PDP-11/70 Boards

Henk Gooijen henk.gooijen at hotmail.com
Mon Nov 29 14:18:55 CST 2021

Van: Jay Jaeger via cctalk<mailto:cctalk at classiccmp.org>
Verzonden: maandag 29 november 2021 21:05
Aan: cctalk at classiccmp.org<mailto:cctalk at classiccmp.org>
Onderwerp: Re: PDP-11/70 Boards

On 11/29/2021 7:32 AM, Ed C. via cctalk wrote:
> Dear list, I'm currently restoring a PDP-11/70 system and need the
> following boards to complete the CPU:
> FP11-C slots:
> M8127
> M8128
> M8129
> Cache slots:
> M8142
> M8143
> M8144
> M8145
> Any help finding these is appreciated. Thanks.

So, it turns out that I *do* have an FP11-C.  My PDP-11/45 with the
KB11-D processor in it has an FP11-C.  So, at the least, I would need to
try and figure out if the boards in it right now are the ones that came
with it [This is what my notes from 1989/1990 say], or are my spares,
and, at the least one of the two M8126 boards is marked "Bad".


I think the FP11 boards are not essential for the 11/70
They only add hardware FP support.
However, I think that the cache boards are essential.
Not sure the 11/70 will work without them.

Henk, PA8PDP

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