Re: 2114 chips needed?

From: MagerValp (
Date: 2001-01-08 17:42:05

>>>>> "DG" == Daniele Gratteri <> writes:

MV> the least amount of chips and wires possible, which is why I'm
MV> piggy-backing 6264's onto the kernal and basic rom. I'm also
MV> thinking about

DG> I also have got a VIC-20 I want to expand in the simplest mode.
DG> Can you tell me what are 6264's chips? I don't know how the VIC-20
DG> works very well...

I'll try to write something up when I'm done. The current projects on
Funet all require logic chips and a small PCB, I'm aiming for just
wires and memory chips.
  6264's are 8K Static RAM (SRAM) chips that are almost pin compa-
tible with 2364 ROM chips. This enables you to solder the 6264 on top
of the ROM chip (aka piggy-backing) and just rewire 6 pins, instead of
having to wire all 28. It's a quick and dirty solution, but it works.
  The Vic-20 is a *very* simple computer, almost everything is done
with standard 74xx logic chips. Check the scematics on Funet,

    ___          .     .  .         .       . +  .         .      o   
  _|___|_   +   .  +     .     +         .   .  Per Olofsson, konstnär
    o-o    .      .     .   o         +
     -       +            +    .
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