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Immediate Addressing: Difference between revisions
From SnesLab
(opcode E9) |
(opcode 49) |
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* [[ADC]] (opcode 69) | * [[ADC]] (opcode 69) | ||
* [[SBC]] (opcode E9) | * [[SBC]] (opcode E9) | ||
* [[EOR]] | * [[EOR]] (opcode 49) | ||
* [[AND]] | * [[AND]] | ||
* [[ORA]] | * [[ORA]] | ||
Revision as of 14:10, 27 June 2024
Immediate Addressing is when the data to be operated on directly follows the opcode in the instruction steam. The immediate data is generally preceded by a # in the assembler source.
Supported by the following instructions:
- ADC (opcode 69)
- SBC (opcode E9)
- EOR (opcode 49)
- AND
- ORA
- LDA (opcode A9)
- LDX (opcode A2)
- LDY (opcode A0)
- CMP (opcode C9)
- CPX (opcode E0)
- CPY (opcode C0)
- BIT (opcode 89)
- SEP (opcode E2)
- REP (opcode C2)
- ADD (Super FX)
On the SPC700, "imm" means "8-bit immediate data."[4]
See Also
Reference
- Eyes & Lichty page 397, https://archive.org/details/0893037893ProgrammingThe65816/page/n423
- lbid, page 108: https://archive.org/details/0893037893ProgrammingThe65816/page/n134
- Labiak page 209: https://archive.org/details/Programming_the_65816/page/n219
- https://archive.org/details/SNESDevManual/book1/page/n226