PET keyboard hacking (was Re: Commodore 64-sx Keyboard getting stuck?)

Ethan Dicks ethan.dicks at
Mon Jul 11 20:34:55 CDT 2005

On 7/11/05, Tony Duell <ard at> wrote:
 (don't bother to resolder the shift-lock wires at this stage)

Excellent advice - I melted my PET's capslock switch as a teenager
while replacing the PCB at the back of the keyboard (my brothers and I
wore out the A, 4 and 6 keys playing the ML version of Space Invaders
for hours and hours on end - the gold was _visually_ missing from just
the middle of those three keys).  I still have that keyboard with the
defective caps lock.  :-/

At least I took the opportunity to snarf the old keyboard harness and
build a "wedge" between the new keyboard and the motherboard - I ran 4
lines off the board to an external box with 3 real arcade buttons ($9
each in 1980!) that paralleled the normal A and 4 and 6, so we could
bang away all night and not ruin the _new_ keyboard.


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