GW-DEC-1: A New DEC Prototyping Board

Paul Birkel pbirkel at
Thu Aug 15 12:16:13 CDT 2019

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From: cctalk [mailto:cctalk-bounces at] On Behalf Of Noel
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Sent: Thursday, August 15, 2019 12:45 PM
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Subject: Re: GW-DEC-1: A New DEC Prototyping Board

    > From: Paul Birkel

    > But which bus?  There are three ...

So I'm clearly not very awake this morning. I can only think of two major
quad-width DEC standard slots - SPC (UNIBUS) and dual QBUS. What's the third
- PMI? (MUD is hex, as is Fastbus.) Or OMNIBUS, if we're not restricted to



OMNIBUS, yes.  Use case:


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