int status_temp;
int w_temp;
int cpt;
void interrupt() {
     w_temp = W;
     status_temp = STATUS;
     if (INTCON.T0IF = 1) {
          INTCON.T0IF = 0;
          cpt-=1;
          if (cpt = 0) {
               cpt = 0X3D;// D'61'
               if (PORTB = 0X00) {
                  PORTB = 0XFF;
               }
               else if (PORTB = 0XFF) {
                  PORTB = 0X00;
               }
               goto ENDI;
          }
          else {
               goto ENDI;
          }
     }
     else {
          goto ENDI;
     }
ENDI:;
STATUS = status_temp;
//W = w_temp;
}
void initialize() {
     TRISB = 0X00;
     OPTION_REG = 0X85;
     INTCON = 0XA0;
     PORTB = 0X00;
     cpt = 0X3D;// D'61'
}
void main() {
     initialize();
     start:;
     
     goto start;
     /*while(1) {
     
     }*/
}