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Implied Addressing: Difference between revisions
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There are three types of '''Implied Addressing''' on the [[65c816]]: | There are three types of '''Implied Addressing''' on the [[65c816]]: | ||
'''Type 1''' - The register(s) to be operated on are implied in the mnemonic | '''Type 1''' - The register(s) to be operated on are implied in the mnemonic: (17 instructions) | ||
* [[DEX]] | * [[DEX]] (opcode CA) | ||
* [[DEY]] | * [[DEY]] (opcode 88) | ||
* [[INX]] | * [[INX]] (opcode E8) | ||
* [[INY]] | * [[INY]] (opcode C8) | ||
* [[TAX]] | * [[TAX]] (opcode AA) | ||
* [[TAY]] | * [[TAY]] (opcode A8) | ||
* [[TCD]] | * [[TCD]] (opcode 5B) | ||
* [[TSC]] | * [[TSC]] (opcode 3B) | ||
* [[TDC]] | * [[TDC]] (opcode 7B) | ||
* [[TSC]] | * [[TSC]] (opcode 3B) | ||
* [[TSX]] | * [[TSX]] (opcode BA) | ||
* [[TXA]] | * [[TXA]] (opcode 8A) | ||
* [[TXS]] | * [[TXS]] (opcode 9A) | ||
* [[TXY]] | * [[TXY]] (opcode 9B) | ||
* [[TYA]] | * [[TYA]] (opcode 98) | ||
* [[TYX]] | * [[TYX]] (opcode BB) | ||
* [[XBA]] | * [[XBA]] (opcode EB) | ||
'''Type 2''' - The flag(s) to be operated on are implied in the mnemonic: | '''Type 2''' - The flag(s) to be operated on are implied in the mnemonic: (8 instructions) | ||
* [[CLC]] | * [[CLC]] (opcode 18) | ||
* [[CLD]] | * [[CLD]] (opcode D8) | ||
* [[CLI]] | * [[CLI]] (opcode 58) | ||
* [[CLV]] | * [[CLV]] (opcode B8) | ||
* [[SEC]] | * [[SEC]] (opcode 38) | ||
* [[SED]] | * [[SED]] (opcode F8) | ||
* [[SEI]] | * [[SEI]] (opcode 78) | ||
* [[XCE]] | * [[XCE]] (opcode FB) | ||
'''Type 3''' - Neither flags nor registers operated on: | '''Type 3''' - Neither flags nor registers operated on: (4 instructions) | ||
* [[NOP]] | * [[NOP]] (opcode EA) | ||
* [[STP]] | * [[STP]] (opcode DB) | ||
* [[WAI]] | * [[WAI]] (opcode CB) | ||
* [[WDM]] (opcode 42) | |||
=== | All implied instructions on the 65c816 except for WDM are one byte long. They also all only have one addressing mode. | ||
* [[Eyes & Lichty]], page 398 | |||
==== Syntax ==== | |||
<pre> | |||
CLC | |||
</pre> | |||
=== See Also === | |||
* [[Accumulator Addressing]] | |||
* [[Immediate Addressing]] | |||
=== References === | |||
* [[Eyes & Lichty]], [https://archive.org/details/0893037893ProgrammingThe65816/page/398 page 398] | |||
* [https://archive.org/details/0893037893ProgrammingThe65816/page/127 page 127], lbid | |||
* section 3.5.19 of 65c816 datasheet, https://westerndesigncenter.com/wdc/documentation/w65c816s.pdf | |||
* Clark, Bruce. http://www.6502.org/tutorials/65c816opcodes.html#5.15 | |||
[[Category:ASM]] | [[Category:ASM]] | ||
[[Category:Addressing Modes]] | [[Category:Addressing Modes]] | ||
[[Category:Simple Admodes]] | |||
[[Category:Inherited from 6502]] | |||
Latest revision as of 13:41, 8 August 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 (opcode 3B)
- TSX (opcode BA)
- TXA (opcode 8A)
- TXS (opcode 9A)
- 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 on the 65c816 except for WDM are one byte long. They also all only have one addressing mode.
Syntax
CLC
See Also
References
- Eyes & Lichty, page 398
- page 127, lbid
- section 3.5.19 of 65c816 datasheet, https://westerndesigncenter.com/wdc/documentation/w65c816s.pdf
- Clark, Bruce. http://www.6502.org/tutorials/65c816opcodes.html#5.15