IBM PS2 Model 8525 v.4 Upgrades

preview_player
Показать описание
Again another series of videos that I will eventually splice into one large vid. The upgrade of a stock IBM PS/2 Model 25.
  1. Havoc Sun
  2. IBM Model 25
  3. IBM Model 8525
  4. Upgrade Memory & add Hard Disk
  5. PS2 Model 25
Рекомендации по теме
IBM PS2 Model 0:04:49

IBM PS2 Model 8525 v.4 Upgrades

IBM PS/2 Model 0:03:30

IBM PS/2 Model 25 COLOR VGA w Mouse M keyboard 8525

Checking RAM on 0:30:55

Checking RAM on the IBM PS/2 Model 25!

IBM Personal System 0:18:32

IBM Personal System / 2 Model 25 (PS/2). Upgrade and expansion info. - SIMPLETHINGSTOYS

IBM PS/2 Model 0:30:05

IBM PS/2 Model 25 Restoration Part 1

Unwrapped #39: IBM 0:15:34

Unwrapped #39: IBM 8525 (PS/2 Model 25) Quickie

IBM PS/2 Model 0:13:56

IBM PS/2 Model 25 CRT Limits

What came after 0:10:54

What came after the PS/2 and PS/1? My IBM PC300 and Aptiva PCs

PiBM PS/2 Model 0:05:18

PiBM PS/2 Model 25 Fabrication

IBM PS/2 Model 0:06:43

IBM PS/2 Model 25 MCGA/VGA Output

IBM PS/2 Model 0:02:23

IBM PS/2 Model 25 Earphone to Line Level

IBM PS/2 Model 0:04:31

IBM PS/2 Model 25 Hook Repair - Take 2

IBM Booting 0:00:58

IBM Booting

IBM's Education All-In-One 0:09:26

IBM's Education All-In-One from 1987

LGR - Restoring 0:21:42

LGR - Restoring a 1987 IBM PS/2 Model 30

Checking the PS/2 0:21:56

Checking the PS/2 Model 53SLC2 Reference Diskette 'POST/BIOS Save/Restore'

IBM Model 25 0:21:17

IBM Model 25 CPU Upgrade

IBM Model 25 0:26:22

IBM Model 25 Hard Drive Install

IBM System Information 0:25:15

IBM System Information Tool running on IBM PS/2 Model P70

Rinascita del Mouse 0:00:57

Rinascita del Mouse Vintage: edizione IBM PS/1 & PS/2! 🐭 🖥️

Fixing a PS/2 0:09:18

Fixing a PS/2 Model 25-286 with a crowbar

Using OS/2 on 0:17:37

Using OS/2 on the IBM PS/2 Model 70 - Part 3

Prince of Persia 0:04:28

Prince of Persia with IBM PS/2 P70 Portable and OPL3LPT sound.

PS/2 Model 25 0:12:59

PS/2 Model 25 286 Swap Update + Looking at some IDE cards.

Комментарии
Автор

One last post; I believe the version of dos these would have shipped with was PC-DOS 3.3 (IBM branded MS-DOS 3.3).

cnoyes
Автор

Hey man, nice machine! I have a PS/2 model 25 and a model 25/286. Your ram looks to be fully populated, and it's possible it might not count the full 640KB without running the diagnostic disk. I upgraded my PS/2 model 25's 8086 processor to a NEC V30 (it's a very easy upgrade and a good speed boost). I also have a Soundblaster card and an an external SyQuest EZ flyer 160MB hard drive. I may be able to help you with the hard drive interface cable as I have one in each of my computers but only 1 20Mb hard drive, but not until I get an XT-IDE Compact Flash hard drive in one of my units. The diagnostic / setup disk can be downloaded from the Walsh computing website.

SIMPLETHINGS
Автор

For memory expansion to 640K, you'll need to add the last 128K via some chips (four DIP-18 and two DIP16). This requires four 4464-15 or 41464-15 chips and two 4164-15 chips (the -15 is the speed of 150ns; faster speeds will work fine). Jameco has these for a pretty nominal price.

cnoyes
Автор

I'm pretty sure that hard drive from the 8550 will not work. The hard drive interface on the 8525 is an XT-IDE connection. Aside from the actual IBM part, a Seagate ST-351a/x will also work (you'd have to mod the power connector since IBM put power into the interface connection). An easier option might be to get one of those lo-tech compact flash adapters. a 1GB flash card is going to be so much more reliable and cost effective than a used old hard drive.

cnoyes