S
un
pl
us
IT
C
on
fid
en
tia
l
F
or
A
D
D
In
te
rn
at
io
na
l L
im
ite
d
U
se
O
nl
y
CPU6502 Instruction Manual v2.1
Sunplus reserves the rights to change this documentation without prior notice.
09/13/2005
42
ROL
Rotate Left
Available Instruction
& No. Cycles
Addressing
mode
Assembly
Language
Form
6502
Opcode
Sunplus
Opcode
No.
Bytes
65b02 65n02
65r02 65s02
CPU12
Accumulator ROL
A
2AH
D0H
1
2
2
2
2
2
Zero Page
ROL aa
26H
91H
2
5
5
5
5
5
Zero Page, X ROL aa, X
36H
99H
2
6
6
X
X
X
Absolute ROL
aaaa
2EH
D1H
3
6
6
X
X
X
Absolute, X
ROL aaaa, X
3EH
D9H
3
6 6* X X X
* Add 1 clock cycle if page boundary is crossed.
X: Not available.
N V D I Z C
! - - - ! !
N: Set if result is negative
Z: Set if result is 0
C: Set if the bit shifted from the most significant bit position is 1.
7
6
5
4
3
2
1
0
C