ports 278-27A)<br />
Port 5 Jumper: Enable Game Port on Header J3 (I/O Port 201)<br />
Port 6 Jumper: Enable Real-time Clock (RTC) (I/O Ports 2C0-2DF)<br />
<br />
If an IBM Monochrome Display Adapter is present, Port 3 shifts to LPT2 and Port 4 to LPT3<br />
<br />
So for this card, the COM port is enabled as COM1, the Game Port is active and the RTC is enabled. The parallel printer port is disabled and that aligns with the port not being used when the PC was purchased. Thankfully I have the original cable in the "bag o' parts" I received. If there an expansion card bracket with a DB25 cutout for the parallel port, I did not receive it but I probably have a spare in my parts.<br />
<h3>
<br /></h3>
<h3>
Switch Settings</h3>
I'll go through the switches per the manual. Switch positions 1-3: Memory<br />
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhYRGSNyNh8_n6xse2Cmm_4jKu-jP2ZaurY5XT7mPOmnVRBtNsJlCJduEJ_1NfAxKjwDkg_9rjY53XSinpIjNNk2vjucTSoWohoAyUXU2ujqSuzAvmiz0gieMMrJ7BMgwFtyHyOBF86JDU/s1600/Switch1.JPG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="405" data-original-width="627" height="412" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhYRGSNyNh8_n6xse2Cmm_4jKu-jP2ZaurY5XT7mPOmnVRBtNsJlCJduEJ_1NfAxKjwDkg_9rjY53XSinpIjNNk2vjucTSoWohoAyUXU2ujqSuzAvmiz0gieMMrJ7BMgwFtyHyOBF86JDU/s640/Switch1.JPG" width="640" /></a></div>
My switches are OFF ON ON, starting the memory at 256K. This aligns with the 384K onboard and the 256K on the motherboard. All good. Now Switch Positions 4-6:<br />
<br />
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjmBCP-lhFWKv-wD1w0nabWkJhfMTExzS7k4yMI4mH6WnUOezTgCqjdDrAhjbjpC-wmudbYqZA5gPqq7JTUHwBRGtWDate_6sCKn4pgISmQMVwCjC9enb94PdH-7pr7OCWPO8A5vcvycrs/s1600/Switch2.JPG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="370" data-original-width="601" height="394" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjmBCP-lhFWKv-wD1w0nabWkJhfMTExzS7k4yMI4mH6WnUOezTgCqjdDrAhjbjpC-wmudbYqZA5gPqq7JTUHwBRGtWDate_6sCKn4pgISmQMVwCjC9enb94PdH-7pr7OCWPO8A5vcvycrs/s640/Switch2.JPG" width="640" /></a></div>
The 5150 has switches set for ON ON OFF, for 6 banks, which is exactly what is populated on the board. All good. Switch Position 8:<br />
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjqqfkGiCMN56FRoiGGceuZBmDXsGhcxMhtrPkHn-NUCsbJiBAtxhJ5jxbFlgDH-gFEhFT2H4B3PXAlphaSgBJTCF2WFDvuyigz5wb9fRTVPHgz9eAVpcZxsCwNJabTCucv9KZWzYFFlOw/s1600/Switch3.JPG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="237" data-original-width="379" height="250" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjqqfkGiCMN56FRoiGGceuZBmDXsGhcxMhtrPkHn-NUCsbJiBAtxhJ5jxbFlgDH-gFEhFT2H4B3PXAlphaSgBJTCF2WFDvuyigz5wb9fRTVPHgz9eAVpcZxsCwNJabTCucv9KZWzYFFlOw/s400/Switch3.JPG" width="400" /></a></div>
On this PC, switch 8 is ON so parity is used.<br />
<br />
I don't see any setting in the manual for Switch Position 7. It is OFF on this PC's card.<br />
<br />
I've beat this cards features to death. Next will come the floppy controller card.</div>
Anne Barelahttp://www.blogger.com/profile/15220828568926183065noreply@blogger.com0tag:blogger.com,1999:blog-3086558728571967180.post-25595298409573569002019-01-21T20:05:00.003-05:002019-01-21T20:34:03.754-05:00The IBM PC 5150: Part 5 - The mystery video card<div class="separator" style="clear: both; text-align: center;">
<a href="https://2.bp.blogspot.com/-ilDR5WUlOiY/XEUWg4U2GJI/AAAAAAAAVZE/mqgxWqthi4YcxIJ5E4zMU6V-4_wJZO7cgCLcBGAs/s1600/CGA%2Bfull%2Bfront%2Bview.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="635" data-original-width="1600" height="254" src="https://2.bp.blogspot.com/-ilDR5WUlOiY/XEUWg4U2GJI/AAAAAAAAVZE/mqgxWqthi4YcxIJ5E4zMU6V-4_wJZO7cgCLcBGAs/s640/CGA%2Bfull%2Bfront%2Bview.jpg" width="640" /></a></div>
Ok, <a href="https://21stdigitalhome.blogspot.com/2019/01/the-ibm-pc-5150-part-4-expansion-card.html" target="_blank">continuing from the first expansion card investigated</a>, here is the second, the display adapter. We know the card is a <a href="https://en.wikipedia.org/wiki/Color_Graphics_Adapter" target="_blank">Color Graphics Array</a> (CGA) compatible card as it drives the IBM 5153 CGA monitor with the system. The card has a 9 pin D female connector and two RCA jacks.<br />
<br />
<a href="http://www.minuszerodegrees.net/5150_5160/cards/5150_5160_cards.htm" target="_blank">Comparing this to the official IBM board</a>, <u>this is not an IBM board</u>. Wow. The card is not an IBM monochrome display card either. It kinda looks like an EGA card from the bracket but it isn't the IBM EGA adapter.<br />
<br />
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEicBzRxnR2ZDjlQBTgs2ctORI-eT0YMV9hWdjLW1g2VcS4KRhZhi8gr9m87rn9QR9Xer2Zqhm5W07_6v8GCpUQniG-sr2gSLFcL7wdZeYBRgVXuwiNjJtOxBMGqvPHagTzBvFLZWBLWISg/s1600/CGA+bracket+crop.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="624" data-original-width="1600" height="248" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEicBzRxnR2ZDjlQBTgs2ctORI-eT0YMV9hWdjLW1g2VcS4KRhZhi8gr9m87rn9QR9Xer2Zqhm5W07_6v8GCpUQniG-sr2gSLFcL7wdZeYBRgVXuwiNjJtOxBMGqvPHagTzBvFLZWBLWISg/s640/CGA+bracket+crop.jpg" width="640" /></a></div>
<br />
There are few markings. The back has zero markings, the front has Made in Taiwan and C0637 near the ISA connector and Micro 007 OK in the upper left.<br />
<br />
Looking for competitors, it isn't a <a href="https://en.wikipedia.org/wiki/Hercules_Graphics_Card" target="_blank">Hercules Graphics card</a> which came out in 1984 and was popular.<br />
<br />
Note the card has a Motorola second source UM <a href="http://mirror.thelifeofkenneth.com/lib/electronics_archive/Umc-ComputerIcsDataBook1990-1991_text.pdf" target="_blank">6845R</a> display chip, helping to verify a CGA heritage - <a href="https://en.wikipedia.org/wiki/Enhanced_Graphics_Adapter" target="_blank">EGA cards</a> have more large chips.<br />
<br />
Forum posts <a href="https://www.vogons.org/viewtopic.php?f=46&t=60383" target="_blank">here</a>, <a href="https://www.vogons.org/viewtopic.php?f=63&t=58243" target="_blank">here</a>, <a href="http://www.vcfed.org/forum/showthread.php?47084-Trixter-s-latest-magic-Holy-how-in-the-hell!!!/page12" target="_blank">here</a>, and <a href="http://www.vcfed.org/forum/showthread.php?64736-CGA-card-with-dual-composite-output" target="_blank">here</a> keep trying to identify the card and the precise (no pun intended) functions of the RCA jacks. One for color, one for B/W?<br />
<br />
Help came from Dave Astels looking on the fabulous graphics card site <a href="http://www.vgamuseum.info/">http://www.vgamuseum.info</a>.<br />
<a href="http://www.vgamuseum.info/index.php/cpu/item/469-umc-um6845r" target="_blank">This page</a> has the closest picture, identifying the card as a UMC UM6845R CGA.<br />
<br />
<ul style="background-color: white; color: #333333; font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 13px; list-style: none; margin: 0px; padding: 0px;">
<li class="even typeSelect group1" style="background: rgb(230, 230, 229); border-bottom: 1px dotted rgb(204, 204, 204); display: block; line-height: 18px; overflow-wrap: break-word; padding: 2px;"><span class="itemExtraFieldsLabel" style="display: block; float: left; font-weight: bold; margin: 0px 4px 0px 0px; width: 504.875px;">Made by:</span><span class="itemExtraFieldsValue">UMC</span></li>
<li class="odd typeLabels group1" style="background-attachment: initial; background-clip: initial; background-image: initial; background-origin: initial; background-position: initial; background-repeat: initial; background-size: initial; border-bottom: 1px dotted rgb(204, 204, 204); display: block; line-height: 18px; overflow-wrap: break-word; padding: 2px;"><span class="itemExtraFieldsLabel" style="display: block; float: left; font-weight: bold; margin: 0px 4px 0px 0px; width: 504.875px;">Codename:</span><span class="itemExtraFieldsValue"><a href="http://www.vgamuseum.info/index.php/cpu/itemlist/search?searchword=UM6845R" style="color: #050505; text-decoration-line: none;">UM6845R</a></span></li>
<li class="even typeMultipleSelect group1" style="background: rgb(230, 230, 229); border-bottom: 1px dotted rgb(204, 204, 204); display: block; line-height: 18px; overflow-wrap: break-word; padding: 2px;"><span class="itemExtraFieldsLabel" style="display: block; float: left; font-weight: bold; margin: 0px 4px 0px 0px; width: 504.875px;">Bus:</span><span class="itemExtraFieldsValue">ISA 8bit</span></li>
