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Data Shift Instructions Section 3-8
Description NSFR(579) shifts the specified number of bits by the shift data length (N) from
the beginning bit (C) in the rightmost word as designated by D one bit to the
right (towards the rightmost word and the rightmost bit). “0” will be placed into
the beginning bit and the contents of the rightmost bit in the shift area will be
shifted to the Carry Flag (CY).
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 0.00 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 leftmost bit
to the rightmost bit). “0” is shifted into bit 12 of CIO 1000. The contents of the
rightmost bit in the shift area (bit 2 of CIO 1000) are copied into the Carry Flag
(CY).
Shifts one bit to the right
N-1 bit
N-1 bit
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
0.00
1000
D: CIO 1000
D: CIO 1000
C: Starting from bit 2
N: 11 bits
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