[Coco] MPI Design

[Brian Goers]

On 1/11/2015 10:34 PM, RETRO Innovations wrote:
> I decided that a first step to understanding the Coco IO would be to 
> design an MPI for at least my benefit,
<Many lines deleted>
> Is there value in doing a 6 or 8 or larger MPI?  It's trivial to do, 
> but the IO above takes up all of a 9572 IO, and each additional slot 
> takes 1 SCS, 1 CART, 1 CTS, 1 switch line, and 1 LED line (5 lines), 
> so if the design should handle 6 or 8 slots, I need to cut down on the 
> number of address lines coming in (maybe restrict it to 8 and use the 
> MPI trick of leveraging a '30 to grab address lines 8-15 when high.
>
> Also, any source for the PCB mount 20/40 connectors?
>
> Jim
card edge connectors, 2 rows of 20.
Search for Part # 395-040-520-202. Manufacturer EDAC.
Mouser has some.

-- 
  Brian Goers
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