ACT and CMI Unibus boards

Matt Burke matt at
Wed Apr 29 18:01:07 CDT 2015

On 28/04/2015 23:44, shadoooo wrote:
> Hello,
> just received some Unibus boards, some are from ACT, one from CMI.
> I would identify these boards.
> The first is a big hex board, marked ACT 10046: on front side has two
> 50pin connectors,
> plus two female edge connectors on the left side (some sort of narrow
> bus extender?).
> There are some resistive terminators onboard near one of the 50pin
> connectors.
> Very strange board...
> The second is a quad board marked ACT 10039: it has four 40pin
> connectors,
> two on front and two on a side.
> The last is for sure a RAM board, as it includes an array of 16x9
> HM4716 ICs, with a total of 128KW.
> It's from CMI ON 207-010-300 and it has a lot of wire-wrap  jumpers
> for configuration.
> Anybody has some knowledge over these boards?
> Thanks
> Andrea
ACT is Able Computer. See if you can identify the boards using this

There may be some appropriate manuals in the parent directory.


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