x86 architecture 1 byte opcodes (sandpile.org)

I don't understand, without further description of the symbols.

Need a couple of instructions for accessing memory (and possibly loading immediates) but otherwise seems like a perfectly adequate general-purpose instruction set. Might be fun (for some values of "fun") to write a compiler backend for it.

Hello sizecoders ;)

Additional resources:

http://www.sizecoding.org/wiki/DOS

A nice PDF with similar content:

https://pnx.tf/files/x86_opcode_structure_and_instruction_ov...

What does the 0eh comment mean?

A reverse engineer friend once taught me I could patch an x86 function with `0xEBFE` to get the CPU to spin forever. It wasn’t until much later that I understood that (IIRC) 0xEB is the “single byte” jump instruction and that of course 0xFE is -1 as a signed byte. Hence the spin.