UNIBUS memories

UNIBUS memory cards are available both from DEC, and from a large number of outside vendors who produced and sold UNIBUS 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-L - 16-Kbyte
• MM11-U - 32-Kbyte

MOS memory

• MS11 - -E, -F, -H, -J models (8, 16, 24, 32 Kbytes)
• MS11-L - (64, 128, 192, 256 Kbytes)

Plessey

Core memory

• PM-1116B - 32-Kbyte (maximum)

MOS memory

• PM-S1132 - 64-Kbyte (maximum)