AGEMAME HQ

Well, the various callback changes have finally persuaded me to stop maintaining a separate copy of the whole Scorpion 2 driver, so I’ll start pushing things about to make it match MPU4 a bit better. Speaking of which, I could really do with amending that wire-OR in the driver at present, since the 6809 PTM IRQ line connects into the same trace. Watch this space, I haven’t gone near that timer code in a while, and there’s probably a few things I’d like to clean up while I’m there.