Boss DS-1 Distortion
A distortion pedal probably used by Prince in the studio around the Sign O The Times era. Susan Rogers has mentioned Prince using an orange distortion pedal in the studio with his Linn LM-1 drum machine. It is unknown whether he used this pedal with his guitar.
Brownmark also used a distortion pedal on songs like Computer Blue, and it is possible that it was a Boss DS-1. An orange pedal can be seen in the Manic Monday video.
It was also used by Dez Dickerson.