<li class="odd typeMultipleSelect group1" style="background-attachment: initial; background-clip: initial; background-image: initial; background-origin: initial; background-position: initial; background-repeat: initial; background-size: initial; border-bottom: 1px dotted rgb(204, 204, 204); display: block; line-height: 18px; overflow-wrap: break-word; padding: 2px;"><span class="itemExtraFieldsLabel" style="display: block; float: left; font-weight: bold; margin: 0px 4px 0px 0px; width: 504.875px;">Memory Size:</span><span class="itemExtraFieldsValue">16kB</span></li>
<li class="even typeTextfield group1" style="background: rgb(230, 230, 229); border-bottom: 1px dotted rgb(204, 204, 204); display: block; line-height: 18px; overflow-wrap: break-word; padding: 2px;"><span class="itemExtraFieldsLabel" style="display: block; float: left; font-weight: bold; margin: 0px 4px 0px 0px; width: 504.875px;">Max Memory Size:</span><span class="itemExtraFieldsValue">16kB</span></li>
<li class="odd typeMultipleSelect group1" style="background-attachment: initial; background-clip: initial; background-image: initial; background-origin: initial; background-position: initial; background-repeat: initial; background-size: initial; border-bottom: 1px dotted rgb(204, 204, 204); display: block; line-height: 18px; overflow-wrap: break-word; padding: 2px;"><span class="itemExtraFieldsLabel" style="display: block; float: left; font-weight: bold; margin: 0px 4px 0px 0px; width: 504.875px;">Memory Type:</span><span class="itemExtraFieldsValue">DRAM</span></li>
<li class="even typeMultipleSelect group1" style="background: rgb(230, 230, 229); border-bottom: 1px dotted rgb(204, 204, 204); display: block; line-height: 18px; overflow-wrap: break-word; padding: 2px;"><span class="itemExtraFieldsLabel" style="display: block; float: left; font-weight: bold; margin: 0px 4px 0px 0px; width: 504.875px;">Card Type:</span></li>
<li class="odd typeMultipleSelect group1" style="background-attachment: initial; background-clip: initial; background-image: initial; background-origin: initial; background-position: initial; background-repeat: initial; background-size: initial; border-bottom: 1px dotted rgb(204, 204, 204); display: block; line-height: 18px; overflow-wrap: break-word; padding: 2px;"><span class="itemExtraFieldsLabel" style="display: block; float: left; font-weight: bold; margin: 0px 4px 0px 0px; width: 504.875px;">Outputs:</span><span class="itemExtraFieldsValue">9 pin D‐sub, RCA/CINCH</span></li>
<li class="even typeTextfield group1" style="background: rgb(230, 230, 229); border-bottom: 1px dotted rgb(204, 204, 204); display: block; line-height: 18px; overflow-wrap: break-word; padding: 2px;"><span class="itemExtraFieldsLabel" style="display: block; float: left; font-weight: bold; margin: 0px 4px 0px 0px; width: 504.875px;">Power consumption (W):</span><span class="itemExtraFieldsValue">0.65</span></li>
<li class="even typeTextfield group1" style="background: rgb(230, 230, 229); border-bottom: 1px dotted rgb(204, 204, 204); display: block; line-height: 18px; overflow-wrap: break-word; padding: 2px;"><span class="itemExtraFieldsLabel" style="display: block; float: left; font-weight: bold; margin: 0px 4px 0px 0px; width: 504.875px;">Core Clock (MHz):</span><span class="itemExtraFieldsValue">1</span></li>
<li class="even typeLabels group1" style="background: rgb(230, 230, 229); border-bottom: 1px dotted rgb(204, 204, 204); display: block; line-height: 18px; overflow-wrap: break-word; padding: 2px;"><span class="itemExtraFieldsLabel" style="display: block; float: left; font-weight: bold; margin: 0px 4px 0px 0px; width: 504.875px;">Sold by:</span><span class="itemExtraFieldsValue"><a href="http://www.vgamuseum.info/index.php/cpu/itemlist/search?searchword=Precise" style="color: #050505; text-decoration-line: none;">Precise</a></span></li>
</ul>
<br />
Ok, so the manufacturer is UMC, Unicorn Microelectronics Corp, Santa Clara, CA USA, later sold to <a href="https://en.wikipedia.org/wiki/UMC_(company)" target="_blank">UMC United Microelectronics Corp</a>., Taiwan. <a href="https://books.google.com/books?id=mJvWdaWc3Z0C&pg=PA170&lpg=PA170&dq=Unicorn+Microelectronics+Corp&source=bl&ots=wLz4C0XQhe&sig=ACfU3U3hxMIIXlx_k8JGTlXloIp8MgerTA&hl=en&sa=X&ved=2ahUKEwiKmM-4joDgAhXBJt8KHavoBc8Q6AEwB3oECAEQAQ#v=onepage&q=Unicorn%20Microelectronics%20Corp&f=false" target="_blank">See this book</a> for some info on the acquisition. It seems this pair of companies have had issues, from chip manufacturing to <a href="https://www.upi.com/Archives/1994/01/11/Nintendo-United-Microelectronics-settle-suit/9249758264400/" target="_blank">counterfeit Nintendo video games</a>.<br />
<br />
According to a <a href="http://mirror.thelifeofkenneth.com/lib/electronics_archive/Umc-ComputerIcsDataBook1990-1991_text.pdf" target="_blank">UMC data book</a> (who remembers these?!?!) from 1990, page 3-68, UMC made the UM6845R CRT controller, the one on the board.<br />
<br />
The cards were sold by Precise according to two sources. I did get a hit for Precise on <a href="http://precise%20445%20um6845r%20mda/CGA%20ISA%20Video%20Card%2016Kb%20Memory" target="_blank">this South African sales site</a>, listing it as a Precise 445 and saying it is CGA and MDA compatible (like a Hercules) which would be amazing but I seriously doubt this. Further searching for a Precise or 445 graphics card turned up zero.<br />
<br />
I found <a href="http://www.oldskool.org/pc/cgacomp" target="_blank">CGA card compatibility tester</a> software on the Oldskool PC web site that might be handy later<br />
<br />
The output RCA connectors are marked J4 and J5. With no other connectors/jumpers, the 9 pin D female CGA out must be J1.<br />
<br />
J2 may be a composite video breakout and J3 a light pen interface per the official IBM CGA card per <a href="https://www.seasip.info/VintagePC/cga.html" target="_blank">this page</a>. As I'm not interested to get that far in the weeds, I'll leave that for another time or person.<br />
<br />
Ok, anyone have some manufacturing or sales info? I'd really like to know if this card was put in by the reseller who was an IBM dealer (likely) or maybe replaced later. And why this card? Cost?<br />
<br />Anne Barelahttp://www.blogger.com/profile/15220828568926183065noreply@blogger.com0tag:blogger.com,1999:blog-3086558728571967180.post-32091025480362000472019-01-20T19:32:00.000-05:002019-01-21T20:32:51.267-05:00The IBM PC 5150: Part 4 - Expansion Card Exploration: the Parallel Card<div class="separator" style="clear: both; text-align: center;">
<a href="https://4.bp.blogspot.com/-xOxgifQQT-c/XETnWNE0qsI/AAAAAAAAVXM/FcPhPjsckggwnLGcknCVrpTScxqkonsggCEwYBhgL/s1600/Cards.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1039" data-original-width="1600" height="414" src="https://4.bp.blogspot.com/-xOxgifQQT-c/XETnWNE0qsI/AAAAAAAAVXM/FcPhPjsckggwnLGcknCVrpTScxqkonsggCEwYBhgL/s640/Cards.jpg" width="640" /></a></div>
<br />
<a href="https://21stdigitalhome.blogspot.com/2019/01/the-ibm-pc-5150-cpu-and-fpu.html" target="_blank">Continuing to explore</a> an IBM PC 5150 I got on Craigslist, we've already had surprises. One was that all 5 card slots were filled with hardware (and not just knockouts or a port on a bracket).<br />
<br />
I'll start easy. The one at the top of this picture is a now out. Photos:<br />
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhWRRUYMSXxnXQV_2_OovpHoe7ejTY1e5GZ2Baqwl3FTtuA7TgD6bcCHZ8lTCEW2KJ8GGaf-IMwDjxvRdPRnGWnI-67Ne9m3pBVLNyc5BBQwLKIC0CGeQRxrtz-qmEWRJ-k1tvmiaBDczo/s1600/20190120_182344.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1600" data-original-width="1200" height="640" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhWRRUYMSXxnXQV_2_OovpHoe7ejTY1e5GZ2Baqwl3FTtuA7TgD6bcCHZ8lTCEW2KJ8GGaf-IMwDjxvRdPRnGWnI-67Ne9m3pBVLNyc5BBQwLKIC0CGeQRxrtz-qmEWRJ-k1tvmiaBDczo/s640/20190120_182344.jpg" width="480" /></a></div>
<br />
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhAi2pw1HG_Dz2HJiQzw9j3Cgv6W2OxI92t-wRcwd-6TJGG22B1791r5MEpyZTOXjZrQCi7zoi2Ky7YgDXnG4nxGbBtlj455yNaeC-hjRDtv6Ewgt0luhS5mhzYrju4KCvW2wnGKyqxxJg/s1600/20190120_182557.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1600" data-original-width="1200" height="640" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhAi2pw1HG_Dz2HJiQzw9j3Cgv6W2OxI92t-wRcwd-6TJGG22B1791r5MEpyZTOXjZrQCi7zoi2Ky7YgDXnG4nxGbBtlj455yNaeC-hjRDtv6Ewgt0luhS5mhzYrju4KCvW2wnGKyqxxJg/s640/20190120_182557.jpg" width="480" /></a></div>
<div class="separator" style="clear: both; text-align: center;">
<br /></div>
<div class="separator" style="clear: both; text-align: left;">
This is not an official IBM card. An example of the more generic add-ons available after a few years for PCs because early on there were only a few cards and they came from known sources.</div>
<div class="separator" style="clear: both; text-align: left;">
