Useful Resources For Synth Nerds..
Roland Stuff
Roland Synthesizer Factory Patches : Roland Factory Patches
Korg Delta Stuff
Owner’s Manual: Korg Delta DL-50 Owners Manual
Service Manual: Korg Delta DL-50 Service Manual
Top Octave Chip: ay-3-0214 Datasheet
Divider / Keyer Chip: s10430
Maplin Spectrum Synthesiser Manual
Construction Manual: Maplin Spectrum Synthesiser Construction Manual
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Boss DR-55
Service Manual: Boss DR-55 Service Manual
Clear Version: Boss DR-55 Service Manual (Clear)
Mattel Synsonics
Service Manual: Mattel Synsonics Service manual