SEGA I/O Problems

OldFoo · Post by **OldFoo** » Thu Nov 16, 2006 9:38 am

As some of u may know I am trying to consolize my naomi, well sort of. Yesterday i had made the power cables and the usb cable to fit inseide the case along with the I/O. I did a trial run and I get a good boot with mvc2. I dont have any pyhsical controls hooked up just the I/O. So today I go to wire in the controls and now I am getting an I/O not present error on boot. Im following this http://www.neo-geo.com/forums/showthread.php?t=153310 to get ideas from. Now in this pic http://img177.imageshack.us/img177/6944/h3qu8.jpgit shows that he has 5v connected to 2 and 3 and ground connected to 12 and 13. On this page it shows to connect 5v to 1 and 2 and ground to 13 and 14 wich is what I did.http://solvalou.mine.nu/beginner/naomi.html#sega_io

This is driving me crazy tonight and I think I shorted out my naomi on accident checking voltages. :smt013

OldFoo · Post by **OldFoo** » Thu Nov 16, 2006 4:44 pm

This is the power connector pinout:

CN2:

Row 1= NC,3.3v, 5v

Row2=GND,GND,GND

CN3:

Row 1= NC,3.3v,5v,12v

Row 2=GND,GND,GND,GND

GND=Ground

NC=Not Connected

Hope this helps!

OldFoo · Post by **OldFoo** » Thu Nov 16, 2006 4:58 pm

I have that down. It powers up fine. I was meaning I hooked up power to the I/O board since it doesnt get power from the usb. Am I wrong on this.

OldFoo · Post by **OldFoo** » Thu Nov 16, 2006 5:00 pm

That's correct. The I/O needs to be supplied with 5v and 12v. This could be done through the dedicated power connector on the I/O or through the jamma edge (assuming this is the jamma version).

OldFoo · Post by **OldFoo** » Fri Nov 17, 2006 9:45 am

Hi,

From the piccy here

http://solvalou.mine.nu/beginner/naomi.html#sega_io

you need to be looking at the 6-pin header, and using this to power the I/O.

Pin 1 & 2 = +5v

Pin 3 & 4 = +12v

Pin 5 & 6 = GND

John