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INC (SPC700): Difference between revisions
From SnesLab
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|[[Direct Page Addressing | Direct Page]] | |[[Direct Page Addressing | Direct Page]] | ||
|AB | |AB | ||
|2 | |2 bytes | ||
|4 cycles | |4 cycles | ||
|+ | |+ | ||
|[[Direct Page Indexed by X]] | |[[Direct Page Indexed by X]] | ||
|BB | |BB | ||
|2 | |2 bytes | ||
|5 cycles | |5 cycles | ||
|+ | |+ | ||
| Line 50: | Line 50: | ||
|[[Carry Flag|C]] | |[[Carry Flag|C]] | ||
|+ | |+ | ||
| | |N | ||
|. | |. | ||
|. | |. | ||
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|. | |. | ||
|. | |. | ||
|Z | |||
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|} | |} | ||
'''INC''' is an [[SPC700]] instruction that increments | '''INC''' is an [[SPC700]] instruction that increments its operand by one. | ||
==== Syntax ==== | ==== Syntax ==== | ||
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INC X | INC X | ||
INC Y | INC Y | ||
</pre> | |||
The above are official, but some people prefer alternate mnemonics like: | |||
<pre> | |||
INA | |||
INX | |||
INY | |||
</pre> | </pre> | ||
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* [[INX]] | * [[INX]] | ||
* [[INY]] | * [[INY]] | ||
* [[ADC (SPC700)]] | |||
* [[ADC]] | |||
=== External Links === | === External Links === | ||
* Official Super Nintendo development manual on INC: [https://archive.org/details/SNESDevManual/book1/page/n232 Appendix C-7 of Book I] | * Official Super Nintendo development manual on INC: [https://archive.org/details/SNESDevManual/book1/page/n232 Appendix C-7 of Book I] | ||
* anomie: https://github.com/yupferris/TasmShiz/blob/master/spc700.txt#L445 | |||
[[Category:ASM]] | [[Category:ASM]] | ||
[[Category:SPC700]] | [[Category:SPC700]] | ||
[[Category:Addition and Subtraction Commands]] | [[Category:Addition and Subtraction Commands]] | ||
Latest revision as of 14:00, 30 July 2024
| Basic Info | |||||||
|---|---|---|---|---|---|---|---|
| Addressing Mode | Opcode | Length | Speed | ||||
| Accumulator | BC | 1 byte | 2 cycles | ||||
| Direct Page | AB | 2 bytes | 4 cycles | ||||
| Direct Page Indexed by X | BB | 2 bytes | 5 cycles | ||||
| Absolute | AC | 3 bytes | 5 cycles | ||||
| Implied (type 1) | 3D | 1 byte | 2 cycles | ||||
| Implied (type 1) | FC | 1 byte | 2 cycles | ||||
| Flags Affected | |||||||
|---|---|---|---|---|---|---|---|
| N | V | P | B | H | I | Z | C |
| N | . | . | . | . | . | Z | . |
INC is an SPC700 instruction that increments its operand by one.
Syntax
INC A INC dp INC dp+X INC !abs INC X INC Y
The above are official, but some people prefer alternate mnemonics like:
INA INX INY
See Also
External Links
- Official Super Nintendo development manual on INC: Appendix C-7 of Book I
- anomie: https://github.com/yupferris/TasmShiz/blob/master/spc700.txt#L445