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Immediate Addressing: Difference between revisions
From SnesLab
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* [[LDA]] (opcode A9) | * [[LDA]] (opcode A9) | ||
* [[LDX]] (opcode A2) | * [[LDX]] (opcode A2) | ||
* [[LDY]] | * [[LDY]] (opcode A0) | ||
* [[CMP]] | * [[CMP]] | ||
* [[CPX]] | * [[CPX]] | ||
Revision as of 14:01, 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
- EOR
- AND
- ORA
- LDA (opcode A9)
- LDX (opcode A2)
- LDY (opcode A0)
- CMP
- CPX
- CPY
- 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