NES on Playchoice 10 Update

It works! (mostly)

After much trial and error I believe I've found that CHR A13 and CHR /A13 are marked backwards on the Playchoice schematic I have.

So far I've been able to play Super Mario Bros, SMB 3, Castlevania 3, Blaster Master, and others. However, Cobra Triangle, Duck Tales, TMNT and Gauntlet display some graphical hoo-haw. I believe the common denominator is that these carts use their own onboard VRAM, and disable the system's VRAM, which would tell me there's a problem with the VRAM /CE line, or perhaps VRAM A10. They both seem to be wired "correct", but they may not be right on the schematic.

I won't rule out that these cartridges are simply filthy and not making a proper connection, I'll stop at harbor freight tomorrow and see if I can't find a set of bottlecap bits to open them up for a good and proper cleaning.

I'm pretty jazzed with the results so far, and even wired in a power switch to the adapter. If I select another channel on the PC10, I can safely switch carts, reselect the channel and be off to the races.