Help on understanding the pin-out of a Sega Naomi I/O adaptor

It is supposed to convert the Naomi output into JAMMA:



And here it is the pin-out:

http://www.seuservice.com/manuals/KITS/NaomiWD.pdf

My idea is to use it ONLY for controls, as I should have everything else covered.
The only problem is that I am not sure if the Sega I/O need to get power itself. From this manual:

http://www.seuservice.com/manuals/KITS/NaomiWD.pdf

it looks like it needs power in the CN6:

+5V in 1,2
+12V in 3,4
GND in 5,6

Are the 30K, etc. supposed to be values for resistors in ohms to be installed there?

Am I right? Anyway from the picture this CN6 connector looks weird, with like 2 rows of 12 pins, similar to IDE cables.

Can somebody with a Sega I/O try to explain more about how it works? Thanks.

Even though I don't have a Naomi it seems to me that CN6 is the 6-pin white molex to the right of the black connector (and partly hidden by it). The black connector is CN7 (26 pins) and the unlabelled 14-pin connector is for the kick harness (but different from the Capcom kick harness). The numberings 30, 50 etc. are probably just to understand which pin/wire is which (ground is always 50, etc.).

Yup, everything you say looks correct (as always) and now I understand this much better. I'm just wondering why they couldn't make the diagram more smilar to the real deal. Anyway I've been told somewhere else that the Sega I/O shouldn't need power itself, so things look good.

Thanks for the

Amano Jacu said:

I've been told somewhere else that the Sega I/O shouldn't need power itself, so things look good.

Click to expand...

I don't see how those ICs could work without power: some of them must be responsible for the USB controller encoding.

Maybe they just get power from the USB port itself?

30k 50k etc are just SEGAs weird system for colours. Download a manual for naomi or some old model x board to check wich is wich.

Thanks, but I've never been able to find a Naomi manual for download. Anyway I already figured out what is the "code" from that pin-out.