IBM Personal System/2 Model 80 386 (8580-X21)

Type 8580-X21
Serial 55-NAH59
Manufacturer IBM U.K. Ltd.
FCC ID AN09SA8580-111
Date November 1989

Physical description

Type Floor-standing (print on disk tray 20 MAR 1991, 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 225 W 110-220VAC auto sense, auto-restart (WK. 47/89)

Main board

Manufacturer IBM (many chips have 8942), planar id FEFF
BIOS IBM, Oct. 7, 1987 (128 Kb, chips 1990) REPLACEMENT?
Processor Intel 80386-20 MHz (32-bit), PGA
Coprocessor Intel 80387-20 MHz, PGA ADDITION
Memory 2 sockets for 85ns DRAM cards, parity checked (PS/2 8580 proprietary type)
Max on system board 4 Mb (2 x 2 Mb)
Max. using adapter cards 16 Mb
Bus Micro Channel (MCA) 16/32-bit
Expansion slots 3 x 32-bit and 5 x 16-bit (1 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 2 Mb 85ns on planar (8949 and 9005 on connector), see below for memory card
Controller IBM PS/2 32-bit SCSI Adapter (id 8EFE, 4589 on card, power cables 31/89)
Memory IBM 32-bit 2-8 Mb 80386 memory expansion adapter (id FCFF, chips 9020) w. 4 x 2 Mb 85ns RAM SIMMs (68X6127) ADDITION
Video IBM 8514 display adapter/A (id EF7F, print 8906) ADDITION


Diskette drive 1.44 Mb, 3.5" half-height (Alps DFP723, 92-18) REPLACEMENT
Hard disk Type WDS-3158 (120 Mb) SCSI, 3.5" half-height
2nd Hard disk Type WDS-380 (80 Mb) SCSI, 3.5" slim (chip 8948) ADDITION


Acquisition Summer '98, paid a few $ together w. other appliances, incl. a similar non-functioning 8580-M81 unit which was demolished
Condition Very good (setup needed)
Installed O.S. IBM OS/2 2.0 (Italian)
Modifications Removed token-ring adapter, added 2nd hard drive (taken from mentioned 8580-M81)
Current status All hw working, external of power supply is somewhat rusty
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