8 May 93
      Roger,

      Enclosed are three disks for your VPU-40.  I hope that one or
      all of them will bring it up for you.

      What I have done is copy each of the three disks - which were
      360k disks - on to a 96tpi format that is what your machine
      uses.  That means that each of the disks is really only half
      full - tracks 0-40 rather than 0-80.  Assuming that you can
      boot your VPU-40 with one or more of these, one of the first
      things that you will want to do is format new disks at 96tpi,
      copy all of the files from one or more of these disks, and
      SYSGEN the operating system onto it.  That will give you twice
      the space that you have with these.  You will then want to do
      the same for the remaining disks.

      I suspect, but I'm not sure, that each of these disks has a
      slightly different version of the operating system on it.  You
      will want to compare them and see which works best and settle
      on that one.  You may want to keep the others, however.

      I've also enclosed several pages of information about the
      Compustar computers in general, and about the serial ports on
      the back side.  Hope it all helps.  

      Good Luck!
                                              - don