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CLC
From SnesLab
CLC is a 65x instruction that clears the carry flag.
The 6502 lacks an add-without-carry instruction, so it is important to make sure the carry flag is clear before doing an ADC or else the sum will be one too great.
| Basic Info | |||||||
|---|---|---|---|---|---|---|---|
| Addressing Mode | Opcode | Length | Speed | ||||
| implied | 18 | 1 byte | 2 cycles | ||||
| Flags Clobbered | ||||||||
|---|---|---|---|---|---|---|---|---|
| N | V | M | X | D | I | Z | C | |
| . | . | . | . | . | . | . | 0 | |
See Also
External Links
- Eyes & Lichty page on CLC: https://archive.org/details/0893037893ProgrammingThe65816/page/n467
- Labiak page on CLC: https://archive.org/details/Programming_the_65816/page/n140
- MCS6500 Manual page on CLC: https://archive.org/details/mos_microcomputers_programming_manual/page/n40
- Carr page on CLC: https://archive.org/details/6502UsersManual/page/n266
- Leventhal page on CLC: https://archive.org/details/6502-assembly-language-programming/page/n101
- snes9x implementation of CLC: https://github.com/snes9xgit/snes9x/blob/master/cpuops.cpp#L1420