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swiss vintage comput...
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Vintage computing
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Hardware based on pr...
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6502
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The designers figure...
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The designers figured that you'd use X and Y for looping, indexing etc, and use A for adding and subtracting, shifts etc. So they saw a need for INX and INY, but didn't see a enough of a need for an instruction to increment or decrement the accumulator.
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6502
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Hardware based on processors
65C02
rene.bauer
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The designers figured that you'd use X and Y for looping, indexing etc, and use A for adding and subtracting, shifts etc. So they saw a need for INX and INY, but didn't see a enough of a need for an instruction to increment or decrement the accumulator. > Later, with the 65C02, the instruction you are talking about was added, and variously called INA, INC A or INC)