This is a guide to the 56 3-letter codes that make up the 6502 instruction set. The 6502 is an 8-bit processor that forms the heart of such (once) popular computers as the Atari 800 and the Commodore 64. The chip still has its uses, as can be seen on the link collection at
(I will add explanations to each of the codes, have a bit of patience please)