[Coco] Coco flash cartridge

Steve Bjork 6809er at bjork-huffman.net
Wed Sep 19 23:42:25 EDT 2007


At 08:31 PM 9/19/2007, you wrote:
How does the address decoding work for a 32K cartridge??? IIUC CTS# 
decodes $C000-$FFEF, so decoding $8000-$BFFF would contend with the 
mainboard ROMS?!?

When you tell port $FF90 on a CoCo 3 that ROM mapping is 32k external 
(except for vectors), the CTS decodes for $8000-$FFEF.

That's all there is to it.

Steve




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