Clue (USA).md glitches

[benderscruffy]

[jsgroth]

I've tested this game before - this seems to be a timing issue between the 68000 and VDP DMA/FIFO timing. The glitch doesn't always occur, and it used to occur much more frequently before I added approximate emulation for 68000 memory refresh delays.

Not sure if the fix is just more accurate 68000/VDP timing or if this game is hitting some timing edge case that I'm not accounting for. My guess is that it needs more accurate timing emulation.