What's the 9V?

[nonosto]

Hello world

I would like make a new efficeint power supply for my Saturn with Pico PSU. Rhea/Phoebe inside. But there is 9V. Can I dont use it like 12 V on Dreamcast with GDEMU/USBGDROM? Why we use 9V?

THX

[zyrobs]

It depends on model. The later model 2s with single boards only use 9/12V in the AV out for the SCART power.

The earlier units use it at least for the CD drive (which Rhea doesn't need...), and of course the AV out. I'm not sure where else. I seem to recall the memory using it, but I think that was the 3.3V line not the 9V one. You'd need to check the schematics for this.

I'd just put a 7809 in there for that line.

[nonosto]

THX. It's seems 9V needed for RGB output. 5V for Rhea/drive and I assume the 3.3V for the motherboard. I use the first version double LED Saturn (or V saturn).