TIMER_DIV
isa_outb(IO_TIMER1 + TIMER_CNTR2, TIMER_DIV(pitch) % 256);
isa_outb(IO_TIMER1 + TIMER_CNTR2, TIMER_DIV(pitch) / 256);
TIMER_DIV(hz) % 256);
TIMER_DIV(hz) / 256);
isa_outb(IO_TIMER1 + TIMER_CNTR2, TIMER_DIV(pitch) % 256);
isa_outb(IO_TIMER1 + TIMER_CNTR2, TIMER_DIV(pitch) / 256);
TIMER_DIV(pitch) % 256);
TIMER_DIV(pitch) / 256);