I don't understand the:
DEFB #FD : LD L,A
vs normal instruction
LD IYL,A ; or LD YL,A or LD LY,A, whichever way you prefer
Or how does it relates to "fakes"? These are regular undocumented opcodes. "fake" instructions are something different: https://z00m128.github.io/sjasmplus/...e_instructions.
The \x escapes are somewhere on my TODO list.
About default syntax... :shrug: I didn't design it, I'm not happy with multi-arg for `sub` myself. I may eventually switch defaults in some major-major version, but considering how much whining I get whenever I change something, I'm not in a hurry...

