IBM Personal System/2 Computers

I have two IBM PS/2 computers, a Model 25 and a Model 30 286. I’ve combined them on this page.

Model 25

This is potentially the ‘cutest’ computer IBM made: the Personal System/2 Model 25. It is, in effect, an XT in a somewhat more efficient form factor.

I got this particular example in 2011 from an e-recycler who was going to scrap it. I bought a few items during that visit; in the end this worked out to pocket change less than $5. Cool find, especially in working condition. My original goal was to use it for a case mod but now I’m not sure I have the heart to kill it.

The original Alps FDD (notorious for failure) has been swapped in favour of the newer Sony type. To do this, I had to make a custom cable. Additionally, the Kyocera MFM hard drive had apparent head crash damage, so it and the WD1002A-WX1 controller card were swapped out in favour of an XT-IDE with ATA hard drive. To power the drive, I made a cable to borrow the power from the integrated proprietary hard drive interface.

  • Branding: IBM 8525-001, Personal System/2 Model 25
  • Form factor: all-in-one desktop
  • Processor: Siemens SAB 8086-2-P
  • Chipset:
  • Graphics: onboard MCGA with monochrome CRT
  • RAM: 512K
  • HDD: Western Digital WD75AA 7.5GB ATA66 via XT-IDE
  • Removable media: Sony 2.88M PS/2 FDD
  • I/O: PS/2 keyboard and mouse, DB25 serial, DB25 parallel, 1/4″ headphone jack, Western Digital WD8003/W Ethernet card
  • Power:
  • Acquired: bought from e-recycler in 2011
  • Cost: pocket change

Model 30 286

Here we find what seems to be a relatively common example of ISA PS/2s: the Model 30 286.

I received this computer for free after posting a wanted ad on the local Kijiji classifieds site seeking an “old IBM computer”, specifically citing the XT. I first received the Model 56 SX, and then a bit later this machine.

This machine doesn’t really do much, but I did get it online and have been working on trying to get Arachne to run on it. It presently hangs without an apparent cause, so it’s something to work on when I have time. The PSU makes a buzzing sound when turned off; I’m told there is a line filter which may need replacement. The hard drive that was in it when I received it was a Miniscribe 8450 attached to an Adaptec ACB-2072. The drive failed after a lengthy file transfer operation and has since been replaced by a Quantum ProDrive 1225S attached to an Adaptec AHA-1540CF SCSI controller. The performance increase was enormous.

  • Branding: IBM 8530-E01, Personal System/2 Model 30 286
  • Form factor: desktop
  • Processor: Intel 80286-10
  • Chipset:
  • Graphics: onboard VGA
  • RAM:
  • HDD: Quantum ProDrive 1225S 1.2GB SCSI via Adaptec AHA-1540CF
  • Removable media: Mitsubishi 1.44MB PS/2 FDD
  • I/O: PS/2 keyboard & mouse, DB25 serial, DB25 parallel, VGA, AHA-1540CF SCSI, D-Link DE-220PT 10Mb/s Ethernet
  • Power: proprietary Delta PSU
  • Acquired: 2008-2009
  • Cost: $0