analog.fi

CPU UPGRADE FOR SCI PROPHET 5 REV2

Latest upgrades: 2014/07/10: Prototype board ready. The project for next odd years has finally started.

From the beginning it was quite clear to me to do two versions of the upgrade: One for stock P5 and one with new CPU board having MIDI and other goodies to get around the limits of original hardware. The new CPU board has more RAM and ROM for running more code and having more patch storage, midi in / out, etc.

For easy (lazy) adapting from current code I choosed to use the Z80 instead of modern uC.

Planned features:
- MIDI
- More keyboad assign programs / Arpeggiator
- Better control of CPU generated LFO (2nd LFO) such as assinging output to any programmable pot on frontpanel.
- More waveforms for second LFO
- More patch storage space