[Coco] Super Cartridge

[john dumas]

On 1/15/2013 9:38 AM, Luis Fernández wrote:
>
>
> There is the possibility of having a cartridge that can accommodate all cartridges coco, perhaps with a SD memory and through switches or display can select say 300 and that they pass the address & hC0000 as cartridges true (perhaps read only as rom) and so they can be used by machines without HDBDOS or RGBDOS or Nitros9, or even by machines 4k, 16k, 32k ....
Possible so.
I did something similiar with an Atari 2600 cartridge.
A large flash eprom with the upper addresses controlled by miniature
switches.......

Of course the atari cart is a simpler beast with no interrupt, etc.
And there are only a couple of discrete rom sizes
to emulate......unless you add bank switching hardware,
which I did not. The early, real classic, games didn't use
bank switching and those are what I wanted to play........

No doubt the hardware gurus here could crank out a much
better cart design for the coco.

cheers,
johnd