TIMER_SEL0
outb(IO_TIMER1+TIMER_MODE, TIMER_SEL0 | TIMER_LATCH);
outb(IO_TIMER1 + TIMER_MODE, TIMER_SEL0 | TIMER_RATEGEN | TIMER_16BIT);
outb(IO_TIMER1+TIMER_MODE, TIMER_SEL0 | TIMER_LATCH);
outb(IO_TIMER1 + TIMER_MODE, TIMER_SEL0 | TIMER_LATCH);
outb(IO_TIMER1 + TIMER_MODE, TIMER_SEL0 | TIMER_RATEGEN | TIMER_16BIT);
outb(IO_TIMER1 + TIMER_MODE, TIMER_SEL0 | TIMER_LATCH);
outb(IO_TIMER1 + TIMER_MODE, TIMER_SEL0);
(TIMER_SEL0 | TIMER_SEL1 | TIMER_SEL2);