[PX2]

Thank you all for your suggestions and detailed info about the cables and signal types, glad to see that we can get the issue moving 🙂

Hopefully this weekend I will have some time to take apart one of the SCART cables I purchased, I want to check the wiring, try what “NoAffinity”and “Sean B” suggested and follow the diagrams provided by “BuckoA51”.
If that works then I will purchase quality cables which should definitively fix the issues.

I will keep you posted

[PX2]

Hi BuckoA51,

Ah, I hope that’s the only problem then…
How do you differentiate the RGB and non RGB cables?

[PX2]

Hi Harrumph,

I use the default cable delivered with the SNES (similar to the one from the N64 BTW), it is visible in the picture hereunder.
Indeed, I left the settings on line 2x as I know that it should be supported for most consoles.

I agree with that statement, if the screen can show the test-screen, and if the OSSC states it is synced… It should work.

Any way to verify the video output format of the SNES?

[PX2]

I’m back with still the same support request…

I haven’t got any time to try out / play with settings and consoles since beginning of May.
This weekend I got to get a part of my consoles (some Nintendo models) delivered home, so I thought it would be a good way to check if the OSSC works with those.

Unfotunately I have the exact same result… Sync and Audio but no video.|
I decided to remove all components between the OSSC and the diffeerent screens I tested and still I can’t make it work for any console.

As a refreshner:
I get to see the “test” screen (grey window) when I start the OSSC, but as soon as I select “input 1”, I can hear the music of the game but get no image at all.
As addition to the aforementioned consoles (Sega PowerBase, Sega Master System II, Sega MegaDrive 1) I tested with the European Super Nintendo and N64 I have and really can’t get it to work. I tried on a classic (cathodic) TV, and then all consoles worked.

When I try to connect the Super Nintendo I get following on the OSSC screen:
AV1: RGBS 312P 15.59KHz 49.99Hz but no image. How is it possible that I can’t get the video if the OSSC is synced?!
I’ve tried several screen (via HDMI) tried DVI format and other settings, but really nothing works.

So I got to a stage of irritation/frustration by this OSSC.
Can someone help with some debugging?

[PX2]

As promised, I post an update regarding status of this topic:

I received the cables (C-pin RGB Scart PAL cable) acquired here:
https://www.ebay.fr/itm/RGB-Scart-PAL-Cable-C-V-Pin-For-Sega-Genesis-1-Mega-Drive-MD-1-Master-System-1/253093982906
Yes, I know it’s cheap Chinese cables, but it should do the work for debugging, once I know whatthe issue is I will buy quality cables 🙂

Unfortunately, now I don’t even have sync anymore (according to LCD screen of OSSC) and as you can imagine that also means no video… Only audio.
I’ve done some research and it seems that, to make things simple, SEGA made specific consoles for the French market, distinguished by the name “SEGA RGB on their sticker”.

Now I’m wondering if this is true, could any of you confirm that you don’t have names such as below on the serial number sticker of consoles?
SEGA MEGA DRIVE RGB
SEGA MASTER SYSTEM II POWER BASE RGB

If this is true does it means that I will have to do some tricks to use the cables I bought to make them RGB cables and not PAL?

[PX2]

Hi all,

Thanks for the support, appreciated!

Regarding the MegaDrive / Genesis:

That’s exactly what will happen if you feed in composite video (only).

I’d say getting a new cable is your first point of call, I do not have any idea what’s in that big box on your current cable.

I have that same “Adapteur RVB” and I couldn’t ever get it to work with the OSSC so I bet that’s your problem. I have a different cable that is working fine.

Here’s some incomplete info on the internal workings of that box:

http://www.smspower.org/forums/11012-AdaptateurRVB

That’s actually pretty interesting to know, it also means that all cables I have (all French DIN => SCART cables have this adapter) are now completely useless.

I will get a “adapter-less” cable for genesis and let you know how that helps.

Regarding the MultiMega:

Since you got an image with the Sega CD Menu the cable should be good. What you can try is setting TX mode to DVI.

If you start the Latency tester in the Post Proc menu you should see a white box on the screen. If the screen stays black then its your monitor but if you see a white box then its your console/cable.

BTW 19.60Hz is a typo right? It should be near 50Hz.

Yes, my bad, it should have been 46.60Hz, I corrected it…
I tried both TX settings, it started working, did reset settings of the OSSC and it kept on working, so I guess there was something wrong with console.

Thanks all, will keep you posted regarding the Megadrive (and Master system), I hope it’s just that adapter.

[PX2]

Hi, thanks for your answers,

”Scart rgb adapter”, do you mean it’s a composite cable with a scart adapter head? Because composite video doesn’t work on the ossc.
Though it doesnt make sense it can show the mega cd menu then…

What I mean by SCART/RGB adapter is this beautiful thing:

I have no idea of the type signal (whether it’s composite or something else), so please confirm if you know about it.

Have you tried:

Output Opt >

240p/288p proc
pass thru

Yes, I tried all the settings for that resolution… It remains a black screen.

I was just wondering about the system type, checked wikipedia:

As 90% of the consoles I bought comes from France I guess it’s all SECAM.
I’m not sure about the MultiMega tho, anyway to check the signal type somewhere?

I just did a reset and after that even rebooted the OSSC (to check if I still get grey window = yes), did the above again but still LCD provides same values and no video on the screen.
As I’m not an expert in video formats/signals, I was wondering if it’s possible to have a partial signal that allows to sync but not enough to provide the video? (I guess not).

Any clue?

[Author]

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