Making CD32 Controls for A1200

[Doobrey]

Do you need all the buttons? depends if the game needs them or not..

Anyway, if you've got a multimeter and a CD32 controller  you should be able to figure out what button produces what combination of the 3 inputs.

eg. Button1 only activates the button1 input
but Button4 could activate both 1 and 2, Button 5 activates 1 and 3 etc.

Then adding the extra buttons should only take a couple of diodes for each extra switch.

[Doobrey]

adolescent wrote:
The CD32 controller uses a couple of 74LSxxx chips to handle the extra buttons.  The circuit doesn't look overly complicated so you should be able to source the chips and use the original board as a wiring diagram.

Aha.. don't suppose they'd be a 74ls148 8 to 3 encoder and a 74ls04 hex inverter ? (|or possibly a 74ls00 quad nand instead of the inverter)