Zilog Z08470 - Manual (Page 232)

Z80 Instruction Set UM008007-0715
220
Z80 CPU
User Manual
r identifies registers B, C, D, E, H, L, or A assembled as follows in the object code field:
Description
The contents of the m operand are rotated left 1 bit position. The contents of bit 7 are cop-
ied to the Carry flag, and the previous contents of the Carry flag are copied to bit 0.
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 reset.
P/V is set if parity even; otherwise, it is reset.
N is reset.
C is data from bit 7 of source register.
Example
The D Register and the Carry flag contain the following data.
Register r
B
000
C
001
D
010
E
011
H
100
L
101
A
111
Instruction M Cycles T States 4 MHz E.T.
RL r 2 8 (4, 4) 2.00
RL (HL) 4 15(4, 4, 4, 3) 3.75
RL (IX+d) 6 23 (4, 4, 3, 5, 4, 3) 5.75
RL (IY+d) 6 23 (4, 4, 3, 5, 4, 3) 5.75
1 0 0 1 1 1 0 1
7 6 4 1 0 2 5 3 C
0