CPU : 68000 @ 20 MHz

Sound CPU : Z80

Sound Chip : ICS2115 32 Channel PCM

Protection : ARM asic cpu with internal code (on most later games)

Hardware Features : 1 scrolling 8x8 tiles 4bpp scrolling tilemap, 32x32 tiles 5bpp scrolling tilemap with linescroll, arbitrary size 5bpp sprites, zoom and shrink capabilities.

Notes : PGM, short for PolyGameMaster, was developed by IGS to go head to head against the neogeo.

The later Cave games use a single board system instead of the cartridge system, and use a custom bios. Emulators : MAME - Nebula

