eZ80
®
CPU
User Manual
UM007714-0908 CPU Instruction Set
92
ADD A, r
ADD without Carry
Operation
A ← A+r
Description
The
r
operand is any of the 8-bit CPU registers A, B, C, D, E, H, or L. The
r
operand is
added to the contents of the accumulator, A. The result is stored in the accumulator.
Condition Bits Affected
Attributes
jj identifies the A, B, C, D, E, H, or L register and is assembled into one of the opcodes in
Table 40.
S Set if result is negative; reset otherwise.
Z Set if result is 0; reset otherwise.
H Set if carry from bit 3; reset otherwise.
P/V Set if overflow; reset otherwise.
N Reset.
C Set if carry from bit 7; reset otherwise.
Mnemonic Operand ADL Mode Cycle Opcode (hex)
ADD A,r X1jj
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