I am trying to find information on some MIDI decoder and driver circuit
boards made in the 1990s. The only identifying mark says "WIMP." The
main board has a very early AMD D8031 microcontroller chip.

The driver boards connect with ribbon cables and have WIMP_DRV on them.
The instrument was being played with a floppy disk player.

Bill Klinger

 [ processor circuit board
 [ https://www.mmdigest.com/Attachments/21/04/07/210407_172043_IMG_0429.JPG
 
 [ driver board
 [ https://www.mmdigest.com/Attachments/21/04/08/210408_211148_Img_0438a.jpg
 

 [ The D8031 was a ROM-less version of the popular Intel 8051
 [ microprocessor . -- Robbie