A blog about electronic instruments from a DIY standpoint
The Boss DR-110 is an analogue voiced drum machine which was released in 1984. I believe the Dr-110 was the last analogue drum machine by Boss/Roland Corp.
The DR-110's digital noise source keeps it from being fully analog.
Did you try adding trigger ins for the PB300?
I didn't add voltage triggers, but I did replace the CPU and include MIDI triggers.Here's a picture: https://i.imgur.com/9X9oU5h.jpg