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398
Data Shift Instructions
Section 3-9
Flags
Precautions
When the shift data length (N) is 0, the contents of the beginning bit will be
copied to the Carry Flag (CY), and its contents will not be changed.
Only the bits shifted into rightmost word in the shift area (i.e. leftmost word
data) will be changed.
Examples
When CIO 000000 is ON, all bits from the beginning bit 2 to end of the shift
data length 11 bits (B hex), will be shifted one bit to the right, (from the left-
most bit to the rightmost bit). “0” is shifted into bit 12 of CIO 0100. The con-
tents of the rightmost bit in the shift area (bit 2 of CIO 0100) are copied into
the Carry Flag (CY).
3-9-21 SHIFT N-BITS LEFT: NASL(580)
Purpose
Shifts the specified 16 bits of word data to the left by the specified number of
bits.
Ladder Symbol
Variations
Applicable Program Areas
Name
Label
Operation
Error Flag
ER
ON when C data is not between 0000 and 000F hex.
OFF in all other cases.
Carry Flag
CY
ON when 1 is shifted into the Carry Flag (CY).
OFF in all other cases.
0
&2
&11
C: Starting from bit 2
N: 11 bits
NASL(580)
D
C
D
: Shift word
C
: Control word
Variations
Executed Each Cycle for ON Condition
NASL(580)
Executed Once for Upward Differentiation
@NASL(580)
Executed Once for Downward Differentiation
Not supported
Immediate Refreshing Specification
Not supported
Block program areas
Step program areas
Subroutines
Interrupt tasks
OK
OK
OK
OK
Содержание SYSMAC CS1D-CPU**
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Страница 185: ...146 List of Instructions by Function Code Section 2 4...
Страница 193: ...154 3 35 4 MOVE BIT MOVBC 568 1274 3 35 5 BIT COUNTER BCNTC 621 1276 3 35 6 GET VARIABLE ID GETID 286 1278...
Страница 1389: ...1350 CJ series Instruction Execution Times and Number of Steps Section 4 2...
Страница 1390: ...1351 Appendix A ASCII Code Table ASCII SP Four leftmost bits Four rightmost bits...
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