<br /></div>
<div class="separator" style="clear: both; text-align: left;">
It's easy to deduce this is a parallel port card (as it says on the chip side. Parallel, or printer ports, are characterized by a female DB25 connector for PC. One typically had a multiconductor cable with one end having a male DB25 and the other some sort of configuration but most likely a Centronics connector. </div>
<div class="separator" style="clear: both; text-align: left;">
<br /></div>
<div class="separator" style="clear: both; text-align: left;">
More info is on <a href="https://en.wikipedia.org/wiki/Parallel_port" target="_blank">Wikipedia</a> (of course): </div>
<blockquote class="tr_bq" style="clear: both; text-align: left;">
<div style="background-color: white; color: #222222; font-family: sans-serif; font-size: 14px; line-height: inherit; margin-bottom: 0.5em; margin-top: 0.5em;">
There are many types of parallel ports, but the term has become most closely associated with the <b>printer port</b> or <a href="https://en.wikipedia.org/wiki/Parallel_port#Centronics" style="background: none; color: #0b0080; text-decoration-line: none;" title="Parallel port">Centronics port</a> found on most <a href="https://en.wikipedia.org/wiki/Personal_computer" style="background: none; color: #0b0080; text-decoration-line: none;" title="Personal computer">personal computers</a> from the 1970s through the 2000s. It was an industry <a href="https://en.wikipedia.org/wiki/De_facto_standard" style="background: none; color: #0b0080; text-decoration-line: none;" title="De facto standard"><i>de facto</i> standard</a> for many years, and was finally standardized as <a href="https://en.wikipedia.org/wiki/IEEE_1284" style="background: none; color: #0b0080; text-decoration-line: none;" title="IEEE 1284">IEEE 1284</a> in the late 1990s, which defined the <a class="mw-redirect" href="https://en.wikipedia.org/wiki/Enhanced_Parallel_Port" style="background: none; color: #0b0080; text-decoration-line: none;" title="Enhanced Parallel Port">Enhanced Parallel Port (EPP)</a> and <a class="mw-redirect" href="https://en.wikipedia.org/wiki/Extended_Capability_Port" style="background: none; color: #0b0080; text-decoration-line: none;" title="Extended Capability Port">Extended Capability Port (ECP)</a> bi-directional versions. Today, the parallel port interface is virtually non-existent because of the rise of <a class="mw-redirect" href="https://en.wikipedia.org/wiki/Universal_Serial_Bus" style="background: none; color: #0b0080; text-decoration-line: none;" title="Universal Serial Bus">Universal Serial Bus</a> (USB) devices, along with network printing using <a href="https://en.wikipedia.org/wiki/Ethernet" style="background: none; color: #0b0080; text-decoration-line: none;" title="Ethernet">Ethernet</a> and <a href="https://en.wikipedia.org/wiki/Wi-Fi" style="background: none; color: #0b0080; text-decoration-line: none;" title="Wi-Fi">Wi-Fi</a> connected printers.</div>
<div style="background-color: white; color: #222222; font-family: sans-serif; font-size: 14px; line-height: inherit; margin-bottom: 0.5em; margin-top: 0.5em;">
The parallel port interface was originally known as the <b>Parallel Printer Adapter</b> on <a class="mw-redirect" href="https://en.wikipedia.org/wiki/PC_compatible" style="background: none; color: #0b0080; text-decoration-line: none;" title="PC compatible">IBM PC-compatible</a> <a href="https://en.wikipedia.org/wiki/Computer" style="background: none; color: #0b0080; text-decoration-line: none;" title="Computer">computers</a>. It was primarily designed to operate <a href="https://en.wikipedia.org/wiki/Dot_matrix_printing#Personal_computers" style="background: none; color: #0b0080; text-decoration-line: none;" title="Dot matrix printing">printers</a> that used <a href="https://en.wikipedia.org/wiki/IBM" style="background: none; color: #0b0080; text-decoration-line: none;" title="IBM">IBM</a>'s eight-bit <a href="https://en.wikipedia.org/wiki/Extended_ASCII" style="background: none; color: #0b0080; text-decoration-line: none;" title="Extended ASCII">extended ASCII</a> <a class="mw-redirect" href="https://en.wikipedia.org/wiki/Character_set" style="background: none; color: #0b0080; text-decoration-line: none;" title="Character set">character set</a> to print text, but could also be used to adapt other peripherals. Graphical printers, along with a host of other devices, have been designed to communicate with the system.</div>
</blockquote>
<div class="separator" style="clear: both; text-align: left;">
That article has the pinout and the history. The original IBM PC printer was a rebranded Epson dot matrix, a decent printer manufacturer at the time and affordable.</div>
<div class="separator" style="clear: both; text-align: left;">
<br /></div>
<div class="separator" style="clear: both; text-align: left;">
And the DB25 connector was relatively inexpensive and smaller than a Centronics connector.</div>
<div class="separator" style="clear: both; text-align: left;">
<br /></div>
<div class="separator" style="clear: both; text-align: left;">
This card has 74LS logic except one 7405 package. The two white packages are most likely resistors in an IC package. There is no "controller chip" or ROM, the host PC was expected to do the buffering and protocol work.</div>
<div class="separator" style="clear: both; text-align: left;">
<br /></div>
<div class="separator" style="clear: both; text-align: left;">
Ok, back to this specific card! The front only has "1501987 XM" on the front printed in white ink (not silkscreen like the rest of the text) and "1501988 PCC1VO 28J" on the back as part of the board manufacturing.</div>
<div class="separator" style="clear: both; text-align: left;">
<br /></div>
<div class="separator" style="clear: both; text-align: left;">
Google was no help as to the manufacturer. The cards are available on eBay, around $35-$56 which was surprising.</div>
<div class="separator" style="clear: both; text-align: left;">
<br /></div>
<div class="separator" style="clear: both; text-align: left;">
There is another card in the PC (I emphasize add-in card, there are no parallel or serial ports on the IBM PC 5150 motherboard) has a parallel port. </div>
<div class="separator" style="clear: both; text-align: left;">
<br /></div>
<div class="separator" style="clear: both; text-align: left;">
One thing to note: there are NO jumpers to set the port (LPT1 vs. LPT2) addresses, interrupts, or other settings. I'll have to check whether this is hardcoded for LPT1 or LPT2.</div>
<div class="separator" style="clear: both; text-align: left;">
<br /></div>
<div class="separator" style="clear: both; text-align: left;">
Why was an add-on card used and the other port not? A mystery.</div>
<div class="separator" style="clear: both; text-align: left;">
<br /></div>
<div class="separator" style="clear: both; text-align: left;">
<a href="https://21stdigitalhome.blogspot.com/2019/01/the-ibm-pc-5150-part-5-mystery-video.html" target="_blank">Next post - the video card mystery</a></div>
<br />Anne Barelahttp://www.blogger.com/profile/15220828568926183065noreply@blogger.com0tag:blogger.com,1999:blog-3086558728571967180.post-48322057848475856762019-01-20T17:15:00.001-05:002019-01-21T20:31:26.500-05:00The IBM PC 5150: Part 3 - The CPU and FPU <div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgHIcI65WGWRQN79IaotZ_FFRaLi0NaoppuJtZYnt9HXAUA-Cjb-EWSmh2VMui-hSCcQHoE9VV4qr9JCXywEw4LheGFsVGTaJbBuGp4JZaQ5-5vHYGaIvHWaB4FYs0oQrvWJcH7RgAvvSk/s1600/Cards.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1039" data-original-width="1600" height="414" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgHIcI65WGWRQN79IaotZ_FFRaLi0NaoppuJtZYnt9HXAUA-Cjb-EWSmh2VMui-hSCcQHoE9VV4qr9JCXywEw4LheGFsVGTaJbBuGp4JZaQ5-5vHYGaIvHWaB4FYs0oQrvWJcH7RgAvvSk/s640/Cards.jpg" width="640" /></a></div>
<br />
<a href="http://21stdigitalhome.blogspot.com/2019/01/inspection-of-ibm-pc-and-case-opening.html" target="_blank">Continuing on from Part 2</a>, we're now looking deeper into the IBM PC 5150 I bought off Craigslist.<br />
<br />
The CPU and FPU sockets are behind the right floppy, underneath the two grey hard drive ribbon cables and colored power supply wires. As this PC was pretty "decked out", having an i8087 floating point chip was a real possibility. And, as my first PC, a Compaq Deskpro, had an 8086 processor, this was actually my first 8088 machine purchase. Ok, to nudge my cell phone camera in there and take a shot......<br />
<br />
