Strange Qbus cards: Data Systems Design and Marconi

From: Fred N. van Kempen <>
Date: Fri Oct 3 17:50:40 2003


One of the results of today's 400mi drive is a box of Qbus cards that
once were in custom PDP-11 based systems in use at various locations
at Marconi. Most are the usual suspects found in such systems, but
there's also a bunch of weird ones:

- two Data Systems Design cards.. half-height, some RAM, some PROMs
  and a fair bit of logic. One 16Mhz xtal. One connector (28 pins
  or so)

- a bunch of what look to be custom-made boards, with the Marconi
  label and typing. M-12 and such.

Does anyone know more about these?

Fred N. van Kempen, DEC (Digital Equipment Corporation) Collector/Archivist
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Received on Fri Oct 03 2003 - 17:50:40 BST

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