https://github.com/cvghivebrain/axm68k I made macros for all the Z80 instructions in ASM68k. In order to get certain instructions working (add, and, neg, nop, or & sub) which are shared with 68000, I modified ASM68k (now called AXM68k) to disable them, and then re-enabled them with further macros. I've tested it on Sonic 1's sound driver and Z80 startup code, and it works as expected, but it could do with more thorough testing. "ex af,af'" must be changed to "ex af,af" (without the apostrophe) or ASM68k throws up an error. Every other instruction can be used as-is. You may now delete AS. Credit to MarkeyJester for his help, and AURORA☆FIELDS for the idea.