#include <p18f4455.h>
#include <delays.h>
#include <timers.h>

void example_timer_isr ( void );

#pragma code low_vector=0x18
void low_interrupt ( void )
{
	_asm GOTO example_timer_isr _endasm
}

#pragma code

#pragma interruptlow example_timer_isr

void example_timer_isr ( void )
{
	INTCONbits.TMR0IF = 0;

	++PORTB;
}
void main( void )
{
	// Configure PORTB
	TRISB = 0;
	PORTB = 0;

	// Disable analog components
	ADCON1 = 0x0F;
	CMCON  = 0x07;

	// Setup and start timer
	OpenTimer0( T0_16BIT & TIMER_INT_ON & T0_SOURCE_INT & T0_PS_1_16 );

	// Enable interrupts
	INTCONbits.GIE = 1;

	// Do nothing ... the port state will be changed from the ISR
	while ( 1 );
}