The [[GBZ80]] (Sharp SM83) that powers the original [[Nintendo GameBoy]] is an in-between the [[Intel 8080]] and Z80. [https://gbdev.io/pandocs/CPU_Comparison_with_Z80.html Source] [[Media:GBCPUman.pdf|Game Boy CPU Manual]] [https://gekkio.fi/files/gb-docs/gbctr.pdf Game Boy complete technical reference] [https://youtu.be/GBYwjch6oEE Reverse engineering the Game Boy hardware] [https://youtu.be/HyzD8pNlpwI The Ultimate Game Boy Talk]
However, the Sega Master System and Game Gear use a standard Z80 CPU. [https://segaretro.org/images/d/d6/SoftwareReferenceManualForSegaMarkIIIEU.pdf Reference manual for Sega MarkIII] [https://segaretro.org/images/1/16/Sega_Game_Gear_Hardware_Reference_Manual.pdf Reference manual for Game Gear]
The [[KC Compact]] uses the U880, which is an unlicensed clone of the Z80 manufactured by MME. It was the most widely used microprocessor in the German Democratic Republic. [https://en.wikipedia.org/wiki/U880 Source]