IBM Personal System/2 Model 55 SX
| Machine Type | 8555-X61 |
| Serial | 55-PZ973 |
| Manufacturer | IBM Corp., United Kingdom |
| FCC ID | ANO9SA8555SX |
| Date | June 1990 |
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.: 20/90) |
Main board
| Manufacturer | IBM (chips 9011), planar id FBFF |
| BIOS | IBM, Nov. 2, 1988 (128 Kb, sticker 03/05/90) |
| 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 2 Mb 85ns (type 6249) SIMMs |
| Memory | IBM 2-8 Mb 286/386SX mem. expansion adpt. (id. F7F7 [mid-91]) w. 4 x 2 Mb 85ns type 6249 SIMMs (91-14 to 29) |
Storage
| Diskette drive | 1.44 Mb, 3.5" slim (Mitsubishi MF355C) |
| Hard disk | Model WD-387 (60 Mb), 3.5" half-height (cables 21:90) |
Trivia
| Acquisition | Sept. '02, gift (was in a deposit of dismissed appliances) |
| Condition | Very good, working |
| Installed O.S. | Olivetti MS-DOS 5.00 (Italian) |
| Repairs/modifications | None |
| Current status | All hw working |
| Current O.S. | None |
| Spare parts | Almost everything, incl. drives, planar, etc. |
Notes
(*) 80ns SIMMs OK, does not accept 70ns SIMMs.
Peripherals: KEYBOARDS, MONITORS, MICES, PRINTERS
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This page was first
published on the web on Dec. 24, 2002 |