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T1/T1S User’s Manual
7. Instructions
FUN 075
DSR
Bi-directional shift register
Expression
Data input
-
D
DSR
Q
-
Output
Shift input
-
S
(
n
)
Enable input
-
E
Direction input
-
L
A
Function
While the enable input (E) is ON, this instruction shifts the data of the bit table, size
n starting with A,
1 bit when the shift input (S) is ON. The shift direction is determined by the state of the direction input
(L).
When L is OFF, the direction is right (lower address direction).
When L is ON, the direction is left (upper address direction).
The state of the data input (D) is stored in the highest bit if right shift, and stored in the lowest bit
A if left
shift. The pushed out bit state is stored in the carry flag (CF = S050).
When the enable input (E) is OFF, all bits in the table and the carry flag are reset to OFF.
Execution condition
Enable
input
Operation
Output
CF
OFF
Resets all bits in the bit table
OFF
Reset
ON
S = ON
L = ON
Shift left execution
Highest bit state
Set or reset
L = OFF
Shift right execution
Lowest bit state
Set or reset
S = OFF
No execution
Highest bit state
-
Operand
Name
Device
Register
Constant Index
X
Y
R
S
T.
C. XW YW RW SW
T
C
D
I
J
K
A
Leading device
Ö
Ö
Ö
n
Device size
1 - 64
Example
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