Installation manual

Publication 1747-RM001G-EN-P - November 2008
7-22 Application Specific Instructions
The FBC and DDT instructions detect mismatches and record their locations by bit number in a result file.
(1) The DDT instruction changes the status of the corresponding bit in the reference file to match the input file
when it detects a mismatch.
(2) The length of the result file is the length that you enter for RESULT CONTROL.
1111 1111 00001000
1011
0011 0011
0011
1111 0001 1111
0001
15 07 0008
1111 1111
1111 1111
0011
00000000
0011 0011
0011
0000
0000
15 08 07 00
9
0
3
2
1
31
3
32
40
bit 31
bit 40 bit 32
bit 3
Result File
(2)
(mismatched bit #s)
#N7:0
Reference File
(1)
#B3:10
Source
File #B3:0
Table 7.9 FBC and DDT Explanation
This Parameter Tells the Processor
Source (B3:0) Where to find input data for comparison.
Reference
(B3:10)
Where to find the reference file.
Results (N7:0) Where to store mismatched bit numbers.
Compare Control
(R6:0)
What control structure controls the comparison.
Length (48) The number of bits to be compared (2048 max).
Position (0) To start at the beginning of the file.
Result Control
(R6:1)
What control structure controls the result.
Length (10) The number of words reserved for mismatches (256 max).
Position (0) To start at the beginning of the file.