Programming for the Gameboy/LR35902 CPU architecture

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The LR35902 is a Z80/8080-like CPU used inside of the Gameboy and Gameboy Color. It is somewhat similar to the two, but has enough differences that you cannot simply treat it as a Z80 or 8080.

Page conventions

Assembly conventions[edit | edit source]

All real register names are capitalized, i.e. register A or SP
16-bit constants in a instruction are represented as nn
8-bit constants in a instruction are represented as n