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
25
ASL
Accumulator Shift Left
7 6 5 4 3 2 1 0
C
0
Available Instruction
& No. Cycles
Addressing
mode
Assembly
Language
Form
6502
Opcode
Sunplus
Opcode
No.
Bytes
65b02
65n02
65r02 65s02
CPU12
Accumulator ASL
A
0AH
C0H
1
2
2
X
X
X
Zero Page
ASL aa
06H
81H
2
5
5
X
X
X
Zero Page, X
ASL aa, X
16H
89H
2
6
6
X
X
X
Absolute ASL
aaaa 0EH C1H 3 6
6
X X
X
Absolute, X
ASL aaaa, X
1EH
C9H
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 is 1 .