We've just updated MediaWiki and its underlying software. If anything doesn't look or work quite right, please mention it to us. --RanAS
Implied Addressing: Difference between revisions
From SnesLab
(opcode 8A) |
(→References: hid archive URL for E&L) |
||
| (13 intermediate revisions by the same user not shown) | |||
| Line 11: | Line 11: | ||
* [[TSC]] (opcode 3B) | * [[TSC]] (opcode 3B) | ||
* [[TDC]] (opcode 7B) | * [[TDC]] (opcode 7B) | ||
* [[TSC]] | * [[TSC]] (opcode 3B) | ||
* [[TSX]] | * [[TSX]] (opcode BA) | ||
* [[TXA]] (opcode 8A) | * [[TXA]] (opcode 8A) | ||
* [[TXS]] | * [[TXS]] (opcode 9A) | ||
* [[TXY]] (opcode 9B) | * [[TXY]] (opcode 9B) | ||
* [[TYA]] (opcode 98) | * [[TYA]] (opcode 98) | ||
| Line 36: | Line 36: | ||
* [[WDM]] (opcode 42) | * [[WDM]] (opcode 42) | ||
All implied instructions except for WDM are one byte long. | All implied instructions on the 65c816 except for WDM are one byte long. They also all only have one addressing mode. | ||
=== | ==== Syntax ==== | ||
* [[Eyes & Lichty]], | <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]] | [[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