K_STATUS
(inb(K_STATUS) == 0xff && inb(K_RDWR) == 0xff)) {
while (inb(K_STATUS) & K_IBUF_FUL);
while (inb(K_STATUS) & K_OBUF_FUL)
while (inb(K_STATUS) & K_IBUF_FUL);
while (inb(K_STATUS) & K_IBUF_FUL);
while (inb(K_STATUS) & K_OBUF_FUL)