#include <unistd.h>
#include <sys/io.h>
#include <stdio.h>
#include <time.h>

#define IOBASE 0x378

char singleStates[] = { 0x8, 0x4, 0x2, 0x1, 0x8, 0x4, 0x2, 0x1 };
char doubleStates[] = { 0xC, 0x6, 0x3, 0x9, 0xC, 0x6, 0x3, 0x9 };
char halfStates[]   = { 0x8, 0xC, 0x4, 0x6, 0x2, 0x3, 0x1, 0x9 };

int main(int argc, char **argv) {
	int i;

	if(ioperm(IOBASE, 3, 1)) {
		perror("ioperm(1)");
		return -1;
	}

	while(-1) {
		for(i = 7; i > -1; i--) {
			outb(doubleStates[i], IOBASE);
			usleep(1);
			//for(j = 0; j < 1000000; j++);
		}
	}

	/* not reached */
	if(ioperm(IOBASE, 3, 0)) {
		perror("ioperm(0)");
		return -1;
	}
	return 0;
}