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DAA (SPC700): Difference between revisions

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Revision as of 13:55, 30 July 2024

Basic Info
Addressing Mode Opcode Length Speed
Accumulator DF 1 byte 3 cycles
Flags Affected
N V P B H I Z C
N . . . . . 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, add 0x60 to the accumulator and set the carry flag.
  2. Then, if either the half-carry flag is set, or the lower nibble of the accumulator exceeds 0x09, add 0x06 to the accumulator.

Syntax

DAA
DAA A

See Also

External Links