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiwnh5RzLjDiUDmrQpKajS6bAosS7puBuiYJ2OoQGN66YLzzU06TMYhYj4WQIpMh1jAUbOjuJHCvDg1F4HsCJAXqJCZa7bHS1cVuz5sKLdwFWRn3VoW9knlBPTa6mQULJMboCeghiKn42c/s1600/20190118_212926.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1600" data-original-width="1144" height="640" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiwnh5RzLjDiUDmrQpKajS6bAosS7puBuiYJ2OoQGN66YLzzU06TMYhYj4WQIpMh1jAUbOjuJHCvDg1F4HsCJAXqJCZa7bHS1cVuz5sKLdwFWRn3VoW9knlBPTa6mQULJMboCeghiKn42c/s640/20190118_212926.jpg" width="456" /></a></div>
<br />
What?? The two long sockets behind the keyboard and cassette powts hold the processing chips, CPU on the pictures left, FPU on the picture right. There is no 8088 chip! We know the machine runs, what gives??<br />
<br />
The chip in the socket is a <a href="https://en.wikipedia.org/wiki/NEC_V20" target="_blank">NEC V20</a>. I know what that is but I looked it up to get up to speed. Via Wikipedia:<br />
<blockquote class="tr_bq">
<div style="background-color: white; color: #222222; font-family: sans-serif; font-size: 14px; line-height: inherit; margin-bottom: 0.5em; margin-top: 0.5em;">
The <b>NEC V20</b> (μPD70108) was a <a href="https://en.wikipedia.org/wiki/Central_processing_unit" style="background: none; color: #0b0080; text-decoration-line: none;" title="Central processing unit">processor</a> made by <a href="https://en.wikipedia.org/wiki/NEC" style="background: none; color: #0b0080; text-decoration-line: none;" title="NEC">NEC</a> that was a <a href="https://en.wikipedia.org/wiki/Reverse_engineering" style="background: none; color: #0b0080; text-decoration-line: none;" title="Reverse engineering">reverse-engineered</a>, pin-compatible version of the <a href="https://en.wikipedia.org/wiki/Intel_8088" style="background: none; color: #0b0080; text-decoration-line: none;" title="Intel 8088">Intel 8088</a> with an <a class="mw-redirect" href="https://en.wikipedia.org/wiki/Instruction_set" style="background: none; color: #0b0080; text-decoration-line: none;" title="Instruction set">instruction set</a> compatible with the <a href="https://en.wikipedia.org/wiki/Intel_80186" style="background: none; color: #0b0080; text-decoration-line: none;" title="Intel 80186">Intel 80186</a>. The V20 was introduced in 1982, and the V30 debuted in 1983.</div>
<div style="background-color: white; color: #222222; font-family: sans-serif; font-size: 14px; line-height: inherit; margin-bottom: 0.5em; margin-top: 0.5em;">
The chip featured much more than the 29,000 <a href="https://en.wikipedia.org/wiki/Transistor" style="background: none; color: #0b0080; text-decoration-line: none;" title="Transistor">transistors</a> of the simpler 8088 CPU, ran at 5 to 10 <a class="mw-redirect" href="https://en.wikipedia.org/wiki/MHz" style="background: none; color: #0b0080; text-decoration-line: none;" title="MHz">MHz</a> and was around 30% faster (application dependent) than the 8088 at the same clock speed, primarily due to faster <a href="https://en.wikipedia.org/wiki/Addressing_mode" style="background: none; color: #0b0080; text-decoration-line: none;" title="Addressing mode">effective address calculation</a>, along with faster loop counters, shift registers and multiplier.</div>
</blockquote>
Ok, so at some point the owner swapped CPUs to get more horsepower. Not bad. But....<br />
<br />
I was very disappointed I didn't have the original CPU. I complained to my family and stomped around. It wasn't until later when a thought occurred to me: check out that bag of extras he gave me! In the bag was:<br />
<br />
<ol>
<li>One gender changer from a RJ type connector to serial port, maybe handy for some terminal type keyboards.</li>
<li>An in-packaging DB9 to DB15 adapter. That _might_ allow the CGA display adapter to connect to a compatible <a href="https://en.wikipedia.org/wiki/Multisync_monitor" target="_blank">multisync VGA+ display</a>. With a MicroCenter receipt for this dated 1996. Nice.</li>
<li>Two paper manuals he threw in, Quatro Pro for Windows and Toolworks Backup Pro. That software may not be on this PC but old documentation is getting scarce.</li>
<li>A parallel to pin header cable, which should belong to one of the expansion cards.</li>
<li>A plastic box I hadn't seen until looking.</li>
</ol>
<div>
The plastic box was labelled V20 on the front. Opening it provided great joy:</div>
<div>
<br /></div>
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjpBJQ3uaavDRJYA2-F_QiWLXDlE5jL0diXLXnSsTqDhLLOZrFSGU_3UXOtOr-Z5ocUwWdLeOaRKV3hzZOET_aFNG2FiE7sRGpI8IaqKiJKWecYER_F9lxfXdI2H511fy52WxWBNvj76II/s1600/20190118_220711.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1600" data-original-width="1505" height="640" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjpBJQ3uaavDRJYA2-F_QiWLXDlE5jL0diXLXnSsTqDhLLOZrFSGU_3UXOtOr-Z5ocUwWdLeOaRKV3hzZOET_aFNG2FiE7sRGpI8IaqKiJKWecYER_F9lxfXdI2H511fy52WxWBNvj76II/s640/20190118_220711.jpg" width="602" /></a></div>
<div>
<br /></div>
<br />
There was the 8088 processor. I assume the PC owner had gotten the V20 as an upgrade at some point and put the original CPU in the V20 box. Yay! We can see the CPU is dated 1982.<br />
<br />
But what? That's not an Intel chip, it's an AMD. Aren't AMD and Intel enemies? Didn't IBM only use Intel chips? No worries for me. <a href="https://en.wikipedia.org/wiki/IBM_Personal_Computer#Original_PC" target="_blank">Wikipedia helps here</a> too:<br />
<blockquote class="tr_bq">
<span style="background-color: white; color: #222222; font-family: sans-serif; font-size: 14px;">In early units, the Intel 8088 used was a 1978 version, later were 1978/81/2 versions of the Intel chip; second-sourced </span><a class="mw-redirect" href="https://en.wikipedia.org/wiki/AMD" style="background: none rgb(255, 255, 255); color: #0b0080; font-family: sans-serif; font-size: 14px; text-decoration-line: none;" title="AMD">AMDs</a><span style="background-color: white; color: #222222; font-family: sans-serif; font-size: 14px;"> were used after 1983 (no citation)</span><span style="background-color: white; color: #222222; font-family: sans-serif; font-size: 14px;">. Some owners replaced the 8088 with an </span><a href="https://en.wikipedia.org/wiki/NEC_V20" style="background: none rgb(255, 255, 255); color: #0b0080; font-family: sans-serif; font-size: 14px; text-decoration-line: none;" title="NEC V20">NEC V20</a><span style="background-color: white; color: #222222; font-family: sans-serif; font-size: 14px;"> for a slight increase in processing speed and support for real mode 80186 instructions. The V20 gained its speed increase through the use of a hardware multiplier which the 8088 lacked.</span></blockquote>
At the time this IBM 5150 was built, the Intel 8088 was being "second sourced" or licensed to other companies to manufacture. This was often done to reassure users that a steady stream of chips may be available, even if one company (like Intel) had a production issue. Taking a look, <a href="https://en.wikipedia.org/wiki/Intel_8088" target="_blank">Wikipedia says of the 8088</a>:<br />
<blockquote class="tr_bq">
<table class="infobox" style="background-color: #f8f9fa; border-spacing: 3px; border: 1px solid rgb(162, 169, 177); clear: right; color: black; font-family: sans-serif; font-size: 12.32px; line-height: 1.5em; margin: 0.5em 0px 0.5em 1em; padding: 0.2em; width: 22em;"><tbody>
<tr><th scope="row" style="text-align: left; vertical-align: top;">Common manufacturer(s)</th><td style="vertical-align: top;"><div class="plainlist">
<ul style="line-height: inherit; list-style: none none; margin: 0px; padding: 0px;">
<li style="margin-bottom: 0px;"><a href="https://en.wikipedia.org/wiki/Intel" style="background: none; color: #0b0080; text-decoration-line: none;" title="Intel">Intel</a>, <a class="mw-redirect" href="https://en.wikipedia.org/wiki/AMD" style="background: none; color: #faa700;" title="AMD">AMD</a>, <a href="https://en.wikipedia.org/wiki/NEC" style="background: none; color: #0b0080; text-decoration-line: none;" title="NEC">NEC</a>, <a href="https://en.wikipedia.org/wiki/Fujitsu" style="background: none; color: #0b0080; text-decoration-line: none;" title="Fujitsu">Fujitsu</a>, <a href="https://en.wikipedia.org/wiki/Harris_Corporation" style="background: none; color: #0b0080; text-decoration-line: none;" title="Harris Corporation">Harris</a> (<a href="https://en.wikipedia.org/wiki/Intersil" style="background: none; color: #0b0080; text-decoration-line: none;" title="Intersil">Intersil</a>), <a href="https://en.wikipedia.org/wiki/Oki_Electric_Industry" style="background: none; color: #0b0080; text-decoration-line: none;" title="Oki Electric Industry">OKI</a>, <a class="mw-redirect" href="https://en.wikipedia.org/wiki/Siemens_AG" style="background: none; color: #0b0080; text-decoration-line: none;" title="Siemens AG">Siemens AG</a>, <a href="https://en.wikipedia.org/wiki/Texas_Instruments" style="background: none; color: #0b0080; text-decoration-line: none;" title="Texas Instruments">Texas Instruments</a>, <a href="https://en.wikipedia.org/wiki/Mitsubishi" style="background: none; color: #0b0080; text-decoration-line: none;" title="Mitsubishi">Mitsubishi</a></li>
