bit slice chips (was Re: Harris H800 Computer)

Jon Elson elson at
Sat Apr 23 13:28:04 CDT 2016

On 04/23/2016 11:29 AM, Noel Chiappa wrote:
>      > From: Jon Elson
>      > The 11/45 and 11/70 are mostly the same processor. ...
>      > the data paths boards and FPU are the same part numbers
> 'Yes' to the FPP (well, there are two versions, the FP11-B and FP11-C, but
> they are both identical in the two machines).
> 'No' to the data paths, though: e.g. the M8100 in the /45 (the board with the
> 74S181's on it) is replaced by the M8130 in the /70. The two are _very_
> similar, but I suspect not interchangeable (examing the prints shows minor
> differences).
OK, didn't know that!


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