Explanation: For addition purposes the destination address must always be an accumulator. Example- ADD A,R0; ADD A, @R1; ADD A,@ DPTR 2. DAA command adds 6 to the nibble if:
A. CY and AC are necessarily 1
B. either CY or AC is 1
C. no relation with CY or AC
D. CY is 1
Answer:A
Explanation: For addition purposes the destination address must always be an accumulator. Example- ADD A,R0; ADD A, @R1; ADD A,@ DPTR 2. DAA command adds 6 to the nibble if:
A. CY and AC are necessarily 1 B. either CY or AC is 1 C. no relation with CY or AC D. CY is 1
Explanation: DAA command adds 6 to the nibble, if any of the nibble becomes greater than 9.