16 May
2009
16 May
'09
8:04 p.m.
On Sat, 16 May 2009, Gordon JC Pearce wrote:
Sorry, I should have been a bit more clear. The daughterboard plugs
into the Z80 socket on the ZPU board and the Z80 plugs into the socket on
the daughterboard. Here it is in place in the IMSAI:
http://sturgeon.css.psu.edu/~mloewen/Oldtech/IMSAI/IMSAI-05L.jpg
The ribbon cable from the daughterboard plugs into the 68000 board.
Mike Loewen mloewen at cpumagic.scol.pa.us
Old Technology http://sturgeon.css.psu.edu/~mloewen/Oldtech/
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. 
