Mystery UNIBUS Boards?

From: Jason Brady <jrbrady_at_mindspring.com>
Date: Tue Apr 27 00:18:58 1999

Greetings All,

Can you help identify these UNIBUS boards? They were found in a
BA11-K expansion box in a VAX 11/750. The VAX was used to run the
equipment in an MRI trailer. I didn't remove the system and don't
know to what type of equipment it was originally connected.

1) Full size genuine DEC hex board, no "M" number on spine.
    "DIGITAL" and "BSWU-T" etched on front. Two stickers, marked
    "835084" and "4522 117 2760". 93 TTL chips, 18 PAL chips, 5
    DIP switch blocks, two 50-pin connectors for ribbon cables. On
    rear side, "4522 111 91963" etched and a sticker with "PR32.4B"
    and "MB6024ET".

2) Plessey Peripheral Systems quad board. Marked with "P/N 703680-
    100E" on front, "703679-001 REVB" on rear. 7 chips with stickers
    "218 101C, 102C, 103C, 104C, 105C, 100 UK30, UK2A". 62 TTL chips.
    1 50-pin connector with cable to what appears to be an interface
    board (#3 below).

3) 8" by 10" board connected to Plessey board above. 2 50-pin connec-
    tors on top. Etched with "C-FTR", "FDD-FTR", "FTR-FTR". 12 26LS31
    & 32 chips, 10 TTL. Instead of card-edge fingers, has 2 3-level
    male 3x32 pin AMP3485 connectors which plug into corresponding
    female receptacles in BA11-K box (one group of hex slots replaced
    with these).

Any help identifying these boards is appreciated. Doubt I'll ever use
them, but nice to know what they might be!

BTW - Posted this inquiry to comp.sys.dec & alt.sys.pdp11 awhile back
      so it may look familiar.

Thanks,
Jason Brady jrbrady_at_mindspring.com Lynnwood, WA
Received on Tue Apr 27 1999 - 00:18:58 BST