I ordered from Tubbutec (https://tubbutec.de/sh-1oh1/) new brains for my Roland SH-101. The mod is called SH-1oh1 and it replaces the old 80C49 CPU with new one. This adds MIDI and other new features to SH-101. The features I especially like are:
- additional filter LFO and ADSR
- sequencer remembers 32 sequences with 120 steps each
- programmable clock dividers for arpeggiator, sequencer and random LFO
I must next order from Stereoping (http://www.stereoping.com/synth-controller-editions/?lang=en) a nice DIY MIDI-controller for SH-1oh1 modified SH-101. I also ordered a new power-switch and resonance slider-pot from Syntaur (https://syntaur.com/default.asp). I replace all the old trimmers to make the adjustment procedures easier (critical trimmers are now multi turn types).