instruction that clears the D (decimal mode) flag. Use this before an ADC
to get binary arithmetic.
- Function: 0 => D
- Updates flags: . . . . D . . .
- Opcode number: impl $D8
This instruction works whether or not the particular 6502 model actually implements decimal mode ADC and SBC. (For instance, the 2A03 lacks it.) Because the setting of the D flag is unknown on reset, make sure to include a CLD near the beginning of your boot code.
As opposed to: SED
See also: 6502 instructions | 6502 addressing modes