Sega Naomi Sale incl. RARE SEGA VERSION 2 I/O (56k warn)

Hey folks,
I got Naomi setup here I decided not to keep. Here is what I have:

-Naomi motherboard
-Sega VERSION 2 I/O converts audio and power! see here: (http://www.sega-naomi.com/hardware.htm)
-analog harness (HOLD)
-audio astro harness (HOLD)
-VGA OEM cable
-USB SIO cables

and here are the pics:







COMPLETELY JAMMA READY plus some extra stuff. I really don't know much about this Sega I/O since it is so rare and undocumented but I believe it has a few advantages over the Capcom one. It outputs a TON of power so maybe it can be used to power a full GDrom and Naomi2 setup without an additional power supply? It's rated 3.3v@7A + 5v@5A! It also has a full built in audio amp and every other port that you could possibly need. Has stereo to mono switch and volume control knob as well.

Looking for cash mostly but if you have Cave or shmup PCBs I'm willing to trade for stuff I'm after.

-Segasonicfan

segasonicfan said:

I'll post pics later and if this stuff doesn't sell here it goes to the bay.

Click to expand...

Throwin' the fish back

http://cgi.ebay.com/ws/eBayISAPI.dl...MEWA:IT&viewitem=&item=150129148765&rd=1&rd=1

You cab/gun PSU also needs to have a strong 5v+ line in oder to exploit the GD-rom hack, I had a Sega PSU that could not quite do it.

Throwin' the fish back

http://cgi.ebay.com/ws/eBayISAPI.dll...8765&rd=1&rd=1

Click to expand...

Yup, I'd like to keep it but I'm having financial troubles so I can't.

You cab/gun PSU also needs to have a strong 5v+ line in oder to exploit the GD-rom hack, I had a Sega PSU that could not quite do it.

Click to expand...

was it the model 2 Sega PSU tho?

-Segasonicfan

*bump* pics added.

-Segasonicfan

Out of sheer curiosity, what is this "GDROM hack"? Not looking to buy but consider this a free bump.

DanAdamKOF said:

Out of sheer curiosity, what is this "GDROM hack"? Not looking to buy but consider this a free bump.

Click to expand...

Running the GD-rom of the I/O without a separate PSU, by having a strong 5v+ line, this is kinder already explained.

segasonicfan said:

was it the model 2 Sega PSU tho?

Click to expand...

It was, how the hell did you know that?

Naomi.

I have run GDrom and Naomi 2 boards with a Capcom IO with no problems at all on 3 different cabs, I think you only have a problem with a Naomi 1 mobo which uses more power.

thegreathopper said:

I have run GDrom and Naomi 2 boards with a Capcom IO with no problems at all on 3 different cabs, I think you only have a problem with a Naomi 1 mobo which uses more power.

Click to expand...

Naomi 2 uses more power, games like VF4:FT need the most, although its not recommended to run it like this.

RGP said:

Naomi 2 uses more power, games like VF4:FT need the most, although its not recommended to run it like this.

Click to expand...

According to sega-naomi.com and many people's experience, this is not correct. Often, people are able to run GD-Rom/N2 combos on a standard power supply, but far less often are people able to run GD-Rom/N1 combos on a standard supply, due to a more power-efficient design of the N2 board.

Personally, my standard JAMMA supplies will not provide enough power for N1/GD-Rom combos, and I do not have a N2 at this time, so I cannot validate one way or the other, but wanted to ask your source so I could start to put together what is the truth. In my case, the Red/Yellow/Green status light on my HAPP supply goes yellow (5v LOW condition) when the GD-Rom is connected along with the Capcom I/O and N1, no matter how high I put the voltage. I need to use an external supply.

danox574 said:

According to sega-naomi.com and many people's experience, this is not correct. Often, people are able to run GD-Rom/N2 combos on a standard power supply, but far less often are people able to run GD-Rom/N1 combos on a standard supply, due to a more power-efficient design of the N2 board.

Click to expand...

The reason why the N1 can't power the GD-rom is that it is wired differently inside, I didn't state this before.

Sega-Naomi.com belongs to me.

I've just made a quick edit to the hardware section on Sega-Nomi.com, all based on my own personal experiences

Naomi

RGP said:

Naomi 2 uses more power, games like VF4:FT need the most, although its not recommended to run it like this.

Click to expand...

I always wondered who is this person who does not recommend powering a GD rom setup from a Capcom IO.

I would of thought the whole idea of a Capcom IO was to power the GDrom and mobo without a extra power supply.

ps . Sorry for spamming up your sales thread.

RGP said:

The reason why the N1 can't power the GD-rom is that it is wired differently inside, I didn't state this before.

Sega-Naomi.com belongs to me.

Click to expand...

Well I'm not done spamming up this damn thread!

I made a GD-Rom power cable that connects directly to my JAMMA PS. Basically, the Capcom I/O is powering the N1 board, and the GD power is connected separately to the PS before it hits the Capcom I/O. It still results in the 5V line going too low, and the GD-Rom not being recognized, and I've worked around it by running a Sega PSU in parelell and powering the GD-Rom off of that.

Is it still a load issue in that case?

*free bump*

thegreathopper said:

I always wondered who is this person who does not recommend powering a GD rom setup from a Capcom IO.

I would of thought the whole idea of a Capcom IO was to power the GDrom and mobo without a extra power supply.

ps . Sorry for spamming up your sales thread.

Click to expand...

Capcom sold them only to power the N1 board as they came in full MVC2, CVPro kits & not CVS2 kits, Capcom did in fact say once (source from a Japanese member on my old forum) say that the did not recommend the N2 trick (also supporting it was a hack is that they made no games just for N2) as it could damage the Capcom I/O board.

The GD-rom drive is designed to run off 3.3v not 5v.

I now use a PC ATX PSU to run my N2 board with GD-rom set-up & just use the 5v line coming from my cabs PSU to run the sound amp inside the Capcom I/O.

Sorry for spam, but hopefully this will of ansered some questions a potential buyer might have

Thank you.

The GD-Rom running of 3.3 and 12 does not appear to be the case on both of the GD-Rom cables that I have, as well as the schematic from Sega Service for the wiring diagram here.

http://homepage.mac.com/dmowczan/NaomiWD.pdf

Notice the 5V lines are color 30 (Yellow), 12V is color 10 (Red), and Ground is 50 (White). These are the only colors going to the GD-Rom connector. The 3.3V, Color 'C', or brown, is not connected to the GD-Rom connector.

I measured the voltages on both my GD-Rom harnesses tonight -- 5V and 12V are carried to the GD-Rom, not 3.3V and 12V. Here's a photo of one of my harnesses:



Note, nothing is connected to the 3.3V line.

It's certainly possible you have managed to run your GD on 3.3V and have it work -- for all I know, the 3.3V powers the fan and the 12V powers the logic, so it works fine. But the GD-Rom is designed to run off 5V and 12V, schematic and real-world harness proof, not 3.3 and 12.

If you have a differing documentation or schematic, please let me know. I understand you have it working this way which is great, but I'd rather be exact when we give this information out.

if nobody wants this I'll be dumping it on ebay soon.

-Segasonicfan

segasonicfan said:

if nobody wants this I'll be dumping it on ebay soon.

-Segasonicfan

Click to expand...

Be so nice if you actually put up a price....