UNIBUS memories

UNIBUS memory cards are available both from DEC, and from a number of outside vendors who produced and sold UNIBUS main memory cards. All the early UNIBUS memory was core; the first DRAMs did not appear until some time after the UNIBUS itself did. The DEC memories were invariably available in both parity, and non-parity, versions.

DEC

Core memory

• MM11-B core memory
• MM11-C core memory
• MM11-D core memory - 32-Kbyte
• MM11-E core memory - 8-Kbyte
• MM11-F core memory - 8-Kbyte (also MM11-FP)
• MM11-K core memory - 8-Kbyte
• MM11-L core memory - 16-Kbyte (also MM11-LP; ME11-L, MF11-L, MM11-S)
• MM11-U core memory - 32-Kbyte (also MF11-U)
• MM11-Y core memory

MOS memory

• MS11 32KB MOS memory - MS11-E, -F, -H, -J models (8, 16, 24, 32 Kbytes)
• MS11-L MOS memory - (64, 128, 192, 256 Kbytes)
• MS11-M MOS memory - (128, 256 Kbytes) - used non-standard voltages

Plessey

Core memory

• PM-1116B core memory - 32-Kbyte (maximum)

MOS memory

• PM-S1132 MOS memory - 64-Kbyte (maximum)

See also

• Repairing un-documented MOS memory boards