Terence wrote:
[...]
> Wolfgang Kern: It seems Wolfgang has seen this numeric-named register
> usage syntax elsewhere too; I wasn't sure if this was or was not
> Herbert's personal syntax. But I didn't come upon it by disassembly,
> but from correspondance by the authors, modifiers or commentors. I'm
> sure it isn't the variant Wolfgang mentions.
Yeah, I've seen FPGA/ASIC designers use this notation sometimes.
I don't remember exact where I saw Numbered Register used first, they may
have entered my world from the 16*16 register-matrix using CDP1802 or any
other long forgotten single chip, or even from early Motorola-based tools.
> It's an interesting syntax, but even if registers are interchangeable
> in usage, it is far easier to have a named reference than a numbered
> reference, so I propose to quickly write a to-from parser between my
> preferred ASM reference usage and the rn, sn syntax
Good idea, but be aware to find some different interpretations of
register-numbers.
ie: Herbert uses a functional logic for ordering: eax,edx,..
while I use the given opcode-patterns: eax,ecx,edx... to match PUSHAD
This syntax may have been an attempt to cover all these 8/16 bit MCs
within one language, but unfortunately x86 and other 'moderns' show
too many specials to fit this very well, although it is more logical.
__
wolfgang
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