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STX
Operation:
(X
H
Description:
Stores the content of index register X in memory. The most significant
byte of X is stored at the specified address, and the least significant byte
of X is stored at the next higher byte address (the specified address plus
one).
Condition Codes and Boolean Formulas:
S
–
N:
Z:
V:
Addressing Modes, Machine Code, and Execution Times:
Source Form
STX opr8a
STX opr16a
STX oprx0_xysp
STX oprx9,xysp
STX oprx16,xysp
STX [D ,xysp ]
STX [ oprx16,xysp ]
CPU12
REFERENCE MANUAL
Store Index Register X
) ⇒ M : M + 1
: X
L
X
H
I
N
Z
∆
∆
–
–
–
Set if MSB of result is set; cleared otherwise.
Set if result is $0000; cleared otherwise.
0; Cleared.
Address Mode
DIR
EXT
IDX
IDX1
IDX2
[D,IDX]
[IDX2]
INSTRUCTION GLOSSARY
V
C
0
–
Object Code
5E dd
7E hh ll
6E xb
6E xb ff
6E xb ee ff
6E xb
6E xb ee ff
STX
Cycles
Access Detail
2
PW
3
WOP
2
PW
3
PWO
3
PWP
5
PIfPW
5
PIPPW
MOTOROLA
6-191
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