src/port.c


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#include "port.h"

uint8_t port_byte_in (uint8_t port) {
    uint8_t result;
    __asm__("in %%dx, %%al" : "=a" (result) : "d" (port));
    return result;
}

void port_byte_out(uint8_t port, uint8_t data) {
    __asm__("out %%al, %%dx" : :"a" (data), "d" (port));
}

uint16_t port_word_in (uint16_t port) {
    uint16_t result;
    __asm__("in %%dx, %%ax" : "=a" (result) : "d" (port));
    return result;
}

void port_word_out (uint16_t port, uint16_t data) {
    __asm__("out %%ax, %%dx" : :"a" (data), "d" (port));
}