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

Type 8580-A31
Serial 55-FMNC4
Manufacturer IBM United Kingdom Ltd.
FCC ID AN08580
Date October 1991

Physical description

Type Floor-standing (print on disk tray 23 OCT 1991)
Dimensions (HxWxD) 597 x 166 (318 incl. feet) x 483 mm
Weight 23.6 Kg (8580-041)
Drive bays 2 x 3.5" half-height, 2 x 5.25" full height (1 internal)
Power supply 242 W 110-220VAC auto sense, auto-restart (DAT.: 9144)

Main board

Manufacturer IBM (9143 on chips), planar id FFF9
BIOS IBM, Feb. 15, 1990 (128 Kb, sticker 28/10/91)
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 4 x 32-bit and 4 x 16-bit (2 w. video ext.), 7 available
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 on planar (9127 and 9128 on connector), see below for memory card
Controller IBM PS/2 32-bit SCSI adapter (id 8EFE, stickers 8/8/91)
Memory IBM 32-bit 2-8 Mb 80386 memory expansion option (id FCFF, chips 9133) w. 4 x 2 Mb 80ns RAM SIMMs (68X6127, und.) ADDITION
Video IBM 32-bit XGA-2 display adapter (id FFDA, 9308 on chips) ADDITION


Diskette drive 1.44 Mb, 3.5" half -height (Mitsubishi MF355C, AUG 1991)
2nd Diskette drive 1.44 Mb, 3.5" half -height (Mitsubishi MF355C, AUG 1991) ADDITION
Hard disk Type 0661-371 (320 Mb) SCSI, 3.5" half-height (9014 on chips) REPLACEMENT
2nd Hard disk Model DSAS-3360 (360 Mb) SCSI, 3.5" slim (9419 on chips) ADDITION


Acquisition Summer 2000, paid a few $, was in a deposid of dismissed appliances
Condition Good, working (setup needed because of missing cards)
Installed O.S. OS/2 1.3? (it didn't boot)
Modifications Removed token-ring adapter, added 2nd hard drive, 2nd diskette drive, XGA-2 display adapter and two 2 Mb SIMMs
Current status All hw working
Current O.S. None
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