IBM Personal System/2 Model 50
| Machine Type | 8550-021 |
| Serial | BK55-0231664 |
| Manufacturer | IBM Corp., United Kingdom |
| Date | September 1988 |
Physical description
| Type | Desktop (7 Sep 1988 print inside top cvr, 19 Sep 1988 on disk tray) |
| Dimensions (HxWxD) | 140 x 360 x 420 mm |
| Weight | 9.5 Kg |
| Drive bays | 2 x 3.5" half-height (accessible), 1 x 3.5 or 5.25" half-height (internal) |
| Power supply | 94 W, 90-137/180-265 VAC auto sense (DAT: 27/88) |
Main board
| BIOS | IBM, Feb. 13, 1987 (128 Kb, planar id FBFF, MCA model/submodel FC04) |
| Processor | Intel 80286-10 MHz (16 bit), PGA |
| Coprocessor | Socket for 80287 math coprocessor (DIP) |
| Memory | 2 sockets for 150ns 30-pin SIMMs (PS/2 type), parity checked |
| Max on system board | 1 Mb (2 x 512 Kb - only accepts 512 Kb SIMMs) |
| Max using adapter cards | 7 Mb |
| Bus | Micro Channel (MCA) 16-bit |
| Expansion slots | 4 (16-bit, one w. video ext.) |
| Interface | FDD (2 units) |
| 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 512 Kb 150ns SIMMs |
| Controller | IBM ST-506 Fixed Disk Controller (id DFFD) |
| Emulation | IBM S-36/38 Workst. Emulation Adapter (id FFF8) |
Storage
| Diskette drive | 1.44 Mb, 3.5" half-height (Sony MFD-77W, 1988 35) |
| Hard disk | Model WD-325N (20 Mb), 3.5" half-height |
Trivia
| Acquisition | July 2002, paid a few $ together w. some other appliances |
| Condition | Very good, working |
| Installed sw | IBM PC-DOS ver. 3.30, Italian (now removed) |
| Current status | All hw working |
| Spare parts | Floppy drive |
Peripherals: KEYBOARDS, MONITORS, MICES, PRINTERS
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This page was first
published on the web on Dec. 24, 2002 |