68000 coprocessor board

[Ethan Dicks]

On Fri, May 15, 2009 at 11:27 PM, Mike Loewen
<mloewen at cpumagic.scol.pa.us> wrote:
>
>   I'm trying to find some documentation for an HSC C016 processor board,
> which came with an IMSAI 8080 I acquired.  It has a Motorola 68000 8MHz
> processor, and connects to a Cromemco ZPU board in the IMSAI via a small
> daughterboard which plugs in underneath the Z80A...
>
> http://sturgeon.css.psu.edu/~mloewen/Oldtech/IMSAI/HSC68K-H.jpg
> http://sturgeon.css.psu.edu/~mloewen/Oldtech/IMSAI/HSCDaughter-L.jpg

Nice board.

>   I've been able to find only a few references to this board, and no
> documentation.  Does anyone here have experience with this setup, or know
> where to find docs?  Thanks.

I have no information and no docs on this board, but I know a bit
about the 68000.

The daughter card should be easy enough to untangle - it's just an
address comparator, a couple of buffers and the off-board connectors.
If I had that rig, the first thing I'd do is to draw a schematic of
the daughter card at least, to understand how data gets off the ZPU.

-ethan