max badwan wrote:Edit: does the 909 output MIDI clock and DIN 24 simultaneously? If so, you're sorted.
The TR-909 can sync to external DIN Sync24, but not output DIN Sync24. It would be possible to use the TR-606 as master clock with its DIN Sync24 output to the 909's Sync IN and then MIDI OUT of the 909 to MIDI IN of the PR-100. But it'd probably be best to find a MIDI to DIN Sync box to slave the 606 with.
Also, the PR-100 uses 2.8" QuickDisks which are impossible to find new and most disks are now 25 years old and could be corrupt. Just a friendly warning.