398
Data Shift Instructions Section 3-9
Operands C: Control Word
Operand Specifications
Description NASL(580) shifts D (the shift word) by the specified number of binary bits
(specified in C) to the left (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.
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 0000 to CIO 6143
Work Area W000 to W511
Holding Bit Area H000 to H511
Auxiliary Bit Area A448 to A959 A000 to A959
Timer Area T0000 to T4095
Counter Area C0000 to C4095
DM Area D00000 to D32767
EM Area without bank E00000 to E32767
EM Area with bank En_00000 to En_32767
(n = 0 to C)
Indirect DM/EM
addresses in binary
@ D00000 to @ D32767
@ E00000 to @ E32767
@ En_00000 to @ En_32767
(n = 0 to C)
Indirect DM/EM
addresses in BCD
*D00000 to *D32767
*E00000 to *E32767
*En_00000 to *En_32767
(n = 0 to C)
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
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