Personal System/2 Model 25 Information and Software

System Type: 8525-001 or 8525-004

The IBM PS/2 Model 25 was released in 1987: its target market was geared towards schools and home users. This was especially signified by the use of ISA instead of MicroChannel: allowing existing home users to use their ISA cards without having to purchase new MicroChannel ones.

The all-in-one form factor was inspired from the competing Macintosh systems which came out in 1984.

 

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Key Features

If you have Model 25, I would advise upgrading it with a NEC V30 & Intel 8086-2 Math Co-Processor. Try to find a Model 25 already configured with a HDD and 1MB of RAM-- as finding the proprietary HDDs or HDD bays is very difficult.

Since there are only two ISA bays to work with, you will have to decide between the following:
Sound Card, Hard Disk Drive controller (if the proprietary HDD needs to be replaced), VGA card (if you need to override the MCGA for better VGA support).

Note: use a null modem with a serial or parallel port so you don't use one of the ISA slots up.

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