DCOs are driven from single source, being one VCO and dividers.
Simple oscillator made with CMOS logic gates (4-input dual NAND, AFAIR) has only few semitones tuning range
generating about 4MHz signal for 12 dividers made of 40103. 12 frequencies go to DCO section, which is actually a
bunch of multiplexes and dividers choosing one frequency/division set according to Generator Controller data.
Each of 8 DCOs generates at output 5 square waveforms or rather address for Sampler section
no schematic yet