ELCR_PORT
outb(ELCR_PORT + 1, elcr_status >> 8);
outb(ELCR_PORT, elcr_status & 0xff);
outb(ELCR_PORT, elcr_status & 0xff);
outb(ELCR_PORT + 1, elcr_status >> 8);
elcr_status = inb(ELCR_PORT) | inb(ELCR_PORT + 1) << 8;
SYSRES_IO(ELCR_PORT, 2);