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DEC: Difference between revisions

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* [[MCS6500 Manual]] page on DEC: https://archive.org/details/mos_microcomputers_programming_manual/page/n176
* [[MCS6500 Manual]] page on DEC: https://archive.org/details/mos_microcomputers_programming_manual/page/n176
* [[Carr]] page on DEC: https://archive.org/details/6502UsersManual/page/n270
* [[Carr]] page on DEC: https://archive.org/details/6502UsersManual/page/n270
* [[Leventhal]] page on DEC: https://archive.org/details/6502-assembly-language-programming/page/n109


[[Category:ASM]]
[[Category:ASM]]

Revision as of 09:12, 16 May 2023

DEC (Decrement) is a 65x instruction that decrements the value in the location specified by the operand.

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 X DE 3 bytes 7 cycles
direct page indexed X D6 2 bytes 6 cycles
Flags Clobbered
N V M X D I Z C
. . . . . .

See Also

External Links