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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
- 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
- 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
- Leventhal page on DEC: https://archive.org/details/6502-assembly-language-programming/page/n109