Inc r – Zilog Z08470 User Manual
Page 175
UM008007-0715
Z80 Instruction Description
Z80 CPU
User Manual
163
INC r
Operation
r ← r + 1
Op Code
INC
Operand
r
Description
Register r is incremented and register r identifies any of the registers A, B, C, D, E, H, or
L, assembled as follows in the object code.
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 r was
7Fh
before operation; otherwise, it is reset.
Register
r
A
111
B
000
C
001
D
010
E
011
H
100
L
101
M Cycles
T States
4 MHz E.T.
1
4
1.00
0
0
r
0
0
1