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The PS/1 was IBM's return to the home computing market. It was the successor to the IBM PCjr, although it was compatible with IBM's bussines systems. The PS/1 was a propriatary system at first, but standard components were used later on. The later models included "Rapid Resume" a standby feature.
The system uses a LPX form factor (layout). Everything was built into the motherboard and had a four expansion slots of 16bit ISA but on a riser card. The memory was 72pin simms.
For the 486SX model for example, the CPU is integrated onto the motherboard but there is a socket3 that is empty. Apparently it is possible to put in another 486 CPU and the system disables the built-in CPU, which is not possible with the 386 model.
The software was Windows 3.1 and MS-DOS 6.2 on these systems. There is a bootloader from IBM that let you select ether to boot into DOS or Windows.
Contributors : Nick, Leland
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END OF PRODUCTION
full stroke keyboard with numeric keypad and function keys
Original model: Intel 80286 Later models: 386sx, 486sx, 486dx, 486dx2
Original model: 10 MHz Later models: from 10 MHz to 66 MHz
Original model: 512 KB (max. 1 MB) Later models: from 1 MB to 64 MB
Original model: VGA modes Later models: sVGA modes
Parallel port, ISA slots
BUILT IN MEDIA
3.5'' Floppy disc drive + optional hard disk depending models
originally PC-DOS 4.01, later IBM-DOS
Power supply built-in
printer, expansion unit, hard drives, 5.25'' disk drive, etc.