ProSoft Technology MVI56-BAS - Manual (Page 147)

MVI56-BAS ♦ ControlLogix Platform BASIC CALLs Syntax
BASIC Module (DB/BAS Compatible) User Manual
ProSoft Technology, Inc. Page 147 of 234
December 13, 2011
9.5 String CALLs
This section describes the string manipulation commands. Remember that before
using any command listed in this section you will have to allocate memory space
for strings using the STRING command which is defined below.
Before referencing strings or using any string commands you must initially
allocate memory space for string usage. The
STRING
command should be used in
order to allocate memory space for strings:
STRING [A],[B]
Where:
A = total number of bytes to be allocated
B = maximum number of bytes to be allocated for each string
The MVI56-BAS requires an extra byte for each string and an additional
overhead byte. So, "10 STRING 100, 10" would allocate enough space for 9
strings (11 bytes each plus one more byte is 100 bytes) with no space to spare.
CALL 60: Repeating a Character
In order to repeat a character in a string use CALL 60:
PUSH [A]
PUSH [B]
CALL 60
Where:
A = number of times
B = string number that contains one character
Example:
Ready
>list
10 STRING 200, 40
20 $ ( 1) = "*"
30 PUSH 40, 1: CALL 60
40 PRINT $ ( 1)
50 END
Ready
>run
****************************************
Ready
>