First post, by Moogle!
So OPL2 requires long delays between writes, but is this true for OPL3 devices working in OPL2 mode? I have a motherboard with onboard sound, CMI8330, and Populous and Adtracker II both make hideous noise unless I turn the 8bit I/O Recovery all the way up to '8', whereas The Incredible Machine can work with that setting at '1'. I have noticed this with other sound cards, YMF-262 and otherwise.