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Accumulator Addressing

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There are six instructions that support Accumulator Addressing on the 65c816. They are:

ASL (opcode 0A)
DEC (opcode 3A)
INC (opcode 1A)
LSR (opcode 4A)
ROL (opcode 2A)
ROR (opcode 6A)

In this admode, the accumulator is the operand.^[3] They all are one byte long.

Syntax

ROR
RORA
ROR A

Interestingly, XBA is not considered to use accumulator addressing.

See Also

Reference

Eyes & Lichty, page 387: https://archive.org/details/0893037893ProgrammingThe65816/page/387
page 126, lbid: https://archive.org/details/0893037893ProgrammingThe65816/page/126
section 3.5.8 of 65c816 datasheet, https://westerndesigncenter.com/wdc/documentation/w65c816s.pdf

Clark, Bruce. http://www.6502.org/tutorials/65c816opcodes.html#5.6

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