294
Conversion Instructions
Section 5-20
Flags
ER:
Content of R and R+1 exceeds 99999999.
Indirectly addressed EM/DM word is non-existent.
(Content of
*
EM/
*
DM word is not BCD, or the EM/DM area boundary
has been exceeded.)
EQ:
ON when the result is zero.
5-20-5 4-TO-16 DECODER – MLPX(76)
Limitations
The rightmost two digits of Di must each be between 0 and 3.
All result words must be in the same data area.
DM 6144 to DM 6655 cannot be used for R.
Description
When the execution condition is OFF, MLPX(76) is not executed. When the
execution condition is ON, MLPX(76) converts up to four, four-bit hexadecimal
digits from S into decimal values from 0 to 15, each of which is used to indi-
cate a bit position. The bit whose number corresponds to each converted
value is then turned ON in a result word. If more than one digit is specified,
then one bit will be turned ON in each of consecutive words beginning with R.
(See examples, below.)
The following is an example of a one-digit decode operation from digit number
1 of S, i.e., here Di would be 0001.
The first digit and the number of digits to be converted are designated in Di. If
more digits are designated than remain in S (counting from the designated
first digit), the remaining digits will be taken starting back at the beginning of
S. The final word required to store the converted result (R plus the number of
digits to be converted) must be in the same data area as R, e.g., if two digits
are converted, the last word address in a data area cannot be designated; if
three digits are converted, the last two words in a data area cannot be desig-
nated.
S
:
Source word
IR, SR, AR, DM, EM, HR, TIM/CNT, LR
Di
:
Digit designator
IR, SR, AR, DM, EM, HR, TIM/CNT, LR, #
Ladder Symbols
Operand Data Areas
R
:
First result word
IR, SR, AR, DM, EM, HR, LR
MLPX(76)
S
Di
R
@MLPX(76)
S
Di
R
Source word
First result word
C
0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0
Bit C (i.e., bit number 12) turned ON.
