IBM Personal System/2 Model 55 SX


Machine Type 8555-041
Serial 55-KADC1
Manufacturer IBM Corp., United Kingdom
FCC ID ANO9SA8555SX
Date February 1992

Physical description

Type Desktop
Dimensions (HxWxD) 102 x 406 x 397 mm
Weight 8.65 Kg
Drive bays 2 x 3.5" half-height, both accessible
Power supply 90 W, 110-220VAC (DAT.: 06/92)

Main board

Manufacturer IBM (chips 9151), planar id FBFF
BIOS IBM, Nov. 2, 1988 (128 Kb)
Processor Intel 80386SX-16MHz (32-bit) PQFP
Coprocessor Socket for optional i80387SX Math coprocessor
Memory 2 sockets for 85ns 72-pin SIMMs (PS/2 type), parity checked (*)
Max on system board 8 Mb (2 x 4 Mb)
Max. using adapter cards 16 Mb (about 15,5 Mb usable)
Bus Micro channel (MCA) 16-bit
Expansion slots 3 (16-bit, one w. video ext.)
Interface HDD (ESDI), FDD
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

Cards

Installed RAM 2 x 4 Mb 80ns SIMMs (one 9134 on chips and another 3691 on card)

Storage

Diskette drive 1.44 Mb, 3.5" slim (Alps DFR723, 91-52)
Hard disk Model WD-3158 (120 Mb), 3.5" half-height (cables WK 47:91) UPGRADE (**)

Trivia

Acquisition Mid-98, paid ca. 25$ together w. 8515 monitor, keyboard, mouse, manual & ref. disk
Condition Very good, working
Installed O.S. IBM PC-DOS 7.00, MS Windows 3.1 (Italian)
Repairs/modifications Removed 3270 emulation card
Current status All hw working
Current O.S. IBM PC-DOS 5.0 (Italian)
Spare parts Almost everything, incl. drives, planar, etc.

Notes

(*) 80ns SIMMs OK, does not accept 70ns SIMMs.

(**) Replaces original 40 Mb unit.


Peripherals: KEYBOARDS, MONITORS, MICES, PRINTERS


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

013