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CHAPTER 6 DETAILED RULES FOR EXECUTION INSTRUCTIONS
6.3 ADDCW (ADD Word Data of Accumulator and Temporary
Accumulator with Carry to Accumulator)
Add the word data of T to that of A, add a carry to the LSB and then return the results to
A.
■ ADDCW (ADD Word Data of Accumulator and Temporary Accumulator with Carry to
Accumulator)
Operation
(A) ← (A) + (T) + (C) (Word addition with carry)
Assembler format
ADDCW A
Condition code (CCR)
+: Changed by executing instruction
-: Not changed
N: Set to 1 if the MSB of A is 1 as the result of operation and set to 0 in other cases.
Z: Set to 1 if the result of operation is 0000
H
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.
Number of execution cycle: 1
Byte count: 1
OP code: 23
NZVC
++++