* [[Media:Memptr eng.txt|MEMPTR, esoteric register of the Z80 CPU]] [https://github.com/raxoft/z80test/pull/3 inir/indr/otir/otdr instructions and MEMPTR]
* [[Z80 - undocumented opcodes]]
* [https://popolony2k.com.br/xtras/programming/asm/nemesis-lonestar/8080-z80-instruction-set.html Mapping between i8080 and Z80 mnemonics]
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