Zilog Z08470 - Manual (Page 157)

UM008007-0715 Z80 Instruction Description
Z80 CPU
User Manual
145
ADD A, n
Operation
A ← A + n
Op Code
ADD
Operands
A, n
Description
The n integer is added to the contents of the Accumulator, and the results are stored in the
Accumulator.
Condition Bits Affected
S is set if result is negative; otherwise, it is reset.
Z is set if result is 0; otherwise, it is reset.
H is set if carry from bit 3; otherwise, it is reset.
P/V is set if overflow; otherwise, it is reset.
N is reset.
C is set if carry from bit 7; otherwise, it is reset.
Example
If the Accumulator contains 23h , then upon the execution of an ADD A, 33h instruction,
the Accumulator contains 56h .
M Cycles T States 4 MHz E.T.
2 7 (4, 3) 1.75
n
1 1 0 1 0 1 0 0 C6