</ul>
</div>
</td></tr>
</tbody></table>
</blockquote>
Wow, that's a lot of licensing. There were many PCs and clones made and the 8088 was put into many designs so it's not surprising. There wasn't the friction between AMD and Intel that we've had since the Athlon days.<br />
<br />
Ok, we have two CPUs (one in-place, one in-hand), what about the 8087?<br />
<br />
The picture shows that an 8087 is not in the socket, the socket is empty. The dust would indicate the original owner probably never bought one and put it in (or had one for any length of time if they did). That's ok with me for now. Why?<br />
<br />
<ol>
<li>Unlike the floating point units in later PCs, the 8087 was not used widely in software. The math operations could be simulated with 8088 based routines but the calculations would be slower. For any software I may be using, having an 8087 would probably not matter. </li>
<li>I <a href="https://www.ebay.com/sch/i.html?_from=R40&_trksid=p2334524.m570.l1313.TR1.TRC0.A0.H0.Xintel+8087.TRS0&_nkw=intel+8087&_odkw=intel+8088+cpu" target="_blank">looked on eBay</a> and 8087 chips appear to be a lot less expensive than in the 1980s. Less than $10 US although that would be from China and one risks getting a fake chip.</li>
</ol>
<div>
Ok, so much for a more adventurous look at the processors in this IBM PC. <a href="https://21stdigitalhome.blogspot.com/2019/01/the-ibm-pc-5150-part-4-expansion-card.html" target="_blank">I'll get to the expansion cards next</a> which will allow a better look of the motherboard beneath. Thanks for reading along, if you all would like more or less detail, etc. let me know in the comments.</div>
Anne Barelahttp://www.blogger.com/profile/15220828568926183065noreply@blogger.com0tag:blogger.com,1999:blog-3086558728571967180.post-47628578065010526772019-01-20T15:27:00.004-05:002019-01-21T20:30:50.164-05:00The IBM PC 5150: Part 2 - Inspection of the IBM PC and Case Opening<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjclO8gookdMXuXaD1Gk_o6PHQ6vIZ2OYVuCFNUNoVHFrn268H1ZrYuOlPTt8TxhE-f_pNsqjwl6jhzYMGX9K7hQpC693nl1oYGbYdPNXjYcK_ciQJCvrR7jhJTM2y4aAJp2q_eOG4D3H8/s1600/20190120_144503.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1200" data-original-width="1600" height="480" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjclO8gookdMXuXaD1Gk_o6PHQ6vIZ2OYVuCFNUNoVHFrn268H1ZrYuOlPTt8TxhE-f_pNsqjwl6jhzYMGX9K7hQpC693nl1oYGbYdPNXjYcK_ciQJCvrR7jhJTM2y4aAJp2q_eOG4D3H8/s640/20190120_144503.jpg" width="640" /></a></div>
<br />
<a href="http://21stdigitalhome.blogspot.com/2019/01/new-series-of-posts-documenting-ibm-pc.html" target="_blank">Continuing from last time</a>:<br />
<br />
Looking on the back, I could tell the machine had a decent number of expansion cards in it. That was good. There appear to be scratches on the back, a letter beta and initials JPF (I believe the initials of the original owner I bought it from).<br />
<br />
Doing some research, I found information on the <a href="http://www.minuszerodegrees.net/" target="_blank">minuszerodegrees.net site</a> about early IBM PCs. That website is a treasure trove of info on early IBM hardware and knowledge. Bookmark it.<br />
<br />
Generally, people class 5150 IBM PCs into two groups:<br />
<br />
<br />
<ol>
<li>PC-1 or 'model A' have black expansion card covers, a black power supply plug backplate, and no circled B on the back. There are two screws holding the case on. Metal speaker holder.</li>
<li>PC-2 or 'model B' have solver expansion card covers and a letter B in a circle on the back. There are 5 screws holding the case on. Plastic speaker holder.</li>
</ol>
<div>
By the picture above, it is a 5150 PC-2 or 'model B'. That's ok, this machine was not purchased to be an example of an early production PC.</div>
<div>
<br /></div>
<div>
Both have two large DIN connector receptacles on the back, one for a keyboard, one for a cassette interface for ROM IBM Cassette BASIC.</div>
<div>
<br /></div>
<div>
Ok, let's pop the hood. First off, we determine if it is a 64K motherboard or a 64K to 256K motherboard. a peak on the right side shows the latter:</div>
<div>
<br /></div>
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg8DJ2csW1Zzw4_VEnUovUAEDggUHuV_kRsARaO5VaHzfTP9GORKkLfjiMjVL7kRg8MRLSgvRnm_Es1uwb3DOvP2Ps3Hc9Au-BteCVJNPGwIu-QQNNgLahdRArldl5-4t4XBqN9ZDHtbiA/s1600/ram-type-mb.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="737" data-original-width="1600" height="183" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg8DJ2csW1Zzw4_VEnUovUAEDggUHuV_kRsARaO5VaHzfTP9GORKkLfjiMjVL7kRg8MRLSgvRnm_Es1uwb3DOvP2Ps3Hc9Au-BteCVJNPGwIu-QQNNgLahdRArldl5-4t4XBqN9ZDHtbiA/s400/ram-type-mb.jpg" width="400" /></a></div>
<div class="separator" style="clear: both; text-align: center;">
<br /></div>
<div class="separator" style="clear: both; text-align: left;">
There is dust in the case also. Ok, this type of motherboard could hold a maximum 256K of memory. Meaning we have one card with expansion memory to get to the 640K the machine displayed earlier on boot and check.</div>
<div class="separator" style="clear: both; text-align: left;">
<br /></div>
<div class="separator" style="clear: both; text-align: left;">
Ok, here is the machine with the case removed:</div>
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgkQc2onSrpTDAAYNuF_hhXq8gHlvF3KR7HR5rJuACMhNYL1m_NczeHGgWm6pG8OvVDzgsN8J0soIf-SgpnFsXzL7gLFc_PDFFBpKfPCASYBUDgjrhzBDSjSrTklvPo9vtZo1JDmdqmnFs/s1600/20190120_144529.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1200" data-original-width="1600" height="480" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgkQc2onSrpTDAAYNuF_hhXq8gHlvF3KR7HR5rJuACMhNYL1m_NczeHGgWm6pG8OvVDzgsN8J0soIf-SgpnFsXzL7gLFc_PDFFBpKfPCASYBUDgjrhzBDSjSrTklvPo9vtZo1JDmdqmnFs/s640/20190120_144529.jpg" width="640" /></a></div>
<div class="separator" style="clear: both; text-align: left;">
<br /></div>
<div>
Yes, all five ISA card expansion slots filled, this is good, lots of hardware in this buy and more functionality. That power supply doesn't look IBM, I'll have to check that later (and it's noisy too but not in a "bad components" way.</div>
<div>
<br /></div>
<div>
There was an extra expansion bay bracket connected, bent and sticking out. And a cable sticking out of the case also. This turned out to be a joystick interface and bracket. Apparently gaming must have been done on this but an early PC didn't have extra bracket or knockout space for the connector.</div>
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiYhm3vsWvfkS5ReeCs7n7dtU6UC-eUAgPC3vc9iaRo_KD95pMUzEUCs-q9gQAc_tVCcbZpPYQq-cyY8YGTOH0eFR6cdDU8BWLKc89axQdCNoAm7GCqlh6o_C1eiKMyThKOhkRt6JOCO1M/s1600/joystick.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1200" data-original-width="1600" height="300" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiYhm3vsWvfkS5ReeCs7n7dtU6UC-eUAgPC3vc9iaRo_KD95pMUzEUCs-q9gQAc_tVCcbZpPYQq-cyY8YGTOH0eFR6cdDU8BWLKc89axQdCNoAm7GCqlh6o_C1eiKMyThKOhkRt6JOCO1M/s400/joystick.jpg" width="400" /></a></div>
<div>
<br /></div>
<div>
So I labeled the connector and straightened the bent bracket and set them aside for now. I have a vintage flightstick style game controller for IBM PCs I can use with it.</div>
<div>
<br /></div>
<div>
Ok, <a href="https://21stdigitalhome.blogspot.com/2019/01/the-ibm-pc-5150-cpu-and-fpu.html" target="_blank">next time we'll look at the CPU/GPU area</a> and mafter that start the ISA card inventory.</div>
Anne Barelahttp://www.blogger.com/profile/15220828568926183065noreply@blogger.com0tag:blogger.com,1999:blog-3086558728571967180.post-16402434351527770922019-01-20T12:12:00.001-05:002019-01-20T15:28:34.212-05:00New Series of Posts - Documenting an IBM PC 5150 from Craigslist<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjInbJnq8x8lYytHb90a1M3yVMfvLNsajB_ToTqDF7sP8KVSq8H_7p8VdRq496edLdgwvPm2Ub8P-bWaR9d5KpUVhYnQOOC7XZkhNccJ5sh70fqpC6LEBR07UqiR8nFCDZPXj5RcKyX-_8/s1600/20190116_165853.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1600" data-original-width="1200" height="640" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjInbJnq8x8lYytHb90a1M3yVMfvLNsajB_ToTqDF7sP8KVSq8H_7p8VdRq496edLdgwvPm2Ub8P-bWaR9d5KpUVhYnQOOC7XZkhNccJ5sh70fqpC6LEBR07UqiR8nFCDZPXj5RcKyX-_8/s640/20190116_165853.jpg" width="480" /></a></div>
