Welcome to the 65xx resources.
Here you will find detailed information about some processors of the 65xx series. Especially the 6502 document provides a deep look into the internal behaviour of the processor. Also you will find an illegal opcode list which has been validated for being 100% several times now. The other documents only extend the 6502 document with additional information. They do not completely describe all opcodes.
6502/6510/8500/8502 Opcodes
65C02/65SC02 Opcodes
65CE02 Opcodes
65816 Opcodes
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Last change on 30/1/2009. For comments contact Graham