Sega Naomi & UVC

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trev1976
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Sega Naomi & UVC

Post by trev1976 »

Hi

Im interested in a Sega naomi set up but I'm a little confused how to connect it all.

I'd like it to go in s sega aero city and ideally convert 31khz to 24khz via a UVC , how would I get the controls to work ? Also is it easy to net boot ?

Thanks
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DaveyD
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Re: Sega Naomi & UVC

Post by DaveyD »

You'd be best to put it in 15khz mode on the Naomi, which is just a case of flicking a dip switch.

Power it with an atx, or sun PSU from a Naomi cabinet, then use a sega, or capcom I/O for the controls.

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trev1976
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Re: Sega Naomi & UVC

Post by trev1976 »

I've heard that if you do it via the dip it outputs in 480i which my MS8 hates so was really looking to get 240p or 360p from the naomi.
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StalkS
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Re: Sega Naomi & UVC

Post by StalkS »

Hey @trev1976

Did you ever come up with a solution for Naomi and the MS8 480i issue? Was it an issue?

Thanks

StalkS
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trev1976
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Re: Sega Naomi & UVC

Post by trev1976 »

Hi

No I've decided to run it through my 31khz CRT VGA monitor I have kicking about.

Much less agro 😀
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Re: Sega Naomi & UVC

Post by StalkS »

:thumbup: OK thanks - I'm just aboutto give it a go
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trev1976
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Re: Sega Naomi & UVC

Post by trev1976 »

Ok let me know how it goes as it still something I'm interested in . Some pic's would be nice ☺
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Re: Sega Naomi & UVC

Post by copados33 »

Short/quick answer to the OP, its easy, just connect the UVC converter in between the Naomi motherboard and the Sega/Capcom IO;

So...you will need to build a 0.156” molex to VGA cable, then connect the UVC to the IO VGA input, blame the UVC manufacturer for providing only one output connector.


PS: You also will have to find a way to feed the UVC with +12V and +5V from the Aero city Power supply, I didn't want to hack the orginal harness so I just installed a 2nd p.supply besides the Sega/SUN PSU feeding the Naomi system.
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StalkS
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Re: Sega Naomi & UVC

Post by StalkS »

Just out of interest would this be a suitable UVC for the job? Does anyone have any experience with them? Is it 480P output?

https://rover.ebay.com/rover/0/0/0?mpre ... 3246797228

20150812140335ti0w673.jpg

Spec below:

Specifications:
Model Number: GBS-8100
Input Power: DC 5V ±0.5V (2A) P1 or P2
Input signal:
640 * 480 @ 60 / 72 / 75 80 / 85 Hz, 800 * 600 @ 60 / 72 / 75 80 / 85 Hz, 1024 * 768 @ 60 / 72 / 75 80Hz, 1280 * 1024 @ 60 / 72 / 75 Hz (Auto scan) P3
Output Signal:
CGA: 640 * 480 P7
VGA: By Pass P4
Video: 480p NTSC & PAL P5
S-Video: 480p NTSC & PAL P6
User controls (Menu Keys): Output Switch, Image Zoom, Image Position, Output adjust.

Thanks
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Re: Sega Naomi & UVC

Post by Asure »

Here's a vid (not mine)

It looks a bit a unsharp, but that's to be expected. The overlay letters look nice & crisp, video levels seem a bit low on the scaled image (a lot darker than the menu text..)
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Re: Sega Naomi & UVC

Post by StalkS »

Actually looks alright for the price. I am still not sure if outputs at 480i or 480p though.

Thanks for the video.
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Re: Sega Naomi & UVC

Post by copados33 »

StalkS wrote: October 6th, 2018, 2:51 pm Actually looks alright for the price. I am still not sure if outputs at 480i or 480p though.

Thanks for the video.
The whole point of the UVC is its 31khz to 24khz conversion feature, and you will not get 480p in 24khz, nor 480 interlaced (which is 15khz), the OP is looking to get 24khz from the UVC whose output resolution is 386p or something like that, then select 24khz input on the MS8-26's chassis.
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Re: Sega Naomi & UVC

Post by Asure »

Possibly both. The PDF says 480i@60Hz on the rgbs out.. connector P7
There's some 480P on the other connectors, but those are not rgbs. :(

http://www.hollandcomputers.com/data/Im ... uction.pdf
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trev1976
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Re: Sega Naomi & UVC

Post by trev1976 »

copados33 wrote: October 6th, 2018, 10:00 pm
StalkS wrote: October 6th, 2018, 2:51 pm Actually looks alright for the price. I am still not sure if outputs at 480i or 480p though.

Thanks for the video.
The whole point of the UVC is its 31khz to 24khz conversion feature, and you will not get 480p in 24khz, nor 480 interlaced (which is 15khz), the OP is looking to get 24khz from the UVC whose output resolution is 386p or something like that, then select 24khz input on the MS8-26's chassis.
Yes exactly
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