== Chip Variants ==
The [[GBZ80]] (Sharp SM83) that powers the original [[Nintendo GameBoy]] is kind of an in-between the [[Intel 8080]] and Z80. [https://www.pastraiser.com/cpu/gameboy/gameboy_opcodes.html GBZ80 opcodes]
The Sega Mega Drive, Master System and Game Gear use a standard Z80 CPU. [https://drive.google.com/file/d/1v7H1rwjmYNSpvxWAp74wVIU15RyR0Dry/ Genesis sound software manual] [https://segaretro.org/images/d/d6/SoftwareReferenceManualForSegaMarkIIIEU.pdf Master System reference manual] [https://segaretro.org/images/1/16/Sega_Game_Gear_Hardware_Reference_Manual.pdf Game Gear reference manual]