Well, good to know for the futureAh, sorry, you'll need WinCUPL:
I'll make a JED file a bit later.
I think it was an insertion issue. Like I just happened to reinsert it wrong only when on normal Ketsui a few times in a row last night but perfectly for each Trap attempt. Today I booted it up in trap, then swapped the jumper over without removing the PCB and everything works fine sound-wise. Still crashes of course. Ha.The Trap version of Ketsui uses exactly the same sound EPROMs, and the bus configuration doesn't change. I assume you tried cleaning contacts, wiggle the cartridge?
PA20_I = PA20; PA21_I = 'b'0; <===
PA21_I = 'b'1; <===
Got it. Original gal, add resistor, hopefully everything works as expected originally.To make the jumper work you need the original GAL. If the resistor fixes the problem you can use the jumper (or a small switch) to switch between versions.