RE: Where to start on Missile Command PCB repair

Nice work so far, Grant. Here is where you can find images showing how to
"strap" _Missile Command_ boards for different EPROMs:

http://www.ionpool.net/arcade/atari/MC2708.jpg
http://www.ionpool.net/arcade/atari/MC2716.jpg

You can modify each one of the 4164 RAM chips to "behave" like a 4116.
How to use a 4164 chip instead the original 4116:

  a.. Bend pin 1 und 8 upwards so they no longer go into the socket's
connectors.
  b.. Connect Pin 8 and 9 with one another through a short piece of wire.
  c.. Make sure pin 1 and 8 are not in contact with any other components
nearby.
  d.. Insert the chip like this into the socket.
(Some gamers who own Williams games like _Defender_ have zillions of these
RAMs to modify, and it's a lot easier for them to just modify the board
rather than all the chips. _Missile Command_ doesn't have very many, and
that's why I like to just upgrade the chips instead.) You do not have to
change any jumpers on the _Missile Command_ motherboard for this.

I don't have a _Missile Command_ board within arm's reach right now, but the
crystal is probably labeled "X1" on the motherboard. It looks like a small
rectangular silver can. (Unless it's missing!)

Hope this helps!

Matt J. McCullar

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Received on Thu Oct 31 19:53:10 2013