#use rs232(baud=9600,xmit=pin_c6,rcv=pin_c7,stream=HOSTPC) 
   
  #use rs232(baud=1200,xmit=pin_b1,rcv=pin_b0,stream=GPS) 
   
  #use rs232(baud=9600,xmit=pin_b3,stream=DEBUG) 
   
  ... 
   
  while(TRUE) { 
   
     c=fgetc(GPS); 
   
     fputc(c,HOSTPC); 
   
     if(c==13) 
   
       fprintf(DEBUG,"Got a CR\r\n"); 
   
  }

#if defined(__PCM__) 
  #include <16F628.h> 
  #use delay(clock=4000000) 
  void main() 
  { 
  char i=0; 
  output_a(0); 
  kontrol: 
  if(input(PIN_B0)==1) 
  { 
     i=i+1; 
     if(i=='5') 
     { 
        i=1; 
        goto motor; 
     } 
     else 
     { 
        goto motor; 
     } 
  } 
  if(input(PIN_B1)==1) 
  { 
     if(i=='0') 
     { 
        i=4; 
        goto motor; 
     } 
     else 
     { 
        i=i-1; 
        goto motor; 
     } 
  } 
  else 
  { 
     goto motor; 
  } 
  motor: 
     switch(i) 
     { 
        case 0:output_a(0); 
                      goto kontrol; 
        case 1:output_a(1); 
        delay_ms(250);goto kontrol; 
        case 2:output_a(2); 
        delay_ms(250);goto kontrol; 
        case 3:output_a(4); 
        delay_ms(250);goto kontrol; 
        case 4:output_a(8); 
        delay_ms(250);goto kontrol; 
     } 
  goto kontrol; 
  }