We've just updated MediaWiki and its underlying software. If anything doesn't look or work quite right, please mention it to us. --RanAS

DEC: Difference between revisions

From SnesLab
Jump to: navigation, search
(added Labiak page)
(added MCS6500 page)
Line 63: Line 63:
* [[Eyes & Lichty]] page on DEC: https://archive.org/details/0893037893ProgrammingThe65816/page/n477
* [[Eyes & Lichty]] page on DEC: https://archive.org/details/0893037893ProgrammingThe65816/page/n477
* [[Labiak]] page on DEC: https://archive.org/details/Programming_the_65816/page/n148
* [[Labiak]] page on DEC: https://archive.org/details/Programming_the_65816/page/n148
* [[MCS6500 Manual]] page on DEC: https://archive.org/details/mos_microcomputers_programming_manual/page/n176


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

Revision as of 04:06, 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