The Walsh Computer Technology
Computer Collection Web Pages

There is "new technology", and there is "high technology".
An IBM MCA machine is still a "high technology" computer.
-"Speedfrog" Bill from CSIPH

Welcome! These pages contain information on IBM Personal System/2 Model 25 computers as well as some MCA and PS/2 related hardware information. I've also posted some pages about a few of the various PS/2 and Microchannel clone systems I own, both now and in the past. (Unfortunately, my collection was heavily damaged in a 2004 flood caused by the negligent behavior of city administration. Many things could be saved, some could not and others slipped away before I knew one way or the other. Ever since that time, updates to this page have best. As such, many things have fallen into disrepair. I make no claim that information here will be updated on any kind of a schedule, or even at all.)

Please feel free to drop me a line. I may not always be the quickest to respond, but I love to read e-mail and will reply as soon as I can! Should you not get a reply, please check your spam filter or junk e-mail folder.

I am always looking for PS/2s, Microchannel hardware and any Microchannel clones that are in need of new homes. If you're located in the US and have such things, send me an e-mail through the link above. Likewise, if you have PS/2 or Microchannel software, manuals or any other resources...drop me a line!









PS/2s I Own

Miscellaneous Information

Microchannel & PS/2 Projects

Model 25/Eduquest (Info Page & Pics)
(includes clock battery information)

Digital EtherWorks Stuff

Model 30 (286 and 8086)

Other PS/2
Related Links

(many of which are long gone)

Novell NE-32 Adapter Info

The "Turbo 30" Project

9595 Ardent Tools of
V2 Adaptation

(not really even vaguely maintained, but still useful)

Arco AC-1070 MCA IDE
Adapter CD-ROM
Drive Support

Model 33 "E"

Shiva FastPath 5 Information

(updated July 2018)

Hacking Drive Rails
for Models 40, 57, and 77

Model 35SX
Model 35SLC
Model 40SX

Computers Featured In My
Collection Are NOT For Sale

Kingston SXNow!
Upgrade Information

Model L40SX

Check the PS/2 Links section for
much more useful info!

AOX MCMaster 286>386
Upgrade Instructions and

Models 50 and 50Z
Model 50 w/ Reply Board

Illustrated L40SX
Notebook Disassembly Guide

PS/2 Note N51SX
Model 53

Telxon Wireless MCA NIC
info and outline...

Model 55SX

Pure Data ArcNet

Model 56SLC

Fan Replacement For The
Kingston TurboChip 133

Model 56SLC3

IBM Model M Keyboard
Modification Info

(required on some newer motherboards)

Model 57SLC

MPG123 For AIX on RS/6000

Model 57SLC2 486

My Thoughts On Various MCA
Cards and Related Hardware

Model 60 

Look here for selected items!
Look here for everything from
the former IBM PCCBBS!

Model 65SX - Unit 1
Model 65SX - Unit 2

IBM PS/2 Schematics!

Model 70 (E61)

Model 70 (A21)

Model P70 (8573-121)

Model P75 (8573-401)

Model 76 (Lacuna)

Model 76 (Bermuda)

Model 77 (Bermuda)

Model 77 (Lacuna)

Model 77 (Ultimedia Lacuna)

Model 80
Model 80 with CORE ESDI Disks & Controller

Model 85

Model 90
Model 95
PS/2 Server 95
PS/2 Server 95A
PC Server 500
Non IBM Microchannel Architecture Machines
NCR System 3300
Reply Model 32
IBM 6152 Academic System
IBM 7186 (Black Cased P70)

















Contents Copyright 1997-2019 by Walsh Computer Technology. Some Rights Reserved. Last Updated: 08/25/2019, previously updated 05/03/2015.

A word about Copyright, bandwidth and other good to know information: I generally don't believe in being an ass when it comes to using my materials for other projects or taking copies/making mirrors. I believe it is far more important that people can continue to benefit from any information or illustration I have posted here than it is to be a real stickler about copyright. Nevertheless, these pages, my original text, original photographs are copyrighted material. You may freely copy or distribute any of these items or use them in your own work. However, no costs are to be charged for access to this information, except for reasonable duplicating, media or access time costs. No advertising of any sort is to be displayed alongside these items. You may not use these works in any for-profit enterprise without getting my written permission.This includes eBay auctions. If you want to use these items in a for-profit enterprise or project, please ask my permission. I'll probably give it to you unless you're doing something illegal, of bad taste, dangerous or immoral. Note that nothing here may be used to violate any law or endanger any person. If you do this, I will ask you to remove the items you have used that belong to me. If you do use material from this site, please credit the authors. A link back to the page where the materials you are using are located would be nice, but is not required.

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