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Z80
,/* Chip Variants */
== Chip Variants ==
The [[GBZ80]] (Sharp SM83) that powers the original [[Nintendo GameBoy]] is an in-between the [[Intel 8080]] and Z80. [https://gbdev.io/resources.html Awesome Gameboy resources] [https://gbdev.gg8.se/wiki/ GBDev wiki] [https://emudev.de/ Emudev (q00.gb)]
* The Nintendo documentation does not mention M-cycles or T-states at all. They only mention CPU cycles, which are always equal to 4 T-states (this is the equivalent of NOPs in the CPC world). Also, the GBZ80 has different timings than the Z80. For example, CALL nn takes 6 cycles on the GBZ80, but only 5 NOPs on the Z80. [https://archive.org/details/GameBoyProgManVer1.1/ Gameboy programming manual]
