Originally Posted By byuu
Spent about 14 hours on the problem, I can't come up with anything to perfectly emulate ( http://board.byuu.org/viewtopic.php?f=16&t=614 ), so if you wanted to port the S-CPU stuff you may as well do so now ... up to you, though.

also, I start to think many of the remaining problems in the driver (but not all) reside in the CPU timing and opcodes... hence, a core which handles 99% of the cases properly would definitely help to single out the remaining problems in video and machine code.