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Data Shift Instructions Section 3-8
Applicable Program Areas
Operands C: Control Word
Operand Specifications
Description NASR(581) shifts D (the shift word) by the specified number of binary bits
(specified in C) to the right (from the rightmost bit to the leftmost bit). Either
zeros or the value of the rightmost bit will be placed into the specified number
of bits of the shift word starting from the rightmost bit.
Block program areas Step program areas Subroutines Interrupt tasks
OK OK OK OK
15 8 011 712
C
0
No. of bits to shift: 00 to 10 Hex
Always 0.
Data shifted into register
0 Hex: 0 shifted in
8 Hex: Contents of rightmost bit shifted in
Area D C
CIO Area CIO 0 to CIO 6143
Work Area W0 to W511
Holding Bit Area H0 to H511
Auxiliary Bit Area A448 to A959 A0 to A447
A448 to A959
Timer Area T0000 to T4095
Counter Area C0000 to C4095
DM Area D0 to D32767
Indirect DM addresses
in binary
@ D0 to @ D32767
Indirect DM addresses
in BCD
*D0 to *D32767
Constants --- Specified values only
Data Registers DR0 to DR15
Index Registers ---
Indirect addressing
using Index Registers
,IR0 to ,IR15
–2048 to +2047 ,IR0 to –2048 to +2047 ,IR15
DR0 to DR15, IR0 to IR15
,IR0+(++) to ,IR15+(++)
,–(– –)IR0 to, –(– –)IR15
Los
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