<br />
<br />
I've been involved in PC-compatible computing since college. Let's just say the IBM PC had been out for 3 years and the Compaq portable was available for checkout by the college to do work. My father-in-law was also into computing early and had bought an IBM PC himself. We ended up buying a Compaq DeskPro (1/original, XT class) in late 1985 or so (and we still have it, in storage).<br />
<br />
With many MS-DOS disks, I really wanted to work on imaging things while they are still viable. And, perhaps, have some vintage fun myself. So when an IBM PC came up on Craigslist, I snapped it up for $180. I didn't know what all I was buying but it worked and I saw it had a hard drive and some other additions while picking it up (yes!).<br />
<br />
So I have it home and it's time to start to see what I have bought.<br />
<br />
Initial inspection from the outside:<br />
<br />
The system came with:<br />
<br />
<ul>
<li>The system unit 5150 - functional, boots to MS-DOS (slowly)</li>
<li>An IBM CGA 5153 Display - functional (at least in black/white)</li>
<li>IBM PC Keyboard - functional, no model number plate, heavy!</li>
<li>Bag of extras including a second full height floppy drive</li>
<li>A DB25 to Centronics cable. No printer.</li>
</ul>
<div>
And initial testing:</div>
<div>
<br /></div>
<div>
Definitely the system should boot from hard drive. And the boot process is painfully slow as this machine has a full 640K of RAM and the processor must test it all.</div>
<div>
<br /></div>
<div>
The hard disk has MS-DOS 4.01 on it. Some of the floppy disks that came with it have PC-DOS 2.01 and MS-DOS 6.2. Do not mix using command.com from a floppy with the DOS on the hard drive, the system will hang.</div>
<div>
<br /></div>
<div>
Both installed floppy drives work. The memory appears to be all registering.</div>
<div>
<br /></div>
<div>
The hard drive, as seen at the home I bought the unit from, has some software on the hard drive:</div>
<div>
<ul>
<li>WordPerfect</li>
<li>dBASE III</li>
<li>AST utility</li>
<li>Games</li>
<li>DOS</li>
<li>Lotus 1-2-3</li>
</ul>
<div>
There appears to be no disks or documentation for WordPerfect, dBASE, 1-2-3, or AST. There is no official DOS media. There are some floppies included with games.</div>
</div>
<div>
<br /></div>
<div>
<a href="http://21stdigitalhome.blogspot.com/2019/01/inspection-of-ibm-pc-and-case-opening.html" target="_blank">Next Post</a>: I dive into the inside of the system unit to see what all is there.</div>
Anne Barelahttp://www.blogger.com/profile/15220828568926183065noreply@blogger.com0tag:blogger.com,1999:blog-3086558728571967180.post-4038532965900252462018-11-11T17:02:00.000-05:002018-11-11T17:25:57.911-05:00Emulating MS-DOS on a Raspberry Pi and Playing Games using DOSBoxI have a soft spot for MS-DOS, as it was the first PC operating system I used. It started in 1984 with Compaq luggable computers available for loan at Caltech and at JPL when I worked there over the summer of '84. I don't ever recall using IBM's version, PC-DOS, as I never recall using IBM hardware. But thanks to using 100% IBM compatibles rather than offshoots like Tandy computers, it really didn't matter.<br />
<br />
The first PC we bought, one of our first large purchases as a couple, was the first Compaq Deskpro (Model 1, 8086), Compaq's first foray into desktops after the success of the Compaq portable.<br />
<br />
<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh1m05EPHdAGxTlstxJpZQ_cDRUmWYt9FVLfH7WYPrzz3UplppwEmVbK5eRhlESR9I9n_xWmr6Vv2ZIKN-DWiVePrW8-_TaX3WOT4x8LBgysM2KNDCr92buSJ1cfHxNXBUvK20YhzAtEIQ/s1600/vintage-compaq-deskpro-model-8086_1_5da9965cb4a9554c457d7379f1614e2b.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" data-original-height="1080" data-original-width="1440" height="300" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh1m05EPHdAGxTlstxJpZQ_cDRUmWYt9FVLfH7WYPrzz3UplppwEmVbK5eRhlESR9I9n_xWmr6Vv2ZIKN-DWiVePrW8-_TaX3WOT4x8LBgysM2KNDCr92buSJ1cfHxNXBUvK20YhzAtEIQ/s400/vintage-compaq-deskpro-model-8086_1_5da9965cb4a9554c457d7379f1614e2b.jpg" width="400" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Compaq Deskpro Model 1 (8086) via <a href="https://www.worthpoint.com/worthopedia/vintage-compaq-deskpro-model-8086-1834082890" target="_blank">this site</a>.</td></tr>
</tbody></table>
So I have a soft spot for DOS computing.<br />
<div>
<br /></div>
<div>
I've wanted to put DOS on small, modern hardware for awhile. My first project is using the Raspberry Pi 3.</div>
<div>
<br /></div>
<div>
I have a RasPi mounted to the official Raspberry Pi display.</div>
<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjQOiZG-DniN4QxoEJEFyNlY08qXz0J6kMmHtANd6_tgaova1uqgcu6AXIGUkY6ngFYe5xS_YwaL0IEggtlXxD7GMS9Z2wgDIl6W0eFyTCjL4Zc-dkb86F9zcg-6N_hj7XUWDs5gTHeawM/s1600/download.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" data-original-height="183" data-original-width="275" height="266" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjQOiZG-DniN4QxoEJEFyNlY08qXz0J6kMmHtANd6_tgaova1uqgcu6AXIGUkY6ngFYe5xS_YwaL0IEggtlXxD7GMS9Z2wgDIl6W0eFyTCjL4Zc-dkb86F9zcg-6N_hj7XUWDs5gTHeawM/s400/download.jpg" width="400" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Raspberry Pi and official LCD display (photo via <a href="https://www.itproportal.com/2015/09/09/official-touchscreen-display-joins-raspberry-pi-range/" target="_blank">this site</a>)</td></tr>
</tbody></table>
The only hardware you need to add is a keyboard (a mouse helps for setup). I have a couple of wired keyboards with built-in trackpads. Any USB keyboard that the Pi will recognize will do.<br />
<div>
<br /></div>
<div>
There are many Raspberry Pi tutorials on loading Dosbox, the MS-DOS emulator for Raspberry Pi. <a href="https://pimylifeup.com/raspberry-pi-dosbox/" target="_blank">This one at PiMyLifeUp</a> appears to be just fine, I think I followed a different one but they are very similar.</div>
<div>
<br /></div>
<div>
I set Dosbox to use the directory <span style="font-family: "courier new" , "courier" , monospace;">dos</span> under <span style="font-family: "courier new" , "courier" , monospace;">/home/pi</span> as my MS-DOS disk. I mapped this to drive <span style="font-family: "courier new" , "courier" , monospace;">C:\</span></div>
<div>
<br /></div>
<div>
I added a link to the graphical interface under games.</div>
<div>
<br /></div>
<div>
How to get the files from my PC to the Pi? There are many ways to do this, some more painful than others. </div>
<div>
<br /></div>
<div>
I used <a href="https://raspberrypihq.com/how-to-share-a-folder-with-a-windows-computer-from-a-raspberry-pi/" target="_blank">this guide at Raspberry Pi HQ</a> to use SAMBA to map my DOS directory as a network shareable location. <a href="https://www.opentechguides.com/how-to/article/raspberry-pi/86/shared-folder-windows.html" target="_blank">This guide</a> may also help.</div>
<div>
<br /></div>
<div>
I said <span style="font-family: "courier new" , "courier" , monospace;">public=yes</span> which means anyone can access my Pi but I suggest you have the login. My SAMBA setup allows access to the entire <span style="font-family: "courier new" , "courier" , monospace;">/home/pi</span> directory - you might want to just map the <span style="font-family: "courier new" , "courier" , monospace;">dos</span> directory for more security.</div>
<div>
<br /></div>
<div>
In Windows file explorer, in the location bar type <span style="font-family: "courier new" , "courier" , monospace;">\\raspberrypi\pi</span> and you should see your files. Note that you'll have to enter a password if you configured it.</div>
<div>
<br /></div>
<div>
Copy over your games. Our favorite is Rogue, redone for PC from the DEC VAX et al. sources. <a href="https://en.wikipedia.org/wiki/Rogue_(video_game)" target="_blank">Wikipedia</a>. You can <a href="https://archive.org/details/msdos_Rogue_1983" target="_blank">play it in-browser here</a> to try it out via Internet Archive (it's some sort of hacked copy there though). You can see it being played by someone in <a href="https://www.youtube.com/watch?v=PDFLAArINEA">this Youtube video</a>.<br />
<br />
Rogue is in color and is ASCII graphics like alot of early text games and programs. I think our copy was ported from Unix and not a copy of the Epyx release, Techers did a lot of porting to MS-DOS from Unix back then.</div>
<div>
<br /></div>
<div>
I still had the original files from the '80s to I copied them over to the Pi and they appear in a subdirectory in Dosbox. And it runs like a champ!<br />
