The GameBoy Programming Manual (z80)

[NanoWar]

http://de.scribd.com/doc/39999184/GameB ... ing-Manual

Chapter 4 (page 84) holds CPU instruction set and hey... the GameBoy has a z80 so this is a great tutorial that explains all instructions in our beloved z80 .

[Madskillz]

Hmm cool find.

That's pretty awesome indeed, but it seems you can't download it without an account?

[NanoWar]

I think this is it: http://www.romhacking.net/documents/544/

Ah, so it is.