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Data Shift Instructions Section 3-9
Flags
Precautions When ROR(028) is executed, the Error Flag will turn OFF.
If as a result of the shift the contents of Wd is zero, the Equals Flag will turn
ON.
If as a result of the shift the contents of the leftmost bit of Wd is 1, the Nega-
tive Flag will turn ON.
Note It is possible to set the Carry Flag contents to 1 or 0 immediately before exe-
cuting this instruction, by using the Set Carry (STC(040)) or Clear Carry
(CLC(041)) instructions.
Examples When CIO 000000 is ON, word CIO 0100 and the Carry Flag (CY) will shift
one bit to the right. The contents of CIO 010000 will be shifted to the Carry
Flag (CY) and the Carry Flag contents will be shifted to CIO 010015.
3-9-12 DOUBLE ROTATE RIGHT: RORL(573)
Purpose Shifts all Wd and Wd +1 bits one bit to the right including the Carry Flag (CY).
Ladder Symbol
Variations
Wd
Name Label Operation
Error Flag ER OFF
Equals Flag = ON when the shift result is 0.
OFF in all other cases.
Carry Flag CY ON when 1 is shifted into the Carry Flag (CY).
OFF in all other cases.
Negative Flag N ON when the leftmost bit is 1 as a result of the shift.
OFF in all other cases.
Instruction executed once
Wd
Wd: CIO 0100
RORL(573)
Wd: Word
Wd
Variations Executed Each Cycle for ON Condition RORL(573)
Executed Once for Upward Differentiation @RORL(573)
Executed Once for Downward Differentiation Not supported
Immediate Refreshing Specification Not supported
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