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STD
(A : B) ⇒ M : M + 1
Operation:
Stores the content of double accumulator D in memory location M : M +
Description:
1. The content of D is unchanged.
Condition Codes and Boolean Formulas:
S
–
N:
Z:
V:
Addressing Modes, Machine Code, and Execution Times:
Source Form
STD opr8a
STD opr16a
STD oprx0_xysp
STD oprx9,xysp
STD oprx16,xysp
STD [D ,xysp ]
STD [ oprx16,xysp ]
MOTOROLA
6-188
Store Double Accumulator
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
5C dd
7C hh ll
6C xb
6C xb ff
6C xb ee ff
6C xb
6C xb ee ff
STD
Cycles
Access Detail
2
PW
3
WOP
2
PW
3
PWO
3
PWP
5
PIfPW
5
PIPPW
CPU12
REFERENCE MANUAL
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