This repo. is for the CPU upgrade module I am designing for the Sequential Circuits, Inc. Prophet-600 synthesizer. The firmware for this module is Imogen's P600FW v2022, a newer and updated version of the famous GliGli P600FW mod. What's different is this board replaces the need for a modified Teensey++ 2.0, as it has the same AT90USB1286 microcontroller wired to all the same pins, except for the ones that need to be modified as per the original instructions.

Information about the original Teensey++ 2.0 board this is replacing: https://www.pjrc.com/store/teensypp.html.

My plan is to build up one of these boards so that I can upgrade my Prophet-600 and get some better use out of it making music.

Board Revisions

Revision 1.0 - March 2025

Created the board based off the original Teensey++ 2.0 pin out and GliGli's modification instructions
The board uses (for the most part) SMD components. The USB port is hybrid and the pin headers had to be through-hole.
Board component choice is based off of the components used on the MacroPad Project.