static inline void outb(unsigned short port, unsigned char val) {
    __asm__ volatile( 
        "outb %0, %1" 
        : 
        : "a"(val), 
        "Nd"(port) );
}

static inline unsigned char inb(unsigned short port) {
    unsigned char ret;
    __asm__ volatile(
        "inb %1, %0"
        : "=a"(ret)
        : "Nd"(port)
    );

    return ret;
}