102
Conversion Instructions Section 3-10
DATA ENCODER
DMPX
@DMPX
077
Output
Required
ASCII CONVERT
ASC
@ASC
086
Output
Required
Instruction
Mnemonic
Code
Symbol/Operand Function Location
Execution
condition
S: 1st source
word
R: Result word
C: Control word
DMPX(077)
S
R
C
l=1 (Convert
2 words.)
n=2 (Start with digit 2.)
16-to-4 bit decoding
(Location of left-
most bit (m) is writ-
ten to R.)
FInds leftmost bit
(Highest bit address)
C
R
Leftmost bit Rightmost bit
l=0 (Convert one 16-word range.)
n=1 (Start with byte 1.)
256-to-8 bit decoding
(The location of the leftmost bit in the
16-word range (m) is written to R.)
Finds leftmost bit
(Highest bit address)
C
R
FInds the location of the first or last ON bit within the source word (or 16-word
range), and writes that value to the specified digit (or byte) in the result word.
16-to-4 bit conversion
256-to-8 bit conversion
Leftmost bit Rightmost bit
S: Source word
Di: Digit
designator
D: 1st destination
word
ASC(086)
S
Di
D
First digit to convert
Number of
digits (n+1)
Right (0)Left (1)
Di
Converts 4-bit hexadecimal digits in the source word into their 8-bit ASCII
equivalents.
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