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Table 10-2. Read-Modify-Write Instructions
Addressing Modes
Indexed
Indexed
Inherent (A)
Inherent (X)
Direct
(No Offset)
(S-Bit Offset)
Op
#
#
Op
#
#
Op
#
#
Op
#
#
Op
#
#
Function'
Mnemonic
Code Bytes Cycles Code Bytes Cycles Code Bytes Cycles Code Bytes Cycles Code Bytes Cycles
Increment
INC
4C
1
4
5C
1
4
3C
2
6
7C
1
6
6C
2
7
Decrement
DEC
4A
1
4
5A
1
4
3A
2
6
7A
1
6
6A
2
7
Clear
CLR
4F
1
4
5F
1
4
3F
2
6
7F
1
6
6F
2
7
Complement
COM
43
1
4
53
1
4
33
2
6
73
1
6
63
2
7
Negate
(2'8
Complement)
NEG
40
1
4
50
1
4
30
2
6
70
1
6
60
2
7
Rotate Left Thru Carry
ROL
49
1
4
59
1
4
39
2
6
79
1
6
69
2
7
Rotate Right Thru Carry
ROR
46
1
4
56
1
4
36
2
6
76
1
6
66
2
7
Logical Shift Left
LSL
48
1
4
58
1
4
38
2
6
78
1
6
68
2
7
Logical Shift Right
LSR
44
1
4
54
1
4
34
2
6
74
1
6
64
2
7
Arithmetic Shift Right
ASR
47
1
4
57
1
4
37
2
6
77
1
6
67
2
7
Test for Negative or Zero
TST
40
1
4
50
1
4
3D
2
6
70
1
6
60
2
7
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