#include <sys/io.h>

int main ()
{
	unsigned long base = 0x378;
	unsigned long data = base;
	unsigned long dcr = base + 0x002;
	unsigned long ecr = base + 0x402;
	iopl (3);

	/* Switch to mode 001 */
	outb (0x34, ecr);
	printf ("ECR: %02x\n", inb (ecr));

	/* Turn on data drivers */
	outb (inb (dcr) & ~0x20, dcr);

	printf ("DCR: %02x\n", inb (dcr));
	outb (0x55, data);
	printf ("DATA: %02x\n", inb (data));
	outb (0xaa, data);
	printf ("DATA: %02x\n", inb (data));

	/* Turn off data drivers */
	outb (inb (dcr) | 0x20, dcr);

	printf ("DCR: %02x\n", inb (dcr));
	outb (0x55, data);
	printf ("DATA: %02x\n", inb (data));
	outb (0xaa, data);
	printf ("DATA: %02x\n", inb (data));
}