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Absolute Long Addressing

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Revision as of 13:11, 1 August 2024 by Xetheria (talk | contribs) (Undo revision 19255 by Xetheria (talk) despite the very similar name this link is actually to absolute Indirect Long Addressing)

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Absolute Long Addressing is supported by ten instructions:

ADC (opcode 6F)
SBC (opcode EF)
AND (opcode 2F)
ORA (opcode 0F)
LDA (opcode AF)
STA (opcode 8F)
EOR (opcode 4F)
CMP (opcode CF)
JMP / JML (opcode 5C)
JSR / JSL (opcode 22)

All are four bytes long. This is what the various operand bytes represent:

low byte of absolute address (byte within page)
high byte of absolute address (page number)
bank number

Syntax

LDA long

See Also

References

Eyes & Lichty page 385, https://archive.org/details/0893037893ProgrammingThe65816/page/385
section 3.5.7 of 65c816 datasheet, https://westerndesigncenter.com/wdc/documentation/w65c816s.pdf
Clark, Bruce. http://www.6502.org/tutorials/65c816opcodes.html#5.16

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