>>>>> "RB" == Ruud Baltissen <Ruud.Baltissen@abp.nl> writes:
RB> Hallo Per, I can add at least one simplification to your design.
RB> RAM doesn't care what addresspin is connected to which
RB> addressline.
Ah, of course. That's what I get for designing expansions in the
middle of the night :)
RB> The reason you cannot use this trick with ROMs (like replacing a
RB> 2364 with a 2764) is obvious: you cannot use ROMs programmed by
RB> people using the the original pinouts.
Fortunately there's a 2364 -> 2764 adaptor in every Swedish C64. Quite
handy :)
RB> The simplification is 1) connect RAM-pin 23 (A11) to ROM-pin 21
RB> (A12) 2) connect RAM-pin 2 (A12) to ROM-pin 18 (A11)
I'll add this to the page. Thanks!
--
___ . . . . . + . . o
_|___|_ + . + . + . . Per Olofsson, konstnär
o-o . . . o + MagerValp@cling.gu.se
- + + . http://www.cling.gu.se/~cl3polof/
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