IBM Personal System/2 Model 65 SX

Machine Type 8565-121
Serial 55-CZ597
Manufacturer IBM United Kingdom Ltd.
Date June 1990

Physical description

Type Floor-standing (print on disk tray 19 JUN 1990, print inside side panel 060690)
Dimensions (HxWxD) 597 x 166 (318 incl. feet) x 483 mm
Weight 23.6 Kg
Drive bays 2 x 3.5" half-height (both accessible), 2 x 5.25" full height (one accessible)
Power supply 242 W 90-137/180-265 VAC auto sense, auto-restart (DAT.: 24/90)

Main board

Manufacturer IBM (planar id E3FF)
BIOS IBM, Feb. 8, 1990 (128 Kb, sticker 21/6/90)
Processor Intel 80386SX-16 MHz (32-bit) PQFP
Coprocessor Socket for optional i80387SX
Memory 2 sockets for 100ns 72-pin SIMMs, parity checked (PS/2 type)
Max on system board 8 Mb (2 x 4 Mb)
Max. using adapter cards 16 Mb (about 15 Mb usable)
Bus Micro Channel (MCA) 16-bit
Expansion slots 8 (all 16-bit, 1 w. video ext.)
Video Integrated 16-bit VGA display adapter (256 Kb, max. 320x200 x 256 colours or 640x480 x 16 colours)
Interface FDD (2 units)
Ports PS/2 keyboard, PS/2 mouse, serial (UART 16550), parallel, VGA


Installed RAM 2 x 2 Mb 85ns SIMMs (65X6249) on planar, plus 8 Mb on Memory card (below)
Memory IBM 1-8 Mb 80286 memory expansion adapter (id F7F7, chips 9148) w. 4 x 2 Mb SIMMs (65X6249, two 91-49, one 92-43, one has 9129 on chips) ADDITION
Controller IBM 16-bit SCSI Adapter (id 8EFE, print 30/3/90, cables 25 JUN 1990)


Diskette drive 1.44 Mb, 3.5" half-height (Mitsubishi MF355C, APR 1990)
Hard disk Model WDS-3158 (120 Mb) SCSI, 3.5" half-height
2nd Hard disk Model WDS-3158 (120 Mb) SCSI, 3.5" half-height ADDITION


Acquisition Mid-2000, bought for a few $ together w. some other appliances, including PS/2 system units and 8514 monitors
Condition Very good, working
Installed sw None
Repairs/modifications Removed token-ring adapter, added second hard disk, memory card w. SIMMs (it had only 4 Mb)
Current status All hw working
Current O.S. IBM PC DOS 5.00 (Italian)
Spare parts Almost everything except cabinet


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. 21, 2004