[Coco] FW: CoCO EPROM -- 32K test??

[Darren A]

On Sat, Dec 13, 2014 at 5:08 PM, Chad H <chadbh74 at hotmail.com> wrote:
>
> Well that would be the point..to have a replacement ECB or whatever in the
> cartridge to run INSTEAD of the internsl ROMs..  Question remains...how to
> pull it off.
>
>

Here is a diagram of a circuit that should work. I haven't actually tested
it so use at your own risk.

<https://flic.kr/p/qpa3XC>

Note that because it decodes the ROM address space completely on its own
(instead of relying on CTS*) the following restrictions apply:

1. For use on CoCo 1 or 2 only.
2. Prevents the CoCo from operating in Map Type 1 (All RAM).
3. Will not play nice with other ROM cartridges in an MPI.

Darren