Royal AR-80

[Cranium]

Anybody ever heard of a music machine manufacturer called Royal?  I
recently picked up a model AR-80 music composer.  Think of an early
'80's auto accompaniment unit.  Like Roland drums (the early sampled
ones) with built in bass and chord (or Arp).  The cool thing is, it's
totally programmable.  Bass, chords, everything.  It goes from being
incredibly cheesy box, to a functional thing.  Like a set of Roland x0x
boxes, except self contained, and doesn't sound like everyone else.  Not
my typical cup of tea, but a neat beastie.  
      Anyhoo, any knowledge of the beast or (yeah, right!) schematics
would be EXTREMELY helpful!

                      Mikel Z