support for audio cd discs under Ultrix

[Rusty Wright]

Does Ultrix have any ioctls for controlling the CD-ROM (RRD40 I think)
for playing audio cd discs?  For example, on Suns there are a bunch of
ioctls to start playing at a particular track, pause, resume, stop,
eject, etc.  I seem to remember from a picture I saw a while ago that
there is a headphone jack on the RRD40 drive, but I may be wrong about
that.