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  • Tags: Digital computer hardware

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Massive processor for servers, includes separable heat sink and stored in original antistatic plastic transport case.
Multiple chips are mounted to a board that is fastened to an aluminum mounting frame which includes ribbon cables and two…

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Large circuit board; motherboard configuration.
Includes 6 PCI slots, 8 memory slots (filled), processor heat sink, serial and parallel cable connectors.
Front of board marked with 'digital' logo and '5420674-01'
front and back of board marked: …

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Large circuit board with 2 locking plastic insertion handles, 5 back plane connectors. Aluminum heat sink attached to one processor; two additional LSI processor chips.
Heat sink has sticker that reads:
Part #: 21-35023-21
Revision: A
Date Cde:…

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Power supply board, in original box; appears unused.
Box marked '9905439 Rev B 11/80'.
Board marked: '50007271-P2 Side 2'.
Very large capacitors and other components attached.

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Large circuit board with 2 locking metal insertion handles, and ribbon cable connector on one end; 4 back plane connectors on other.
Edge of board includes various markings, including:
'5404-01-B1' and 'LPWR' followed by the 'digital' logo, and…

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Large circuit board with 2 locking metal insertion handles,. 4 back plane connectors.
Edge of board includes various markings, including: '4MB Q22 MOS MEM PAR' and 'M7127', and
'5017547-01-C1-P2' and 'M7551-CA'.
'LPWR' followed by the 'digital'…

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Large circuit board
Board marked 'LPWR' and 'Diceon' and '94-0',
'M7135' and '5015381-01-C1' along with other various designations.
4 back plane connectors and two metal locking insertion handles.

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Large circuit board with 4 plastic insertion handles, one marked 'M7127'. 4 back plane connectors.
Edge of board marked with side designations (Side 1 and Side 2), with additional markings including: 'Serial Bus Port Module' and 'M7127', along…

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Large circuit board modified to be a wall clock (cut out and modified with addition of a small quartz clock movement).
Board marked 'LPWR' and 'GS-2' and 'digital' logo, along with other various designations.
4 back plane connectors and two locking…

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Large circuit board with additional board attached (screws removed, hinge attached).
Has 6 back plane connectors, two locking insertion handles, and 4 ribbon cable connectors.
Board marked 'Side 2 32K Stack Board' and '5011643B' and…

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Circuit board.
Two chips center-marked with 'PROTO'.
End of board marked with '50-21531-01 A1' and 'OCT-10 94V-0' and '29591'.
Extensive dust covering back from use.

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Circuit board with EPROM chip insertion extension at end.
Two chips center-marked with 'PROTO'.
End of board marked with '50-21531-01 A1' and 'OCt-10 94V-0' and '29591'.
extensive modification to circuitry has been performed in the form of added…

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Circuit board.
'Flip-Chip' and 'Control Board A1' marked on board along with the following groups of markings: '5009263E', '5409264', 'CS *' and the letter series of A-Z; and 'ATC2131580E'.

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Circuit board with clear poly covering indicator lights and 4 switches.
''Maintenance Board 2 W131C' marked on board

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Circuit board with extended connector
''Maint. BD-1 W130B' marked on board

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Circuit board with small handle. ' NAND Gate R121A' and 'I 67' marked on board; 'R121' marked on handle.
'Digital Equipment Corporation Maynard Massachusetts' marked on insertion handle edge.

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Bare backplane for connection of System Building Blocks including power connectors. Label applied to back reads '901 Model 2/26/61'. Sticker applied to front reads 'O.K. Inspected by (DLC in pen) Date: (9/12/61 in pen) Digital Equipment…

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System Building Block in enclosure. Pulse Generator 3410 marked on front; number stamped '18418' front top.

'Digital Equipment Corporation Maynard Massachusetts' marked on back.

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System Building Block in enclosure. Flip-Flop 3201 marked on front; number stamped '15863' front top, label applied to front marked 'C'.

'Digital Equipment Corporation Maynard Massachusetts' marked on back.

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System Building Block in enclosure
Inverter 3101 marked on front; number stamped '21236' front top.

'Digital Equipment Corporation Maynard Massachusetts' marked on back.