501
Conversion Instructions Section 3-12
R: Result Word
The locations of the bits that were ON in the source word(s) are written to the
digits/bytes in R starting with the specified first digit/byte.
C: Control Word
The control word specifies whether DMPX(077) will perform a 16-to-4 bit con-
version or an 256-to-8 bit conversion, whether the leftmost or rightmost ON bit
will be encoded, the number of digits or bytes that will be converted, and the
starting digit or byte where the results will be written.
Operand Specifications
3 2 1 0
Conversion process
0: 16-to-4 bits (word to digit)
1: 256-to-8 bits
Bit to encode
0: Leftmost bit (highest bit address)
1: Rightmost bit (lowest bit address)
Number of digits/bytes to be converted
16-to-4: 0 to 3 (1 to 4 digits)
256-to-8: 0 or 1 (1 or 2 bytes)
Specifies the first digit/byte to receive converted data.
16-to-4: 0 to 3 (digit 0 to 3)
256-to-8: 0 or 1 (byte 0 or 1)
Digit number:
Area S R C
CIO Area CIO 0000 to CIO 6143
Work Area W000 to W511
Holding Bit Area H000 to H511
Auxiliary Bit Area A000 to A959 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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