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Implied Addressing: Difference between revisions
From SnesLab
(opcode FB) |
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* [[CLI]] (opcode 58) | * [[CLI]] (opcode 58) | ||
* [[CLV]] (opcode B8) | * [[CLV]] (opcode B8) | ||
* [[SEC]] | * [[SEC]] (opcode 38) | ||
* [[SED]] | * [[SED]] (opcode F8) | ||
* [[SEI]] | * [[SEI]] (opcode 78) | ||
* [[XCE]] (opcode FB) | * [[XCE]] (opcode FB) | ||
Revision as of 23:22, 26 June 2024
There are three types of Implied Addressing on the 65c816:
Type 1 - The register(s) to be operated on are implied in the mnemonic: (17 instructions)
- DEX (opcode CA)
- DEY (opcode 88)
- INX (opcode E8)
- INY (opcode C8)
- TAX (opcode AA)
- TAY (opcode A8)
- TCD (opcode 5B)
- TSC (opcode 3B)
- TDC (opcode 7B)
- TSC
- TSX
- TXA
- TXS
- TXY (opcode 9B)
- TYA (opcode 98)
- TYX (opcode BB)
- XBA (opcode EB)
Type 2 - The flag(s) to be operated on are implied in the mnemonic: (8 instructions)
- CLC (opcode 18)
- CLD (opcode D8)
- CLI (opcode 58)
- CLV (opcode B8)
- SEC (opcode 38)
- SED (opcode F8)
- SEI (opcode 78)
- XCE (opcode FB)
Type 3 - Neither flags nor registers operated on: (4 instructions)
All implied instructions except for WDM are one byte long.