I think he's referring to his bsnes emu.
For the 100th time, Rushing Beat has problems with the CPU timing, not the mul/div ... guess it doesn't even use that feature.
Anyway ... I've recently tried
Brandish 2 on MESS ... there's a funny bug right at the beginning of the game on which the soldiers goes out of a door ... MESS emulates this by making them going in *erratic* directions ... I don't even know if it's logic or video related