>>>>> "DG" == Daniele Gratteri <daniele_gratteri@inwind.it> writes:
MV> 6264's are 8K Static RAM (SRAM) chips that are almost pin compa-
MV> tible with 2364 ROM chips. This enables you to solder the 6264 on
MV> top of the ROM chip (aka piggy-backing) and just rewire 6 pins,
MV> instead of having to wire all 28. It's a quick and dirty solution,
MV> but it works.
DG> Just a question: with these chips piggy-backed on the ROMs, is
DG> possible to use cartridges or will be some conflicts?
It depends on the cartridge -- 8K carts only use block 5 ($a000-
$bfff), but bigger ones can use block 1, 2 or 3. This RAM expansion
will use blocks 1 and 2, but there's nothing that's keeping you from
adding an enable/disable switch. Personally I'll probably have it
selectable between block 1+2 or block 3+5 and write protected.
--
___ . . . . . + . . o
_|___|_ + . + . + . . Per Olofsson, konstnär
o-o . . . o + MagerValp@cling.gu.se
- + + . http://www.cling.gu.se/~cl3polof/
-
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