Automationdirect.com DL05, User Manual

Page: 270 / 480

Standard
RLL
Instructions
5–86
Standard RLL Instructions
Number Conversion Instructions
Direct SOFT Display
Handheld Programmer Keystrokes
LD
K4
X1 Load the constant value
into the lower 16 bits of the
accumulator. This value
defines the number of V
memory location in the
ASCII table
LDA
O 1400
Convert octal 1400 to HEX
300 and load the value into
the accumulator
ATH
V1600
V1600 is the starting
location for the HEX table
ASCII TABLE
Hexadecimal
Equivalents
1234
33 34
V1400
5678
31 32
V1401
37 38
V1402
35 36
V1403
V1600
V1601
STR
$
SHFT
ANDST
L
3
D
SHFT
JMP
K
4
E
ENT
SHFT
ANDST
L
3
D
0
A
0
A
0
A
ENT
SHFT
1
B
ENT
0
A
0
A
ENT
1
B
4
E
0
A
MLR
T
7
H
1
B
6
G
aaa V
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.
HEX to ASCII
(HTA)