Producer: IBM - Category: Storage
Expansion unit, 1983, IBM. The 5161 Expansion Unit is a second case, the same size as the IBM PC system unit, that adds eight expansion slots and two drive bays to a PC or XT through an extender card and a receiver card connected by a thick cable. It was sold with a 10 MB fixed disk to give the PC a hard disk, and it could hold a second one. This unit is configured with two hard disks.
| Years | 1983 to 1987 |
| Slots | 8 (one used by the receiver card) |
| Storage | 2 x 10 MB full-height hard disks |
| Connection | extender card in the PC, receiver card in the unit, 62-pin cable |
| Power | own 130 W power supply |
| Price (1983) | US$1,995 with a 10 MB disk |
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