Delta AH500 - Page 657

Chapter 6 Applied Instructions
6-489
API Instruction code Operand
Function
2117 $DEL P
S
1
, S
2
, S
3
, D
Deleting the characters in the string
Device
X Y M S T C HC D L SM SR E PR K 16# “$” DF
S
1
       
S
2
          
S
3
          
D
      
Pulse instruction
16-bit instruction (9 steps)
32-bit instruction
AH500 AH500 -
Symbol:
S
1
：
String Word
S
2
：
Number of characters which are deleted Word
S
3
：
The characters in S
1
starting from the
character indicated by the value in S
3
are
deleted.
Word
D
：
Device in which the execution result is
stored
Word
Explanation:
1. The characters in S
1
starting from the character indicated by the value in S
3
are deleted, the
number of characters which are deleted is indicated by the value in S
2
, and the result is stored
in D.
2. The four characters starting from the third character in the string “1234567890” in S
1
are
deleted, and the result “127890” is stored in D.
b15
b0
b7 b8
0016#
S1
16#31(1) 16#32(2)
33(3)16# 34(4)16#
36(6)16#
35(5)16#
37(7)16#
38(8)16#
39(9)16#
b15
b0
b7 b8
D
+1 D
+2 D
+1
S1
+2
S1
+3
S1
+4
S1
S2
S3
+5 S1
30(0)16#
4
3
16#31(1) 32(2)16#
37(7)16# 38(8)16#
+2 D
000016#
39(9)16#
30(0)16#
Ignored
After the instruction
is executed
3. If the value in S
2
is larger than the number of characters which can be deleted in the string in
S
1
, the characters in S
1
starting from the character indicated by the value in S
3
to the last
character in S
1
are deleted, and 16#00 is stored in D.