ADD A,
Function: Addition.
Description: The ADD instruction can be used to complete the addition of the source operand indicated by src-byte and the current value of accumulator A. The result is placed in accumulator A. According to the operation result, if there is a carry in the 7th bit, the carry flag is set to 1, otherwise it is cleared; if there is a carry in the 3rd bit, the auxiliary carry flag is set to 1, otherwise it is cleared. If it is an unsigned integer addition, the carry bit is set to indicate that the current operation result has overflowed.
Example: Assume that the data in accumulator A is 0C3H (11000011B), and the value of R0 is 0AAH (10101010B).
Execute the following instruction:
ADD
the result in accumulator A in R0 is 6DH (01101101B), the auxiliary carry flag AC is cleared, and the carry flag C and overflow flag OV are set.
ADD A, Rn
ADD A, direct
ADD A, @Ri
ADD A, #data
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