so it seems there are undocumented features in mpasm
> This link includes a stkadj function, but I don't know if it's the
> same stkadj you're finding (it's being used in some table lookup code)
No, it's some kind of internal macro, the comment says 'pseudo-instruction'
I think its used for critical stack depth analysis (mplink has a -g flag to "generate the report file for stack analysis", but didn't found any doc)
> And here's a use of FUSTART -- I've got *no* idea what it's being used
> for (from context, I wouldn't be surprised if you came back and told
> me that this is the code you found it in!)
More or less... C18 libc, still; IMHO is a marker to emit a COFF function
something (there's also FUEND).