unsigned char B[10]={0xfc,0x60,0xda,0xf2,0x66,0xb6,0xbe,0xe0,0xfe,0xf6};
unsigned char ones,tens,temp,tempones,temptens,int_flag;
void show()
{
  portb=B[tens];
  portc=B[ones];
  delay_ms(1000);
}
 void interrupt()
{
 while(portb.f0){}         //  continue debounce
begin:
 if(porta.f0)
 {  delay_ms(250);
    while(porta.f0){
      if(ones!=9) { ones++;}
      else { if (tens==9) {tens=0xff;}  ones=0; tens++;}
       show();}
 }
 else if (porta.f1)
 {
     delay_ms(250);
   while(porta.f1){
       if(ones!=0) {ones--;}
       else{if(tens==0){tens=10;}ones=9; tens--;}
       show();
        }
 }
 else if (portb.f0)
 {     delay_ms(500);
       while (portb.f0) {}
       int_flag=1;
       tempones=ones;
       temptens=tens;
       INTCON.INTF=0;
       return;
 }
 else {goto begin;}
}

 void write()
{
       int_flag=0;
       EEprom_write(0x00,tempones);
       delay_ms(25);
       EEprom_write(0x01,temptens);
       delay_ms(25);
}
void flasher()
{
 porta.f2=0;
 
 porta.f3=1;delay_ms(1000);
 porta.f3=0;delay_ms(1000);
 porta.f3=1;delay_ms(1000);
 porta.f3=0;delay_ms(1000);
 porta.f3=1;delay_ms(1000);
 porta.f3=0;delay_ms(1000);
 porta.f3=1;delay_ms(1000);
 porta.f3=0;delay_ms(1000);
}
void main()
{
intcon.f7=1; intcon.INTE=1;  //rb0 interrupt
adcon1=0x06;  trisa=0x03;    // porta 0,1 as switches
trisb=0x01; trisc=0;
temp=Eeprom_read(0x00);
 delay_ms(25);
if(temp==0xff){temptens=1;tempones=5;}
else {tempones=temp;temp=Eeprom_read(0x01); delay_ms(25); temptens=temp;}
start:
 ones=tempones;
 tens=temptens;
 porta.f2=1;
 test:
 if(int_flag==1){write(); goto start;}
    show();
 if(int_flag==1){write(); goto start;}
 if(tens==0 && ones==0&&int_flag==0) {flasher(); goto start;}
 if(ones==0&&int_flag==0) {tens--;  ones=9 ;goto test;}
 ones--;
 goto test;
}