GMS81C5108 APPENDIX
Register / Memory Operation
Op
Code
Byte
No
Cycle
No
Flag
NVGBHIZC
No.
Mnemonic
Operation
1
LDA #imm
C4
C5
C6
C7
D5
D6
D7
D4
DB
E4
1E
CC
CD
DC
3E
C9
D9
D8
E5
E6
E7
F5
2
2
2
3
3
2
2
1
1
3
2
2
2
3
2
2
2
3
2
2
3
3
2
2
1
1
2
2
3
2
2
3
1
1
1
1
1
1
1
1
2
2
1
1
2
3
4
4
5
6
6
3
4
5
2
3
4
4
2
3
4
4
4
5
5
6
7
7
4
4
4
5
5
4
5
5
2
2
2
2
2
2
4
4
5
6
5
4
Load accumulator
2
LDA dp
A ← ( M )
3
LDA dp + X
LDA !abs
LDA !abs + Y
LDA [ dp + X ]
LDA [ dp ] + Y
LDA { X }
LDA { X }+
LDM dp,#imm
LDX #imm
LDX dp
4
5
N-----Z-
6
7
8
9
X- register auto-increment : A ← ( M ) , X ← X + 1
Load memory with immediate data : ( M ) ← imm
Load X-register
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
--------
N-----Z-
X ← ( M )
LDX dp + Y
LDX !abs
LDY #imm
LDY dp
Load Y-register
Y ← ( M )
N-----Z-
--------
LDY dp + X
LDY !abs
STA dp
Store accumulator contents in memory
STA dp + X
STA !abs
STA !abs + Y
STA [ dp + X ]
STA [ dp ] + Y
STA { X }
STA { X }+
STX dp
( M ) ← A
F6
F7
F4
FB
EC
ED
FC
E9
F9
X- register auto-increment : ( M ) ← A, X ← X + 1
Store X-register contents in memory
( M ) ← X
STX dp + Y
STX !abs
STY dp
--------
--------
Store Y-register contents in memory
STY dp + X
STY !abs
TAX
( M ) ← Y
F8
E8
9F
Transfer accumulator contents to X-register : X ← A
Transfer accumulator contents to Y-register : Y ← A
Transfer stack-pointer contents to X-register : X ← sp
Transfer X-register contents to accumulator: A ← X
Transfer X-register contents to stack-pointer: sp ← X
Transfer Y-register contents to accumulator: A ← Y
Exchange X-register contents with accumulator :X ↔ A
Exchange Y-register contents with accumulator :Y ↔ A
Exchange memory contents with accumulator
( M ) ↔ A
N-----Z-
N-----Z-
N-----Z-
N-----Z-
N-----Z-
N-----Z-
--------
--------
TAY
TSPX
AE
C8
8E
BF
EE
DE
BC
AD
BB
FE
TXA
TXSP
TYA
XAX
XAY
XMA dp
XMA dp+X
XMA {X}
XYX
N-----Z-
--------
Exchange X-register contents with Y-register : X ↔ Y
JUNE 2001 Ver 1.0
vii
HYNIX [ HYNIX SEMICONDUCTOR ]
