ZiLOG Z80380 User Manual page 104

Z
ILOG
INC
INCREMENT (BYTE)
INC dst dst = R, RX, IR, X
dst ← dst + 1
Operation:
The destination operand is incremented by one and the sum is stored in the destination.
Two's complement addition is performed.
Flags: S: Set if the result is negative; cleared otherwise
Z: Set if the result is zero; cleared otherwise
H: Set if there is a carry from bit 3 of the result; cleared otherwise
V: Set if arithmetic overflow occurs, that is, if the destination was 7FH; cleared otherwise
N: Cleared
C: Unaffected
Addressing
Mode Syntax
R: INC R
RX: INC RX
IR: INC (HL)
X: INC (XY+d)
Field Encodings: r: per convention
y: 0 for IX, 1 for IY
w: 0 for high byte, 1 for low byte
2 for accumulator, 3 for any other register
Note:
5-70
Instruction Format
00-r-100
11y11101 0010w100
00110100
11y11101 00110100 ——d—
U
Execute
Time Note
note
2
2+r+w
4+r+w I
DC-8297-03
Z380 ™
' M
SER S ANUAL