* [[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]]
* [[Media:Z80-Instruction-List-with-T-states.pdf|Instruction List with T-States]]
<br>