555 B
555 B
| title | summary |
|---|---|
| pit.h | communicates with the _Programmable Interval Timer_ |
PIT_CHANNEL_0_PORT - macro
The IO port, where channel 0 of the PIT (which is capable of firing IRQs) can be configured.
PIT_DIVISOR - macro
The standard divisor, that noxos loads into channel 0 of the PIT.
32768 fires an interrupt every ~27ms, what is perfect for preemptive multithreading.
pit_set_divisor(divisor) - function (void)
Loads divisor into channel 0 of the PIT. If divisor is smaller than 100, it will be set to 100.