Following on from Astrocade hardware, I thought I would like to do a core as near as possible from scratch. So apart from using the Z80 from opencores, and basing the timing code on that used in the Pacman core, I went from the Crazy Balloon schematics to produce a complete core for it. Where the documentation is good enough, the analogue sounds are also done correctly, but since it uses the SN74677 sound chip and does things to it not even mentioned in the manual. I ended up sampling my cab for those three sounds
