Access did this for their RealSound games (Mean Streets, Crime Wave, Martian Memorandum, Echelon, World Class Leader Board, Links, possibly others). The PWM playback code didn't call the old int08 for obvious reasons, but kept track of how much the clock got behind with every digitized sound played, and they adjusted the DOS clock accordingly on program exit. I also recall another game (can't remember the name) that restored the DOS clock on exit by reading the time directly out of the CMOS RTC (ports 70h/71h) and setting the DOS time with the data.
Originally Posted by reenigne
Offering a bounty for:
- Music Construction Set, IBM Music Feature edition (has red sticker on front stating IBM Music Feature)