RE: How to design non-trivial cartridges for c-64?
Date: 2007-05-22 20:19:25

Zitat von Rainer Buchty <>:

> On Tue, 22 May 2007, Scott McDonnell wrote:
> > Aren't we assuming that only one cartridge at a time is being used?
> Can you safely assume that? Think of IDE or CMD interfaces, SuperCPU 
> etc. Would you unplug that for the sake of some other peripheral?
> > But, yes, it should be possible to decode the $DE00-$DEFF and 
> > $DF00-$DFFF addresses even further using a bit more complex circuitry.
> Decoding is cheap these days. Just use some GAL or CPLD. It only becomes 
> complex if all you have is a bunch of 74138 and 139.

I still don't know how to "select", in my circuirty, what memory location my 
cartridge ought to use. What if I want to build a cart that uses memory from 
$deb6 to $deba? And how does the cart "know" when I poke something in these 
memory locations to do something?


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