DL205 User Manual, 4th Edition, Rev. D
5-138
Chapter 5: Standard RLL Instructions
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A
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C
D
HEX to ASCII (HTA)
The HEX to ASCII instruction converts a table of HEX
values to a specified table of ASCII values. HEX values are
one digit and their ASCII equivalents are two digits.
This means a HEX table of two V-memory locations would
require four V-memory locations for the equivalent ASCII table. The function parameters are
loaded into the accumulator stack and the accumulator by two additional instructions. Listed
below are the steps necessary to program a HEX to ASCII table function. The example on the
following page shows a program for the HEX to ASCII table function.
Step 1: Load the number of V-memory locations in the HEX table into the first level of the
accumulator stack.
Step 2: Load the starting V-memory location for the HEX table into the accumulator. This
parameter must be a HEX value.
Step 3: Specify the starting V-memory location (Vaaa) for the ASCII table in the HTA instruction.
Helpful hint: — For parameters that require HEX values when referencing memory locations,
the LDA instruction can be used to convert an octal address to the HEX equivalent and load
the value into the accumulator.
DirectSOFT
LD
K4
X1
Load the constant value
into the lower 16 bits of the
accumulator. This value
defines the number of V
memory locations in the
ASCII table
LDA
O 1400
Convert octal 1400 to HEX
300 and load the value into
the accumulator
AT H
V1600
V1600 is the starting
location for the HEX table
ASCII TABLE
Hexadecimal
Equivalents
1234
33 34
V1400
5678
31 32V1401
37 38
V1402
35 36
V1403
V1600
V1601
STR
$
SHFT
ANDST
L
3
D
7
H
SHFT
MLR
T
SHFT
1
B
ENT
ENT
4
E
0
A
0
A
ENT
1
B
6
G
0
A
0
A
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