* Now not initialized until used.  This means low memory open failure
    is possible.  Check your return values from OpenDevice().  This also
    means audio.device cannot be opened during 2.0 Strap unless
    InitResident()ed first.  If OpenDevice() of audio.device fails during
    strap, you must FindResident()/InitResident() audio.device, and then
    try OpenDevice() again.  There will be a small memory loss (until
    reboot) generated by the first opener of audio.device or
    narrator.device (memory used in building of audio.device's base).