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjTbuZBFO4olBIpUKZFYc7pB5YxYZPZuoY0iYGo5pqNeGxOCvxJeuz7tsZDUSAy-z7o_wj0VAyAWPybDusd88A7HqQNQza-trxIMcrp2oa5LFmwAmSffympuabBHJKhLPHBpnGcYVIdujM/s1600/download.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="609" data-original-width="996" height="388" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjTbuZBFO4olBIpUKZFYc7pB5YxYZPZuoY0iYGo5pqNeGxOCvxJeuz7tsZDUSAy-z7o_wj0VAyAWPybDusd88A7HqQNQza-trxIMcrp2oa5LFmwAmSffympuabBHJKhLPHBpnGcYVIdujM/s640/download.jpg" width="640" /></a></div>
<br /></div>
<div class="separator" style="clear: both; text-align: center;">
<br /></div>
<div class="separator" style="clear: both; text-align: left;">
If you are looking for MS-DOS Games/software, you can Google around. One site I found is <a href="http://www.abandonia.com/">abandonia.com</a> which looks good. In all their software, <a href="http://www.abandonia.com/en/games/982/Rogue+-+The+Adventure+Game.html">they have Rogue also</a> if you want it.</div>
<div class="separator" style="clear: both; text-align: left;">
<br /></div>
<div class="separator" style="clear: both; text-align: left;">
Hopefully this has given you some ideas for how to set up your own MS-DOS emulator. If you think I skipped steps or it is unclear, there are other sites that may have better step by step.</div>
<div class="separator" style="clear: both; text-align: left;">
<br /></div>
<div class="separator" style="clear: both; text-align: left;">
I hope to run a real 8088 code emulator on hardware soon. It all depends on time.</div>
<div>
<div>
<br /></div>
</div>
Anne Barelahttp://www.blogger.com/profile/15220828568926183065noreply@blogger.com0tag:blogger.com,1999:blog-3086558728571967180.post-2951824305842608082018-09-13T12:17:00.000-04:002018-09-13T12:17:31.309-04:00Book Review: Ask an Engineer on September 12thLimor "Ladyada" Fried and Phil Torrone review my new book <i>Getting Started with Adafruit Circuit Playground Express</i> from this clip on the Ask an Engineer broadcast on September 12, 2018.<br />
<br />
<div class="separator" style="clear: both; text-align: center;">
<iframe allowfullscreen='allowfullscreen' webkitallowfullscreen='webkitallowfullscreen' mozallowfullscreen='mozallowfullscreen' width='320' height='266' src='https://www.blogger.com/video.g?token=AD6v5dzuY0Utd-cqf3bUw8CLwfft9p0LghVXE4SLNFvJgf8_ilG2q1UU7zcOjfYmsMeJzHilYFO9ga4f5farUAB-eQ' class='b-hbp-video b-uploaded' frameborder='0'></iframe></div>
<br />Anne Barelahttp://www.blogger.com/profile/15220828568926183065noreply@blogger.com0tag:blogger.com,1999:blog-3086558728571967180.post-36739892416975858472018-09-10T12:49:00.000-04:002018-09-10T12:49:06.309-04:00Getting Started with Adafruit Circuit Playground Express book now out from major booksellers!<div class="separator" style="clear: both; text-align: center;">
<a href="https://1.bp.blogspot.com/-qTzuIq_3wsY/W5af9OTx5-I/AAAAAAAAURM/lc1tfyoKOpMgTj6kxiG8WfVgwtA10UhmACLcBGAs/s1600/-%2Bfinal%2Bcover%2Bcropped%2Bgraphic.JPG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1177" data-original-width="1600" height="470" src="https://1.bp.blogspot.com/-qTzuIq_3wsY/W5af9OTx5-I/AAAAAAAAURM/lc1tfyoKOpMgTj6kxiG8WfVgwtA10UhmACLcBGAs/s640/-%2Bfinal%2Bcover%2Bcropped%2Bgraphic.JPG" width="640" /></a></div>
<div style="background-color: white; box-sizing: border-box; font-family: "proxima nova", "lucida grande", "lucida sans unicode", "lucida sans", Geneva, Verdana, sans-serif; font-size: 15px; letter-spacing: 0.28px; line-height: 19px; margin-bottom: 1.5em; padding: 0px 0.5em 0px 0px;">
<br /></div>
<div style="background-color: white; box-sizing: border-box; font-family: "proxima nova", "lucida grande", "lucida sans unicode", "lucida sans", Geneva, Verdana, sans-serif; font-size: 15px; letter-spacing: 0.28px; line-height: 19px; margin-bottom: 1.5em; padding: 0px 0.5em 0px 0px;">
Out today September 10th! <span style="box-sizing: border-box; font-weight: 700; margin: 0px; padding: 0px;">A new paperback book on the Adafruit Circuit Playground Express board!</span> The book gets you started with microcontrollers by learning how to use the Express with Microsoft MakeCode and CircuitPython. There is also information on configuring and using the board in the Arduino IDE.</div>
<div style="background-color: white; box-sizing: border-box; font-family: "proxima nova", "lucida grande", "lucida sans unicode", "lucida sans", Geneva, Verdana, sans-serif; font-size: 15px; letter-spacing: 0.28px; line-height: 19px; margin-bottom: 1.5em; padding: 0px 0.5em 0px 0px;">
Now available from online bookstores like <a href="https://www.amazon.com/gp/product/1680454889/" style="background: 0px 0px; box-sizing: border-box; color: #00acec; margin: 0px; padding: 0px; text-decoration-line: none;">Amazon</a>, <a href="https://www.barnesandnoble.com/w/getting-started-with-adafruit-circuit-playground-express-mike-barela/1129201771" style="background: 0px 0px; box-sizing: border-box; color: #00acec; margin: 0px; padding: 0px; text-decoration-line: none;">Barnes & Noble</a>, <a href="https://www.amazon.co.uk/Getting-Started-Adafruit-Circuit-Playground/dp/1680454889/" style="background: 0px 0px; box-sizing: border-box; color: #00acec; margin: 0px; padding: 0px; text-decoration-line: none;">Amazon.co.uk</a>, <a href="https://www.amazon.ca/Getting-Started-Adafruit-Circuit-Playground/dp/1680454889/" style="background: 0px 0px; box-sizing: border-box; color: #00acec; margin: 0px; padding: 0px; text-decoration-line: none;">amazon.ca</a>, and <a href="https://www.booktopia.com.au/getting-started-with-adafruit-circuit-playground-express-mike-barela/prod9781680454888.html" style="background: 0px 0px; box-sizing: border-box; color: #00acec; margin: 0px; padding: 0px; text-decoration-line: none;">booktopia.com.au</a>.</div>
<div style="background-color: white; box-sizing: border-box; font-family: "proxima nova", "lucida grande", "lucida sans unicode", "lucida sans", Geneva, Verdana, sans-serif; font-size: 15px; letter-spacing: 0.28px; line-height: 19px; margin-bottom: 1.5em; padding: 0px 0.5em 0px 0px;">
The book will also be available from <a href="http://www.adafruit.com/" target="_blank">Adafruit</a> to include bundling with Circuit Playground Express, stay tuned.</div>
<div style="background-color: white; box-sizing: border-box; font-family: "proxima nova", "lucida grande", "lucida sans unicode", "lucida sans", Geneva, Verdana, sans-serif; font-size: 15px; letter-spacing: 0.28px; line-height: 19px; margin-bottom: 1.5em; padding: 0px 0.5em 0px 0px;">
Have all the information at your fingertips in this new book. Check it out today.</div>
Anne Barelahttp://www.blogger.com/profile/15220828568926183065noreply@blogger.com0tag:blogger.com,1999:blog-3086558728571967180.post-39556686688502421132018-07-14T19:21:00.000-04:002018-07-14T19:21:29.103-04:00My Current Writings on the Adafruit Learning System and Blog<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhc1yAgkqo_HFZJPoMjMHA2tU2sYL5jynckvSrAL0hCmDvdABZYXkqioYTE3gr2Y_M4loDhEpEkwT4La9N-8OaqoDiu7c3G_hl3QumnPi5sUoynI4vQ2_gpPCoMIKxDPK-xOpGBImLQiXk/s1600/helloworld-circuitpython.gif" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="480" data-original-width="640" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhc1yAgkqo_HFZJPoMjMHA2tU2sYL5jynckvSrAL0hCmDvdABZYXkqioYTE3gr2Y_M4loDhEpEkwT4La9N-8OaqoDiu7c3G_hl3QumnPi5sUoynI4vQ2_gpPCoMIKxDPK-xOpGBImLQiXk/s320/helloworld-circuitpython.gif" width="320" /></a></div>
<br />
Where have I been writing if not on the blog? Besides writing my new book <a href="http://21stdigitalhome.blogspot.com/2018/07/new-book-make-getting-started-with.html" target="_blank">Make: Getting Started with Adafruit Circuit Playground Express</a>, I have been writing a good number of tutorials on the Adafruit Learning System and posts on the <a href="https://blog.adafruit.com/" target="_blank">Adafruit Blog</a>.<br />
<br />
What is the <a href="https://learn.adafruit.com/" target="_blank">Adafruit Learning System</a>? It's 1500+ free tutorials on making. With the best writers on making, electronics, and open source, the Adafruit Learning System is the place to look for inspiration for your next project.<br />
<br />
<a href="https://learn.adafruit.com/users/MikeBarela" target="_blank">You can find projects I have contributed to here</a>.<br />
<br />
Of course I have a good deal of writing on the <a href="https://www.adafruit.com/product/3333" target="_blank">Circuit Playground Express</a> board - it's the easiest way to start interacting with electronics and making.<br />
<br />
