Finally soldered an EEPROM (well a socket actually) on one of the DSP boards and it self boots just fine.
Here is a bad phone picture showing the DAC buffer board (single ended outputs) and the PCM4202 ADC board wired into my test chassis. Boards are stacked so the DSP and DAC are underneath.
An electronics engineer and a long term electronics hobbyist. I like tinkering with stuff and making things.