A 6502 instruction that clears the D (decimal mode) flag. Use this before an ADC or SBC 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

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