/* Blinking LED*/

#include <stdio.h> /* not used */

int main(void);
void delay(void);

#define  IOREGS_BASE    0x1000
#define  _IO(offset)    *(unsigned char  volatile *)(IOREGS_BASE + offset)
#define  PORTB      _IO(0x04)      /* i/o port B */

int main(void)
{

	/* Loop to repeatedly turn the LED ON and then turn the LED OFF */
	while(1)
	{
	PORTB |= 0x80;
        delay();
	PORTB &= 0x7F;
	delay();
	}
        
         return 0; /* not used */
}

void delay()
{
	unsigned short int i=0;
        unsigned short int end=0xffff;

        for(i=0;i<end;i++); /* do nothing but wasting time */ 
}