Sega Naomi I/O Error -- Update

Just got my PSU situation sorted out and now I've got a new problem. My setup is: Naomi 2 Motherboard, GD-Rom, Capcom I/O and a SUN Naomi PSU.

I've got my Supergun connected to the Capcom I/O with the JAMMA & Kick-Harness Connectors. Capcom I/O conntected to the Naomi 2 with the VGA, Stereo RCA & USB Cables. The Naomi 2 connected to the PSU with the 8-Pin Header, which splits off and also supplies the power to the GD-Rom. And lastly the DIMM Board connected to the GD-Rom with the SCSI Cable.

Everything boots and I get video, the GD-Rom loads the game and then after it restarts itself I get this error: ERROR !! I/O bd is not connected to Naomi bd

All the DIPS are down besides the first one for low-res video and I am getting proper video. Also I've tried swapping out the USB Cable and that hasn't helped either. Any suggestions? The game I'm trying, the only one I have, is Guilty Gear XX btw.

Also I'll just note, I know it's possible to get away with not using an extra power-supply with a Capcom I/O & Naomi 2 on a GD-Rom setup.. but my Supergun's PSU isn't nearly powerful enough for that.

Thanks,
Kickin' Wing

A picture would be nice

I think the problem is that you still need to power the Capcom I/O so just turn up the power on you SG PSU a little to about 5.2-5.4v, you do have a Multi-meter?

I'm unable to adjust the power from my SG's PSU. It's a Jameco SC200 (4A on the 5v & 1A on the 12v). Here's the pics:







-Kickin' Wing

I've had that, the I/O will need it own power as it has a built in sound amp, so just up it a little, I run a similar set-up in my Impress

Thanks for your replies. Since I can't adjust the power to the Capcom I/O, I guess I'm screwed on this setup.

Might have to buy some mounting brackets, take it down to the Mini Cute and figure out some way to fit it all in & route the PSU's power cord out the back if I decide to keep it.

-Kickin' Wing

Kickin|wiNg said:

I'm unable to adjust the power from my SG's PSU. It's a Jameco SC200 (4A on the 5v & 1A on the 12v).

Click to expand...

You can adjust the voltage on the SC200, see my posts here:

http://shmups.system11.org/forum/viewtopic.php?t=12538

Given the popularity of this desktop PSU this info should be stickied somewhere.

Kickin|wiNg said:

Thanks for your replies. Since I can't adjust the power to the Capcom I/O, I guess I'm screwed on this setup.

Might have to buy some mounting brackets, take it down to the Mini Cute and figure out some way to fit it all in & route the PSU's power cord out the back if I decide to keep it.

-Kickin' Wing

Click to expand...

I used to run my N2 in a Mini-Cute using just the Capcom I/O & the PSU turned all the way up to 5.9v.

www.sega-naomi.com/photos/mini.jpg

nm

This is really strange -- the only thing your SG power supply is actually powering is your Capcom I/O. Since you're not running a 8-pin cable out of the Capcom I/O to the Naomi board, and you are using the original SUN PSU, that should have plenty of juice to handle both the N2 and GD-Rom, after all, that power supply does all that and more in a full Naomi cabinet.

To be honest, this looks like a bad PSU or bad I/O, seizing up on the soft reboot when the power is still applied. I/O board not connected means that it's lost communication through USB with the Capcom I/O, there's a different error if the GD-Rom goes away.

The traditional 'Capcom I/O doesn't provide enough juice for N2 + GD-Rom unless you crank up the 5V line' is a problem when you are NOT using a real Sega PSU for power. Having the Sega PSU is the best solution to this problem, and you have it set up right.

The one thing that is different in my working setup (with a power hungry N1) is that the motherboard is powered from the 8 pin connector on the Capcom I/O, not from the Sun PSU. I'll try to set mine up like yours and see if it makes a difference tonight.

-Dan

Thanks for your help everyone. I just tried everything in my Mini-Cute and I'm getting the same error, in super tiny text. Starting to think something might be wrong with either the N2 board or the Capcom I/O.

-Kickin' Wing

What voltage is you cab set at?

The I/O Board is getting 5.107V. Just went to try everything one last time and was able to make it work by increasing the +5V on the SUN PSU to a little over 5.1V. And now everything works

I got some weird message once the game started, no idea what it said--it's increadibly hard to read some text on that small screen. But I did make out Press Start, so I did that a few times and the game started right up.

Super Happy Pics of my Naomi Working:



Thanks again to everyone who replied.

-Kickin' Wing

So I brought the board back up to my Supergun today and tried it, only to get the same error as before. I tried it again w/ my multimeter handy and increased the +5V on the Sega PSU to 5.1V and the 3.3V a little so it was about 3.305. I also checked the +5V going to the Capcom I/O and it read 5.104V.

Also, I should mention I'm metering off the back of the male 8-port connector attached to the N2 motherboard. And directly on the contacts of the Capcom I/O.

Everything started up fine that time and I was able to play around in GG for a while. I shut it all down and when I went to try it again just now I get that damn I/O Error. I increased the +5V going to the N2 to 5.2V and still nothing. Also increased the 3.3V to 3.35 and that didn't seem to help either.

Not sure what to make of the situation, but now nothing I seem to do gets it going. I'd appreciate it if someone w/ a working N2 GD-Rom setup would post their 5 & 3.3 voltages metering off the board in a similar way, might help me to adjust those then I can worry about what else might be causing this.

Thanks,
Kickin' Wing

Finally the system is booting reliably. I bought new Power Cables from Excellent (605-0041 & 605-0042) and am now hooking up both the 8 & 6-port Power Connectors from the Sega PSU.

I was able to drop the voltages back down (5.1V & 3.32V--won't go any lower) and it still starts up without any I/O error.

Also picked up Border Down & Capcom vs SNK, so I got a few more things to play around with.

Thanks again to everyone who posted. Hopefully I won't have any further need to update this thread.

-Kickin' Wing

Glad you got it back up K-Dub.

Yet another bump in my Naomi Nightmare. Just got a bunch of new games and went to try out Zombie Revenge (cart game) only to come up with this I/O problem again.

For some reason Zombie Revenge doesn't give an error that the I/O board isn't connected--maybe because it has its own CP you can use?--but it won't take any input from my joysticks or Supergun buttons.

If I go into Test Mode > JVS, it says there's no I/O Board connected. I've gone into the Game Test and changed the joystick to Digital and still nothing.

Thinking there's a real problem with either the Naomi Motherboard or I/O board, maybe the USB connectors are miffed (I have tried different cables). Any thoughts?

Again if anyone can tell me what their +5 and 3.3V's are set to on their motherboard, I'd really appreciate it.

-Kickin' Wing

:edit:

Got it working after another try, played for a bit. Then swaped to Melty Blood (GD-Rom Game), everything came up fine w/ Audio & Video but no controls. Went to the Test > JVS menu again and it said no I/O Board.

Zombie revenge needs to be set to normal digital joysticks in the bios, as it uses analogue sticks by default.