[Coco] [Color Computer] Cartridge memory - mapping in and out
Mark McDougall
msmcdoug at iinet.net.au
Tue Oct 30 02:27:24 EDT 2007
James Diffendaffer wrote:
> I take it that means the protos were a waste. Ouch.
Not totally.
I have 2 spare NAND gates and a spare DIP switch on the board. CTS# = A14
NAND A15 - well close anyway. In theory I can have the user put the cart
into "program mode" with a DIPSWITCH and write a ML program to disable
interrupts and program the flash - being careful not to address other logic
in the upper 16K - or can I assert SLENB# to do that?
As for the Flash2 carts, I can do the same in the CPLD, I just need to
sacrifice 1 input to route A15...
%$#&!@^%#$&!@%^$#&!^@%$#&$
--
| Mark McDougall | "Electrical Engineers do it
| <http://members.iinet.net.au/~msmcdoug> | with less resistance!"
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