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DEC: Difference between revisions

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(→‎See Also: DEC (Super FX))
(linkify admodes)
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|5 cycles*
|5 cycles*
|+
|+
|absolute indexed X
|[[Absolute Indexed by X]]
|DE
|DE
|3 bytes
|3 bytes
|7 cycles*
|7 cycles*
|+
|+
|direct page indexed X
|[[Direct Page Indexed by X]]
|D6
|D6
|2 bytes
|2 bytes

Revision as of 21:14, 26 June 2024

Basic Info
Addressing Mode Opcode Length Speed
Accumulator 3A 1 byte 2 cycles
Absolute CE 3 bytes 6 cycles*
Direct Page C6 2 bytes 5 cycles*
Absolute Indexed by X DE 3 bytes 7 cycles*
Direct Page Indexed by X D6 2 bytes 6 cycles*
Flags Affected
N V M X D I Z C
. . . . . .

DEC (Decrement) is a 65x instruction that decrements the value in the location specified by the operand. The size of the accumulator determines whether this is an 8 or 16 bit operation.

DEC ignores the decimal mode flag.

Cycle Penalties

See Also

External Links

Retrieved from "https://sneslab.net/mw/index.php?title=DEC&oldid=15501"