sys_portio.c

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/* ports I/O functions */

#include "../fb.h"
#include "fb_private_console.h"

int fb_hIn( unsigned short port )
{
        unsigned char value;
        __asm__ volatile ("inb %1, %0" : "=a" (value) : "d" (port));
        return (int)value;
}

int fb_hOut( unsigned short port, unsigned char value )
{
        __asm__ volatile ("outb %0, %1" : : "a" (value), "d" (port));
        return FB_RTERROR_OK;
}