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DAA (SPC700): Difference between revisions

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!colspan="8"|Flags Clobbered
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|N
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Revision as of 02:09, 26 November 2023

Basic Info
Addressing Mode Opcode Length Speed
Accumulator DF 1 byte 3 cycles
Flags Affected
N V P B H I Z C
. . . . .

DAA (Decimal Adjust for Addition) is an SPC700 instruction that performs the following:

  1. If either the carry flag is set or the accumulator exceeds 0x99, 0x60 is added to the accumulator and the carry flag is set.
  2. Then, if either the half-carry flag is set, or the lower nibble of the accumulator exceeds 0x09, 0x06 is added to the accumulator.

See Also

External Links