[Coco] Cartridge memory - mapping in and out

[Mark McDougall]

Robert Gault wrote:

>  If you want to be sure the cart ROM is readable, you will have best 
> success with a short ml program that forces the ROM mode and transfers 
> the data from $C000-$DFFF to lower memory, say $4000-$5FFF. Return the 
> Coco3 to the normal all RAM conditions and then check the contents of 
> $4000-$5FFF.

Thanks for the detailed explanation Robert, much appreciated!

I need to actually address the *real* cartridge at $C000, because I need to 
write to the flash chip on the board. Is there any reason why POKE 65502,0 
(switch to ROM mode) isn't sufficient to do this? It would appear I can at 
least read the cartridge contents from $C000 using this POKE...

Regards,

-- 
|              Mark McDougall                | "Electrical Engineers do it
|  <http://members.iinet.net.au/~msmcdoug>   |   with less resistance!"