os/io.c
2024-05-23 20:59:18 +03:00

21 lines
349 B
C

#include "io.h"
void outb(uint16_t port, uint8_t val)
{
asm volatile("outb %0, %1" : : "a"(val), "Nd"(port));
}
uint8_t inb(uint16_t port)
{
uint8_t ret;
asm volatile("inb %1, %0" : "=a"(ret) : "Nd"(port));
return ret;
}
void io_wait(void)
{
asm volatile("jmp 1f\n\t"
"1:jmp 2f\n\t"
"2:");
}