IBM Personal System/2 Model 80 386 (8580-A21)

Type 8580-A21
Serial 55-ADZF4
Manufacturer IBM United Kingdom Ltd.
FCC ID ANO9SA8580-111
Date September 1990

Physical description

Type Floor-standing (print inside side panel 26 4 90, print on rev of front panel 260990)
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 (WK. 36/90)

Main board

BIOS IBM, Nov. 21, 1989 (128 Kb, chips 25/4/90), 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) 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 33F5498 modules on planar (9020 and 9024 on chips), see below for memory card
Controller IBM PS/2 32-bit SCSI adapter (id 8EFE, stickers 9/8/90)
Memory IBM 32-bit 2-8 Mb 80386 expansion option (id FCFF, chip 9031) w. 4 x 2 Mb 85ns RAM SIMMs (65X6249, one 2190, two 28-90) ADDITION


Diskette drive 1.44 Mb, 3.5" half -height (Alps DFP723, 90-29)
2nd Diskette drive 1.44 Mb, 3.5" half -height (Alps DFP723, 90-29) ADDITION?
Hard disk Type WDS-3158 (120 Mb) SCSI, 3.5" half-height
2nd Hard disk Type WDS-3158 (120 Mb) SCSI, 3.5" half-height ADDITION


Acquisition Sept. 99, paid a few $ together w. some other appliances, incl. a similar 8580-A16 which was in poor condition and had been demolished
Condition Very good, working, setup needed because of missing cards
Installed O.S. IBM OS/2 2.1 (Italian), hardly booting
Repairs/modifications Removed token-ring adapter, added two 2 Mb SIMMs to memory card (it had 2 x 2 Mb only), and 2nd hard drive (taken from mentioned 8580-A16 unit)
Current status All hw working, power supply is slightly rusty
Current IBM PC-DOS 4.00 (US English)
Spare parts Almost everything, incl. drives, planar, etc.


Back to Systems Listing
Back to PCs Main Page
Back to Home page

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