[Coco] CoCo3: banking in ROM-Packs

[Ciaran Anscomb]

Barry Nelson wrote:
> Mindroll is a 32k type 2 ROM if I remember correctly.

It runs on a CoCo1/2 and uses the bank-switch register, so "type 34"
according to your list, I think.

Verified with XRoar's experimental GMC support.  Runs, and "plane"s 2-10
seem to work, but "plane 1" seems to just be an infinitely long corridor -
anyone know if that's expected?

..ciaran