Naomi Net Dimm Pi set up

[Copperband]

Forgive the basic question but despite seaching the net and various forums such as this I cant find a simple guide of how to connect up the box of hardware and cables I've received from an auction.
I have a Naomi MB and Net dimm, a Pi and cables for Net booting. I have a PC power supply. It all looks to be there, I just dont want to plug the wrong wires where.

Any pointers, gratefully received.

 

[bbz149]

This Video will help with the setup of the Pi if you have a Piforcetools setup

You say PC Power supply, is it an ATX PSU and if so do you have the ATX to Naomi Cables? Might help to post pic's of what you actually have!!

 

[Copperband]

Thanks, I've watched those videos and they are helpful but I'm struggling with the actual connecting up.
Fiddling around last night, I came to the conclusion that I think i'm missing at least one cable, maybe something else too?

I connected the Naomi and Net Dimm via VGA to a monitor and it switches on and gave a message of Error 34 (to be expected).

Here's a couple of pics of what I have:

I've circled in green 2 spade connectors which come from the power supply, not sure where they go. There are a couple of other outputs from the PSU, but not sure if they are just excess from when it was a PC PSU?

There doesn't seem to be a way to get power to the PI, unless it does this via the 2 leads that are curled up in the shot - 1 with USB and one Ethernet.

I think the Ethernet goes from and 2 the net dimm. The USB I'm guessing does somehow too?

 

[Copperband]

Should have said, there is also what appears to be an IO board / Jamma connector

 

[Monstermug]

The cross over cable (ethernet) plugs into the net dimm and the other end into the pi. The power cable for the pi, should be micro usb cable but the other end should have been modded so that it can draw +5v from one of the unused naomi connector slots. Apart from that, the rest looks right. A separate micro usb power supply will work as well. Just need +5 going into the Pi.



I would just ignore that red cable on top of the naomi with the ? on it. Probably +5v the previous owner used to power the pi with?

The USB cable is used to connect the naomi to the JVS IO. I am assuming you don't have this as you are using a pc psu. If you plan to use this in a jamma cab you will need a capcom/JVS IO otherwise none of the games will work.

Monstermug2020-01-09 13:09:54

 

[Copperband]

Very helpful, thanks!
So for the 5V there is an output on the back of the Naomi which I have seen others use. Presumably, thats a specific cable that I'd need to hunt down?

Althernatively, you say I can just use a micro USB lead which presumably I'd just attach to something like and iPhone plug would I?

Here's the other board:

 

[Copperband]

Power supply sorted. Power everything up and it appears work until it say IO board not connected.
Connected that via the USB / printer like cable?
Copperband2020-01-09 17:12:30

 

[Monstermug]

plug io into jamma edge. other end of usb cable goes into IO. connect phono plugs from IO to naomi Phono. Make sure naomi dip is set to 15k (should already be set as you are getting a picture). Connect VGA cable to IO (im sure you done this already). Bobs your uncle. That's using a capcom IO though. Not so sure about this IO as I've never used this one before. Should theoretically be the same though.

Without IO connected you will get IO error. Some games require it's own special io and you will get IO error regardless. so yes just plug in the usb printer cable and have fun

Monstermug2020-01-09 17:46:04

 

[Copperband]

I realise that my problem is no Cabinet and so no connector to plug to the IO to give it power. I can therfore only see and play around with the test menu for now.

 

[Monstermug]

no supergun?

 

[jonhughes]

There's a lot of gunk on that Altera surface mount chip. Make sure you clean it off or it could act as a potential bridging problem between the chip pins.

 

[Copperband]

I will clean the chips up...while I am waiting to get my naomi cabinet

 

[Monstermug]

I will clean the chips up...while I am waiting to get my naomi cabinet

You shouldn't need the pc PSU if you are getting a sega Naomi cab. Naomi games look sweet on a 31k crt. Nice get. Make sure you upload some pics