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R. Swan's A72 assembler (8086, self-assembling, 11k .COM) (Developers)

posted by Rugxulo Homepage, Usono, 04.11.2020, 02:40

> > NASM, since 2.15, has "%use masm" for some extra compatibility now.
>
> Macros, weird pseudo-ops (.RADIX, COMMENT, .XLIST, etc.), SEGMENT
> directives, you name it. nasm's masm.mac package --- yes, I just tried it
> --- is pretty minimal, and the documentation admits as much.
It's built in, you don't need a separate "masm.mac" file at all, AFAIK. It does help a fair bit, but yeah, there's still many things it doesn't do (even fairly simple things). I had thought it now had support for displacements like "Blah[4]" and "Whatever[BX+2]", but rechecking yesterday implies no. So that's unfortunate, but it's not the end of the world.

Devore's NOMYSO (Perl) script (MASM/TASM to NASM) handles a few of these things (implicit sizes, weird displacements) but no "Assume" seg overrides. I did test it a bit in DOS with the old 2007 DJGPP port, and it mostly works.

I also wrote a very ugly and flawed AWK script to do most of that for me. I need to improve and rewrite it for various reasons, but it does (mostly) work. (Already done similarly in Sed, which is more limited but easier.)

It's a delicate balance, trying to be generally useful, portable, elegant, and efficient (fast without huge RAM or disk footprint or dependencies). Getting it to minimally work is only half the battle.

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