Sunday, January 8, 2023

Upgrading the IBM PC/AT to MS-DOS 6.22 and Windows 3.1

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 You read this correctly. What a software upgrade. My floppies for Windows/286 seem damaged. so... Going from MS-DOS 5 to MS-DOS 6.22 Once I...

Getting the IBM PC/AT to Recognize a 1.44MB Hard Disk

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Lots of time this week getting my IBM PC/AT up to speed. Here's a synopsis: Getting a New Compact Flash Hard Drive Instead of the XT-IDE...
Tuesday, January 3, 2023

Getting a non-functional IBM PC/AT up and running is hard

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 It's been a long time without posts. Maybe I can correct this. A couple months ago, I took the plunge and got an IBM PC/AT. I've wa...
Sunday, February 17, 2019

Using EGA and VGA video cards in IBM 5150 PC, 5155 Portable, and 5160 PC/XT Machines

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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...
Saturday, February 9, 2019

Documentation for the Paradise Systems MGC II 8-bit MGA/CGA/Composite Video Card

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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. F...
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IBM Portable PC 5155 Video Connection

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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 portab...
2 comments:
Thursday, January 24, 2019

The IBM PC 5150: Part 7 - The Hard Disk Controller

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Continuing from part 6 of my teardown of a one owner IBM PC 5150 from the 1980s. Here is the controller card supporting a half-sized h...