I wrote to someone who wrote an article on this once and here is his reply:
Quote:
I'll see if I can update the Four Score and take a new photo of it, but I
added a couple of switches and wires to one so that I could toggle between
NES and Famicom games.
If I recall correctly... I cut the tracers on the PCB between D0 and the
IC for P2 and P4, then added a switch to connect them when I wanted to
play US games. In the other position, I had wires go from the switch down
to the underside of the NES, into the expansion port's D1 lines for PORT1
& 2. To plug them in, I busted an old PCB-gripping floppy drive connector
in half, then wedged it into the slot. To make it look nice, I eventually
installed those wires run into a stereo jack I installed on the front of
the NES.
The other switch ran CLK to the P2 and P4 controller ports... With US
games, the IC send 8 CLKs to P1, then another 8 to P2, but since we need
them at the same time on both ports for Japanese games, this fixes that
problem.
Hope you're only going to want to use this with Famicom games...
