Routix/src/io.c

   1 /* io.c */
   2
   3 #include "routix/system.h"
   4
   5
   6 unsigned char inportb(word puerto )
   7 {
   8 unsigned char valor;
   9
  10         __asm__ __volatile__("inb %w1,%b0" : "=a" (valor) : "d" (puerto) );
  11 return valor;
  12 }
  13
  14 void outportb (word puerto, unsigned char dato)
  15 {
  16         __asm__ __volatile__("outb %b0,%w1" : : "a" (dato), "d" (puerto) );
  17 }
  18
  19
  20
  21 unsigned char inportb_p(word puerto )
  22 {
  23         unsigned char valor;
  24
  25         __asm__ __volatile__("inb %w1,%b0\n\tnop" : "=a" (valor) : "d" (puerto) );
  26         return valor;
  27 }
  28
  29 void outportb_p (word puerto, unsigned char dato)
  30 {
  31         __asm__ __volatile__("outb %b0,%w1\n\tnop" : : "a" (dato), "d" (puerto) );
  32 }