X9521

FN8207 Rev 2.00

Page 23 of 24

September 21, 2010

APPENDIX 2

DCP1 (100 Tap) tap position to Data Byte translation algorithm example. (Example 2)

unsigned DCP100_TAP_Position(int tap_pos)

{

/* optional range checking

*/ if (tap_pos < 0) return ((unsigned)0);

/* set to min val */

else if (tap_pos >99) return ((unsigned) 96);

/* set to max val */

/* 100 Tap DCP encoding formula */

if (tap_pos > 74)

return ((unsigned) (195 - tap_pos));

else if (tap_pos > 49)

return ((unsigned) (14 + tap_pos));

else if (tap_pos > 24)

return ((unsigned) (81 - tap_pos));

else return (tap_pos);

}