#include <P18F458.h>
near unsigned char mydata[100];	  
void main(void)
  { 
    unsigned char x, z = 0;
    TRISB = 0;				  
    for(x=0;x<100;x++)
      {
        z--;        			  
        mydata[x] = z;			  
        PORTB = z;   			  
      }
  }