3 // Write a byte to an I/O port.
5 out(WORD port, BYTE value )
10 : "a" (value), "Nd" (port)
14 // Read a byte from an I/O port.
20 __asm__ __volatile__ (
29 // Short delay. May be needed when talking to some
30 // (slow) I/O devices.
35 __asm__ __volatile__ (