4 month ago
deusx : pagetable.com » Blog Archive » How MOS 6502 Illegal Opcodes really work - "The original NMOS version of the MOS 6502, used in computers like the Commodore 64, the Apple II and the Nintendo Entertainment System (NES), is well-known for its illegal opcodes: Out of 256 possible opcodes, 151 are defined by the architecture, bu
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