Regarding the 6502 instruction set linked in the article, please mind that this list doesn't cover any of the "illegal opcodes", which matters for the VCS, AKA

Regarding the 6502 instruction set linked in the article, please mind that this list doesn't cover any of the "illegal opcodes", which matters for the VCS, AKA Atari 2600, as these were/are often used to optimize the instruction count of game kernels. (Author of that page here.)