* SHY abs,X and SHX abs,Y (opcodes 9C, 9E) are broken versions of STY abs,X and STX abs,Y
* SHA (zpg),Y and SHA abs,Y (opcodes 93, 9F) are broken versions of SAX (zpg),Y and SAX abs,Y
* NOP # (opcode opcodes 80, 82, 89) are the useless instruction STY #, STX #, STA #* NOP # (opcodes C2, E2) are the useless instructions DEC #, INC #
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