643
Data Control Instructions Section 3-17
If the input data (S) is greater than zero, the input data plus the positive bias
will be output to D and the Greater Than Flag will turn ON.
If the input data (S) is equal to zero, 0000 will be output to D and the Equals
Flag will turn ON.
If the output data is smaller than the 8000 (hex) or if is greater than 7FFF, the
sign will be reversed. For example, for a negative bias value of FF00 (hex) and
input data of 8000 (hex), the output data will be as follows:
8000 (hex) [–32768] – FF00 (hex) [–256] = 7F00 (hex) [32512]
Flags
Precautions If the upper limit is less than the lower limit, an error will occur and the Error
Flag will turn ON.
If the input data (S) is greater than the upper limit, the Greater Than Flag will
turn ON.
If the output word D is 0000 hex, the Equals Flag will turn ON.
If the input data (S) is less than the lower limit, the Less Than Flag will turn
ON.
If the status of the leftmost bit of the output word D is “1,” the Negative Flag
will turn ON.
Example When CIO 0.00 is ON, a bias of –100 will be applied to the value of D100 if
that value is less than 0, and the resulting value will be stored in D300.
If the value of D100 is 0, then 0000 hex will be stored in D300.
If the value of D100 is greater than 0, then a bias of +100 will be applied and
the resulting value will be stored in D300.
Input
Negative bias (C)
Positive bias (C+1)
Output
Name Label Operation
Error Flag ER ON if the upper limit is less than the lower limit.
OFF in all other cases.
Greater Than
Flag
> ON if the input data (S) is greater than the upper limit.
OFF in all other cases.
Equals Flag = ON if the result is 0.
OFF in all other cases.
Less Than Flag < ON if the input data (S) is less than the lower limit.
OFF in all other cases.
Negative Flag N ON if the leftmost bit of the result is “1.”
OFF in all other cases.
To Next Page
Loading...
