sckbdevent
(void *)&sc->keyboard, sckbdevent, sc);
static kbd_callback_func_t sckbdevent;
idx0 = kbd_allocate("kbdmux", -1, (void *)&sc->keyboard, sckbdevent, sc);
idx0 = kbd_allocate("*", unit, (void *)&sc->keyboard, sckbdevent, sc);