Publication 1766-RM001A-EN-P - October 2008
ASCII Instructions
365
Addressing String Files
The addressing scheme for the string data file is shown below.
String Data File Structure
String Element
Bit
15
14
13
12
11
10
09
08
07
06
05
04
03
02
01
00
Word
upper byte
lower byte
0
String Length - number of characters (range is from 0…82)
1
character 0
character 1
2
character 2
character 3
↓
↓
↓
40
character 78
character 79
41
character 80
character 81
Table 2:
Format
Explanation
ST
String file
STf:e.s
f
File number
The valid file number range is from 3…255.
:
Element delimiter
e
Element number
The valid element number range is from 0…255.
Each element is 42 words in length as shown in .
.
Subelement delimiter
s
Subelement number
The valid subelement number range is from 0…41.
You can also specify .LEN for word 0 and .DATA[0] through .DATA[40] for words 1…41.
The subelement represents a word address.
Examples: ST9:2
ST17:1.LEN
ST13:7.DATA[1]
String File 9, Element 2
String File 17, Element 1, LEN Variable
String File 13, Element 7, word 2 (characters 2 and 3)
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