Attached are two JPEG files, one of the roll reader, and one of the
punch at Custom Music Rolls.  They are both 640 x 480 pixels.  You can
put them on the MMD web site.

I thought I would start with these.  Of course, I have tons more of
various views and details, but they do take up a lot of room.  If you
have room for two more, I could send one of the back side of each.  The
back side of the reader shows the contact boards and the electronic
package.  The back side of the punch shows the driver boards, power
supplies, and wires to the interposer solenoids.

The reader and punch were completed in 1979 and were operated by an
Interdata 7/16 minicomputer that had 16K of core memory.  Now, the real
time control programs run on a single board computer located in the
reader and punch electronic package.  The real time computer gets or
sends roll data to the master reader or punch program running on a
Macintosh.  I had to add a monster isolation transformer to the punch to
keep the motor starting transient from crashing the computer in the
punch.

Richard Tonnesen

[ Thanks, Richard, they're now at http://mmd.foxtail.com/Pictures/
[ Send some more!  -- Robbie