X9521

FN8207 Rev 2.00

Page 22 of 24

September 21, 2010

APPENDIX 2

DCP1 (100 Tap) tap position to Data Byte translation algorithm example. (Example 1)

unsigned DCP1_TAP_Position(int tap_pos)

{

int block;

int i;

int offset;

int wcr_val;

offset= 0;

block = tap_pos / 25;

if (block < 0) return ((unsigned)0);

else if (block <= 3)

{

switch(block)

{

case (0): return ((unsigned)tap_pos) ;

case (1):

{

wcr_val = 56;

offset = tap_pos - 25;

for (i=0; i<= offset; i++) wcr_val-- ;

return ((unsigned)++wcr_val);

}

case (2):

{

wcr_val = 64;

offset = tap_pos - 50;

for (i=0; i<= offset; i++) wcr_val++ ;

return ((unsigned)--wcr_val);

}

case (3):

{

wcr_val = 120;

offset = tap_pos - 75;

for (i=0; i<= offset; i++) wcr_val-- ;

return ((unsigned)++wcr_val);

}

}

}

return((unsigned)01100000);

}