Sarge's Rectrospective: The Sega NAOMI (Part 3)

Sarge here with your third installment of the Sega NAOMI retrospective. In this installment, I'd like to point out the correct way to setup a NAOMI motherboard in a JAMMA cabinet. For the sake of any beginners reading this, we'll go over a Capcom NAOMI setup. This will also bypass the +3.3 voltage issue by having the Capcom I/O adapter output a 3.3v line that will be good enough to run the NAOMI motherboard. As a disclaimer: We here at Arcade-Hunters.com are not responsible for any damages that may occur due to the instructions below. This is a reference guide for those that are familiar with electrical components and hardware. Please handle PCBs at your own risk and always be careful.

With that out of the way, you'll need the following:

(1) Naomi Motherboard with regional chip installed.
(1) Capcom I/O board.
(1) VGA Output cable
(1) USB connector cable (Type A to Type B)
(1) Red and White RCA cables (male to male)
(1) Capcom CPS2 Kick Harness (optional)
(1) NAOMI cart that matches the region of the motherboard.
(1) 6pin AMP connector

Please refer to the diagram below for any cable/port installation.
(Click picture to enlarge)

Step 1: Take the Motherboard and connect one side of the VGA cable to CN3 on the motherboard and the other to the VGA port on the Capcom I/O. There's only one on the I/O and you can't miss it.

Step 2: Connect the AMP connector from CN1 on the NAOMI Motherboard to the AMP port on the CAPCOM I/O.

Step 3: Plug the Type A end of the USB cable (the one that looks like a standard computer USB end to CN5 in the diagram). Plug the Type B end (the end that looks like a printer USB port) to the Capcom I/O.

Step 4: Plug the red and white RCA cables to CN4. Plug the other ends to the RCA jacks of the Capcom I/O.

Step 5: Select what monitor you're going to be using on the DIPSW selector to the left of the USB port on the NAOMI motherboard. For those with 15K monitors, turn SW1 on and 2-4 off. For those with 31k monitors, turn SW1-4 off.

( Example of dip setting for 31k)

Step 6: Connect your CPS2 Kick Harness to the Capcom I/O. Wire the harness wires to the desired buttons you want.

Step 7: Connect your JAMMA connector to the edge connector on the Capcom I/O.

Step 8: Place the NAOMI game cart in the cart slot (see picture)



Step 8. Power up your cabinet.





The system should then go through the boot up process. If you notice that the screen's resolution seems off, you have the DIPSW setting at an incorrect setting for your monitor. Refer to step 5 again to fix this.

We'll go over the GD Rom setup in the next retrospective. Sarge out!