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INC (SPC700): Difference between revisions

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|[[Direct Page Addressing | Direct Page]]
|[[Direct Page Addressing | Direct Page]]
|AB
|AB
|2 byte
|2 bytes
|4 cycles
|4 cycles
|+
|+
|[[Direct Page Indexed by X]]
|[[Direct Page Indexed by X]]
|BB
|BB
|2 byte
|2 bytes
|5 cycles
|5 cycles
|+
|+
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|[[Carry Flag|C]]
|[[Carry Flag|C]]
|+
|+
|
|N
|.
|.
|.
|.
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|Z
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'''INC''' is an [[SPC700]] instruction that increments the operand by one.
'''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