Subj : (16 bit) x86 Assembler lessons?
To   : All
From : Bob Worm
Date : Wed May 28 2025 16:21:58

Ey up, all.

I've been rooting through some old 16 bit x86 code and I now realise I've been doing ARM for so long that x86 has become like a foreign language to me. I'm OK with the normal MOVs and arithmetic stuff but once I get into more obscure opcodes, particularly ones that assume their operands are in a certain registers, I soon end up with 50 tabs open. There seems to be little consistency in where the operands need to be instruction by instruction, maybe there's a rule I'm just not seeing? Or maybe my brain can only handle reduced instruction sets these days :)

Can anyone recommend a decent resource to get me back up to speed (it's only been 30 years)? I have a couple of train / plane journeys coming up so something downloadable would be ideal.

Thanks in advance,

BobW
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