IBM Personal System/2 Model 80 386 (8580-A31)

Type 8580-A31
Serial 55-FDAW7
Manufacturer IBM United Kingdom Ltd.
FCC ID AN08580
Date March 1991

Physical description

Type Floor-standing (20 MAR 1991 print on disk tray)
Dimensions (HxWxD) 597 x 166 (318 incl. feet) x 483 mm
Weight 23.6 Kg (8580-041)
Drive bays 4 (2 accessible); 2 x 3.5" half-height, 2 x 5.25" full height
Power supply 242 W 110-220VAC auto sense, auto-restart (DAT.: 9023)

Main board

BIOS IBM, 8 Sept. 1989 (128 Kb, chips 1990), planar id FFF9
Processor Intel 80386-25 MHz (32-bit) PGA
Coprocessor Intel 80387-25 MHz, PGA ADDITION
Cache 64 Kb
Cache controller Intel 82385
Memory 2 sockets for 80ns DRAM cards, parity checked (PS/2 8580 proprietary type)
Max on system board 8 Mb (2 x 4 Mb)
Max. using adapter cards 16 Mb
Bus Micro Channel (MCA) 16/32-bit
Expansion slots 8 (7 available): 4 x 32-bit and 4 x 16-bit (2 w. video ext.)
Interface FDD (3.5", 720 Kb or 1.44 Mb)
Video Integrated 16-bit VGA display adapter (256 Kb, max. 320x200, 256 colours or 640x480, 16 colours)
Ports PS/2 keyboard, PS/2 mouse, serial (UART 16550A), parallel, VGA


Installed RAM 2 x 4 Mb 80ns 33F5498 modules on planar (9020 on chips), see below for memory card
Controller IBM PS/2 32-bit SCSI adapter (id 8EFE, stickers 27/6/90, cables 38/90)
Memory IBM 32-bit 2-8 Mb 80386 memory expansion option (id FDDF, 1991) w. 4 x 2 Mb 85ns RAM SIMMs (68X6127) ADDITION


Diskette drive 1.44 Mb, 3.5" half -height (Alps DFP723, 90-49)
2nd Diskette drive 1.44 Mb, 3.5" half -height (Alps DFP723, 90-49) ADDITION?
Hard disk Type 0661 (320 Mb) SCSI, 3.5" half -height (chips 9048)
2nd Hard disk Type 0661 (320 Mb) SCSI, 3.5" half -height (chips 9040) ADDITION


Acquisition Mid-98, collected in a dump together w. other appliances
Condition Good, setup needed because of missing cards
Installed O.S. IBM OS/2 version ?? (didn't boot)
Modifications Removed token-ring adapter, added second hard drive
Current status All hw working, disk tray and power supply are slightly rusty
Current O.S. IBM OS/2 1.30 (US English)
Spare parts Almost everything, incl. drives, planar, etc.


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This page was first published on the web on Nov. 11, 2001
Last revised Oct. 22, 2004