[Coco] GIME behavior

[Darren A]

On 4/13/11, Mark Marlette  wrote:
> Darren,
> Are you sure $ff90 is write only? You got me wondering now....I don't think
> it is...Can I change my position? :)
>
> A peek of $ff90 should reveal data.....Ok, just tore down my test setup in
> the lab and did a quick peek at ECB powerup.
>
> $ff90 = $7e at powerup. That looks correct per the memory map in the service
> manual.
>

---

Yes, I'm pretty certain that $FF90 is write-only.  Using PEEK on a
CoCo 3 will return $7E for any IO address that doesn't produce data
(unless the address is below $FF7F and you have an MPI attached).

Darren