[Coco] Two I/O cartridges for sale,

[Mark D. Overholser]

On 9/27/2014 18:42, tim lindner wrote:
> Two I/O cartridges for sale, from Marty Goodman's collection.
>
> The two full height cartridges are packaged in a metal case.
>
> They each contain two 6821 (or equivalent) PIAs.
>
> The PIAs are addressed from $FF70 to $FF77. They are hand made, with
> point to point wiring on the bottom side of the board.
>
> On one end of the board is the expected CoCo cartridge connector. The
> other end is 40 pin ribbon cable connector.
>

Is there a Schematic available for these boards???

I am still fairly new to these CoCo machines..

MarkO