68000 coprocessor board

[Gordon JC Pearce]

On Fri, 2009-05-15 at 23:27 -0400, Mike Loewen 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.  I have a 8" disk for it 
> which has CP/M 68K and some software for switching back and forth between 
> processors (apparently).
> 
> http://sturgeon.css.psu.edu/~mloewen/Oldtech/IMSAI/HSC68K-H.jpg
> http://sturgeon.css.psu.edu/~mloewen/Oldtech/IMSAI/HSCDaughter-L.jpg
> 
>     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.

Well, the daughterboard looks like it takes an EPROM and maps it into
memory somewhere.  There are a couple of octal buffers and a comparator
on there, so presumably you set where it falls in the address space with
the DIP switch.

Gordon