CHAPTER 6 DETAILED RULES FOR EXECUTION INSTRUCTIONS
6.2ADDC (ADD Byte Data of Accumulator and Memory with Carry to Accumulator)
Add the byte data of EA memory (memory expressed in each type of addressing) to that of AL, add a carry to the LSB and then return the results to AL. The contents of AH are not changed.
■ADDC (ADD Byte Data of Accumulator and Memory with Carry to Accumulator)
Operation
(AL) ← (AL) + (EA) + (C) (Byte addition with carry)
Assembler format
ADDC A, EA
Condition code (CCR)
N | Z | V | C |
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+ | + | + | + |
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+: Changed by executing instruction
N:Set to 1 if the MSB of AL is 1 as the result of operation and set to 0 in other cases.
Z:Set to 1 if the result of operation is 00H and set to 0 in other cases.
V:Set to 1 if an overflow occurs as the result of operation and set to 0 in other cases.
C:Set to 1 if a carry occurs as the result of operation and set to 0 in other cases.
Table 6.2-1 Number of Execution Cycles / Byte Count / OP Code
EA | #d8 | dir | @IX+off | @EP | Ri |
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Number of execution | 2 | 3 | 3 | 2 | 2 |
cycles |
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Byte count | 2 | 2 | 2 | 1 | 1 |
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OP code | 24 | 25 | 26 | 27 | 28 to 2F |
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50