Lately my writing has focused on the new <a href="https://www.adafruit.com/?q=crickit" target="_blank">Adafruit Crickit robotics board</a>. This not yet another robotic board (NYARB?). You certainly can make robots that look like the two wheeled bots everybody makes. But it is designed to do so much more. Do you want to use stepper motors and/or servos, check. Add NeoPixel LED lights, check. Add concurrent sound to your project, yes! So you are able to do so much more compared to previous products.<br />
<br />
Crickit comes in two versions, <a href="https://www.adafruit.com/product/3093" target="_blank">one for use with Circuit Playground Express</a> and <a href="https://www.adafruit.com/product/3343" target="_blank">one for Adafruit Feather processors and boards</a>. Adafruit has hinted of upcoming versions of Crickit for the BBC micro:bit and one for the Raspberry Pi as a HAT.<br />
<br />
So, if you'd like to read more of my writing, please visit the <a href="https://learn.adafruit.com/" target="_blank">Adafruit Learning System</a> and the <a href="https://blog.adafruit.com/" target="_blank">Adafruit blog</a>.<br />
<br />
<br />Anne Barelahttp://www.blogger.com/profile/15220828568926183065noreply@blogger.com0tag:blogger.com,1999:blog-3086558728571967180.post-4709257151229408162018-07-14T19:02:00.000-04:002018-08-04T12:14:29.811-04:00New Book: Make: Getting Started with Adafruit Circuit Playground Express<div class="separator" style="clear: both; text-align: center;">
<a href="https://1.bp.blogspot.com/-nhXxR0QeV24/W0p_n71jlkI/AAAAAAAAT8A/YCYQ0JlzfJs3a_w6z7QY0tMnV5cJAj2qgCLcBGAs/s1600/-%2Bcover%2B%2528Humble%2Bed%2529.PNG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1288" data-original-width="848" height="400" src="https://1.bp.blogspot.com/-nhXxR0QeV24/W0p_n71jlkI/AAAAAAAAT8A/YCYQ0JlzfJs3a_w6z7QY0tMnV5cJAj2qgCLcBGAs/s400/-%2Bcover%2B%2528Humble%2Bed%2529.PNG" width="263" /></a></div>
<div class="separator" style="clear: both; text-align: center;">
</div>
<br />
My new book <a href="https://www.amazon.com/gp/product/1680454889/ref=as_li_tl?ie=UTF8&camp=1789&creative=9325&creativeASIN=1680454889&linkCode=as2&tag=lymphomaresource&linkId=bff1c6b375574070bddeb0a5a644a0e0" target="_blank">Getting Started with Adafruit Circuit Playground Express: The Multipurpose Learning and Development Board from Adafruit</a><img alt="" border="0" height="1" src="//ir-na.amazon-adsystem.com/e/ir?t=lymphomaresource&l=am2&o=1&a=1680454889" style="border: none !important; margin: 0px !important;" width="1" /> was released earlier this month in a Humble Bundle in eBook format. The final print and eBook will be out in September, hopefully available at <a href="https://makerfaire.com/new-york/" target="_blank">World Maker Faire in NYC</a> September 22 and 23.<br />
<br />
Prerelease buy on Amazon: <a href="https://www.amazon.com/gp/product/1680454889/ref=as_li_tl?ie=UTF8&camp=1789&creative=9325&creativeASIN=1680454889&linkCode=as2&tag=lymphomaresource&linkId=bff1c6b375574070bddeb0a5a644a0e0" target="_blank">Getting Started with Adafruit Circuit Playground Express: The Multipurpose Learning and Development Board from Adafruit</a><img alt="" border="0" height="1" src="//ir-na.amazon-adsystem.com/e/ir?t=lymphomaresource&l=am2&o=1&a=1680454889" style="border: none !important; margin: 0px !important;" width="1" /><br />
<br />
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj81BzsSNhXvuIqdVP1PV5iFpHuLxcWs7bEMhocrhymjiSiEwE4zzhH8mNqedGKkKrAZb6wb6dwx9N8cid9u9jFO1sfpWJcuGZY29XEprPR150pAm7xdKdfcsbev2_NMkOyp8a9m_ggp44/s1600/MF18NY_Badge-1.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="255" data-original-width="255" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj81BzsSNhXvuIqdVP1PV5iFpHuLxcWs7bEMhocrhymjiSiEwE4zzhH8mNqedGKkKrAZb6wb6dwx9N8cid9u9jFO1sfpWJcuGZY29XEprPR150pAm7xdKdfcsbev2_NMkOyp8a9m_ggp44/s1600/MF18NY_Badge-1.png" /></a></div>
<br />
I should be at Maker Faire NY - stay tuned for when and where and plan to come & have fun hanging out with the Makers!<br />
<br />Anne Barelahttp://www.blogger.com/profile/15220828568926183065noreply@blogger.com0tag:blogger.com,1999:blog-3086558728571967180.post-33619247190184509742018-04-14T15:23:00.002-04:002018-04-14T15:23:20.928-04:00New Company: BarelaTech, LLCAs part of my retirement and consulting, I have formed a new company: BarelaTech, LLC. Instead of me using my name, I may publish under the BarelaTech banner from time to time.<br />
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj_TGu0Egwk0btPaYcXOf-wg7oyjrXalAUG4gXLtMvDorcHWi9faMc-IHSY9DSb-odlo9SSiZI96Xg-z_sDHHilj8dqAZVBOsS179A4Sfoim5QF9c937ZF9p1yV_0Ev_qf8XeYCXiyG-rc/s1600/BarelaTech%252C+LLC+word+logo+med.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="57" data-original-width="220" height="82" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj_TGu0Egwk0btPaYcXOf-wg7oyjrXalAUG4gXLtMvDorcHWi9faMc-IHSY9DSb-odlo9SSiZI96Xg-z_sDHHilj8dqAZVBOsS179A4Sfoim5QF9c937ZF9p1yV_0Ev_qf8XeYCXiyG-rc/s320/BarelaTech%252C+LLC+word+logo+med.jpg" width="320" /></a></div>
<div class="separator" style="clear: both; text-align: left;">
I was trying to register Unsound Engineering but the state didn't like it.</div>
<div class="separator" style="clear: both; text-align: left;">
<br /></div>
<div class="separator" style="clear: both; text-align: left;">
You can see the company website at <a href="https://barelatech.com/">https://barelatech.com/</a> and <a href="http://barela.tech/">http://barela.tech/</a></div>
<div class="separator" style="clear: both; text-align: left;">
<br /></div>
<br />
<br />Anne Barelahttp://www.blogger.com/profile/15220828568926183065noreply@blogger.com0tag:blogger.com,1999:blog-3086558728571967180.post-45916552097604550382018-03-28T20:45:00.000-04:002018-03-28T20:45:17.319-04:00Blogging TalkFor this month I have been taking classes in preparation of retirement from my career of nearly 30 years. They teach us a lot of skills for doing things post retirement. It's not common for an employer to provide so much preparation for retirement.<br />
<br />
<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhvp9YAEsF-XQYjI1qJWNV4C69Ntcj7T5RarYMdIAKFwM8agDQFAG0VnT_9RqkoQ2zHthHGwg0hijQlEbKxn4wA0hRAex5nBE1k5zaznyiOIgUGpWUZqSRZ6bU6ElAv1MrUbG5djWwr62E/s1600/20180316_082208.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" data-original-height="900" data-original-width="1600" height="225" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhvp9YAEsF-XQYjI1qJWNV4C69Ntcj7T5RarYMdIAKFwM8agDQFAG0VnT_9RqkoQ2zHthHGwg0hijQlEbKxn4wA0hRAex5nBE1k5zaznyiOIgUGpWUZqSRZ6bU6ElAv1MrUbG5djWwr62E/s400/20180316_082208.jpg" width="400" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">The campus, with a small snow storm moving through that lasted not even an hour.</td></tr>
</tbody></table>
<br />
Today was a panel discussion on writing, publishing, and blogging. The original blogger could not accommodate a revised schedule so I volunteered to talk about my experiences.<br />
<br />
It was fun to tie in the concepts they have been teaching us in class with my experiences over the last few years.Anne Barelahttp://www.blogger.com/profile/15220828568926183065noreply@blogger.com0tag:blogger.com,1999:blog-3086558728571967180.post-81951120987954187172018-03-04T12:54:00.002-05:002018-03-04T12:54:42.427-05:00Book in ProgressFor those following along, I write a book for Maker Media in 2014 - <a href="http://www.amazon.com/gp/product/1457185946/ref=as_li_qf_sp_asin_tl?ie=UTF8&camp=1789&creative=9325&creativeASIN=1457185946&linkCode=as2&tag=lymphomaresource" target="_blank">Getting Started with Adafruit Trinket</a>. It has done fairly well over the years and I thank all who have bought a copy.<br />
<br />
I was contacted 4 months ago about writing a new book on the Adafruit Circuit Playground Express. I said yes so I have been working on that since late November.<br />
<br />
<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgJIRfFXmAktL0vOLz48L5gjUgE6NX6GvEjvzymSr8nSMdnicUZW3wt4EovsHnbvtGt9GR7DgZKzFfKFtU9-xLDCBEz1G5NI-sX-t2A7zr-B3Yj8_GBCdWwXIoJrqhDsawGxqdr2EqW5MM/s1600/CPXCover.png" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" data-original-height="1600" data-original-width="1036" height="400" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgJIRfFXmAktL0vOLz48L5gjUgE6NX6GvEjvzymSr8nSMdnicUZW3wt4EovsHnbvtGt9GR7DgZKzFfKFtU9-xLDCBEz1G5NI-sX-t2A7zr-B3Yj8_GBCdWwXIoJrqhDsawGxqdr2EqW5MM/s400/CPXCover.png" width="258" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">This is NOT the real cover, just a placeholder I mocked up.</td></tr>
</tbody></table>
I'll post more when I can, most of my free time will be writing the book.Anne Barelahttp://www.blogger.com/profile/15220828568926183065noreply@blogger.com0