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MICROPROCESSOR INSTRUCTION REFERENCE->ADD

ADD        Add A,<source byte>

Add the source byte to the accumulator and store the result in the accumulator.

Formats:
    

Description	Mnemonic	Bytes	Cycles

Add Immediate Data:	ADD A,#<data>	2	1
Add Indirect Address:	ADD A,@Ri	1	1
Add Register:	ADD A,Rn	1	1
Add Memory:	ADD A,<direct address>	2	1

where Ri is R0 or R1 and Rn is R0 - R7
    

PSW:	C	AC	F0	RS1	RS0	OV	P
	*	*	N/A	N/A	N/A	*	*

(N/A: Not affected)

Carry (C) is set if there is a carry out of bit 7, else it is cleared.
Auxiliary carry (AC) is set if there is a carry from bit 3, else it is cleared.
Overflow (OV) is set if there is a carry out of bit 6 but not out of bit 7 or a carry out of bit 7 but not out of bit 6, else it is cleared.