static inline uint8_t inb(uint16_t port)
{
    uint8_t ret;
    asm volatile ( "inb %1, %0"
                   : "=a"(ret)
                   : "Nd"(port) );
    return ret;
}
unsigned char kbdus[128] =
{
0,0,'1','2','3','4','5','6','7','8','9','0','-','=','\b','\t','q','w','e','r','t','y','u','i','o','p','[',']','\n',0,'a','s','d','f','g','h','j','k','l',';','\'','`',0,'\\','z','x','c','v','b','n','m',',','.','/',0,'*',0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
};
void keyboard_handler(struct regs *r)
{
    unsigned char scancode;
    scancode = inb(0x60);
    if (scancode & 0x80)
    {

    }
    else
    {
        if (terminal)
			terminal_putchar(kbdus[scancode]);
    }
    cmdchar(kbdus[scancode]);
}