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Computer Card Identification Help Please

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vtsteam:
I'm trying to identify an industrial computer bus type --  probably 80's era.

Typical plug-in static memory card (AYCAD CMS 04 256BH) measures  12" x 6-1/2" (not including edge card contacts -- 6-3/4 deep with them).

The 12" long edge shows two sets of edge card contacts:

One is 86 contacts with spacing of 0.15", and the second is 60 contacts with a spacing of .010"

Any ideas what bus this is?

Andrew?  :scratch:

awemawson:
Picture Steve would help.

Sure those are 0.15 and not 0.156 spacing?

vtsteam:
Nope, not sure at all, Andrew. Brought neither my specs, nor a camera to work today. Getting forgetful and still refuse to carry a phone in the pocket.

So, yup probably .156!


More info:

1.) The motherboard backplane connector has only the 86 contacts.

The 60 contact strip on the card goes to a separate board, so the 86 contact bus is the one of interest. Ignore the 60 contact mis-info.

2.) AYCAD seems to be a French brand name.

AdeV:
The only bus I can find which matches that spec is the Intel Multibus 1; 43/86 edge contacts @ 0.156" spacing.

Spec: http://bitsavers.trailing-edge.com/pdf/intel/_busSpec/9800683D_Intel_Multibus_Specification%20Jun82.pdf
(see page 4.4, aka p40 in the PDF)

Wikipedia's sparse page on it: https://en.wikipedia.org/wiki/Multibus

HTH!

awemawson:
It was Multibus that I had in mind but I was fairly certain it was 0.156 pitch. So we need that pitch confirming Steve  :thumbup:

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