Generator was written by James Ponder <james@squish.net>

YM2612 chip emulation by Tatsuyuki Satoh
SN76496 by Nicola Salmoria et al

One of:
  RAZE Z80 core, by Richard Mitton (richard.mitton@bigfoot.com)
  Multi-Z80 CPU emulator by Neil Bradley (neil@synthcom.com)
  Portable C version written by Edward Massey