OSSC (DIY video digitizer & scandoubler)

[pyrotek85]

Has there been any success on getting the SNES to play happy with the OSSC? I've got a SNES mini with Voultars RGB bypass. Losing sync like crazy on the OSSC with a csync SCART cable. I also installed Bad_Ad84's Ultimate CIC board, which includes timing crystals for both PAL and NTSC modes. I doubt that's affecting it?

Sounds like the issue I had, have the same mod. Needed to change the TTL jumper on the board.

https://www.videogameperfection.com/for ... after-mod/

[eric90000]

Sounds like the issue I had, have the same mod. Needed to change the TTL jumper on the board.

https://www.videogameperfection.com/for ... after-mod/

That's what I can't figure out, the cable I'm using is wired for 75ohm Csync (resistor on csync line), So I shorted the TTL jumper on Voultars board, still started getting sync dropouts on OSSC.

I've just tried opening this TTL jumper too, that yields the same result unfortunately.

I've tried SCART cable into gscartsw_lite with sync regeneration both on and off, and SCART straight into OSSC. Same results

OSSC display is showing 15.74kHz and 60.08Hz. When the image is displayed on screen it looks fantastic, it just can't hold sync. The red light on the OSSC comes on frequently, indicating no sync.

P.S. are you using a SNES mini?

[pyrotek85]

Yep, SNES Mini. I don't have that extra timing board, but I'm not knowledgeable enough to say whether that's your problem here or not.

[marqs]

Has there been any success on getting the SNES to play happy with the OSSC? I've got a SNES mini with Voultars RGB bypass. Losing sync like crazy on the OSSC with a csync SCART cable. I also installed Bad_Ad84's Ultimate CIC board, which includes timing crystals for both PAL and NTSC modes. I doubt that's affecting it?

Is OSSC losing sync (red led blinking, character LCD info changing) or just your display? The former is typically a cable/connection issue while latter is a compatibility issue. I just got a spare Famicom for trying out soon a dejitter mod idea that could get rid of the intrinsic sync jitter on NES/SNES 240p signal.

[eric90000]

Is OSSC losing sync (red led blinking, character LCD info changing) or just your display? The former is typically a cable/connection issue while latter is a compatibility issue. I just got a spare Famicom for trying out soon a dejitter mod idea that could get rid of the intrinsic sync jitter on NES/SNES 240p signal.

Hey Marqs. Yeah the OSSC is losing sync, the red led flashes fairly frequently but the lcd info doesn't change I don't think.

The TV is also losing picture whenever the OSSC red led flashes. I'm really not sure what the issue is, as others have reported success with Voultars board and a csync cable.

I guess it's possible that it's the supercic mod that includes new timing crystals?

[Guspaz]

Make sure the sync level setting (TTL vs 75ohm) on Voultar's board matches what type of cable you're using.

[eric90000]

Make sure the sync level setting (TTL vs 75ohm) on Voultar's board matches what type of cable you're using.

The cable is a 75ohm packapunch Snes csync cable from retrogamingcables.co.uk. So I'm assuming it's got a resistor on the sync line, haven't tested that yet though.

I originally shorted the TTL jumper on the bypass board and got this issue. Tried opening the TTL jumper too to test 75ohm but still getting sync dropouts on OSSC.

Only other thing I can think of doing is to set Voultars board to 75ohm and remove resistor from scart head? It's the only combination I haven't tested yet.

[marqs]

If I'm understood right, Voultar's board with TTL jumper shorted simply bypasses sync input to output. Since earlier rev SNES include a driver circuit for csync (which properly drives 75ohm loads without additional resistor, btw), I'm wondering where people tap csync on Mini model for amp/bypass boards? If that's directly from PPU, it may not be good enough (combined with the inherent sync jitter) regardless of TTL jumper setting for ossc or other digitizers.

[zeruel85]

For what concerns me, I use borti4938's pcb, with csync taken directly from S-CPUN (Snes Mini), then it is driven (with a voltage divider) into the THS7374, and finally to the scart with a 75 Ohms resistor plus a 330uF tantalum cap. As of today, I haven't had any issues with OSSC + DVDO.

Other notes: I have a retrogaming scart cable without any components on sync line. Voltage divider is 9.53k Ohms in series with a 620 Ohms pull-down resistor.

Hope it helps somebody, guys.

[eric90000]

I think I've cracked this one....just before opening up the SCART cable to remove the resistor etc, I decided to reset all settings on the OSSC and see if even 480p mode worked. It is now holding solid sync in all line modes. I never thought of doing this as all of my other consoles were working fine with the previous settings....I'm not even sure what could have been changed to mess with the sync like that. This was driving me crazy because I had everything correct and it should have been working.

Anyway, if anyone is having trouble with sync it's worth trying a full reset of the OSSC. Thanks for all the help and sorry if this was a waste of peoples time! I feel a bit silly that I didn't try a settings reset earlier.

Current working signal path: SNES mini w/Voultar board TTL shorted > 75ohm attenuated csync SCART cable > gscart_lite w/sync regen OFF > OSSC > Samsung KS7000.

[pyrotek85]

I think I've cracked this one....just before opening up the SCART cable to remove the resistor etc, I decided to reset all settings on the OSSC and see if even 480p mode worked. It is now holding solid sync in all line modes. I never thought of doing this as all of my other consoles were working fine with the previous settings....I'm not even sure what could have been changed to mess with the sync like that. This was driving me crazy because I had everything correct and it should have been working.

Anyway, if anyone is having trouble with sync it's worth trying a full reset of the OSSC. Thanks for all the help and sorry if this was a waste of peoples time! I feel a bit silly that I didn't try a settings reset earlier.

Current working signal path: SNES mini w/Voultar board TTL shorted > 75ohm attenuated csync SCART cable > gscart_lite w/sync regen OFF > OSSC > Samsung KS7000.

I should have mentioned to try that myself, I'm sure I did it through my own testing. Glad you got it working though, the SNES looks beautiful huh?

[eric90000]

I should have mentioned to try that myself, I'm sure I did it through my own testing. Glad you got it working though, the SNES looks beautiful huh?

Oh yeah it's glorious! The Voultar RGB bypass with OSSC Lx5 is the best I've ever seen a SNES look. Scanlines set to 50%, better than any SNES classic mini

[Chocograph]

I really need to connect my snes to my 1440p monitor and see if i can't get a better image than on my 720p tv which only supports 2x.

[lettuce]

Any ideas why im not getting any audio over HDMI when hook the OSSC up to my AV amp?. It works fine through the TV however!

[BuckoA51]

Did you try changing sample rate?

[austin532]

If it works with your tv then it's most likely your AVR.

[DirkSwizzler]

Any ideas why im not getting any audio over HDMI when hook the OSSC up to my AV amp?. It works fine through the TV however!

I had a similar issue with the framemeister rejecting audio just from my AV Famicom in 4x/5x mode. While my PC monitor received the same stream just fine. I *think* I read that switching to 2x fixed it for someone else with a similar issue.

I switched to 2x and was able to bypass the framemeister and can't remember if I tested it first. I definitely have audio now that it's bypassed, but that's not super useful.

[lettuce]

Did you try changing sample rate?

Yeah i tried both options. (48khz and 96khz)

I have the SNES Mini Classic and that works fine when plugged into my AV Amp, so surely the OSSC device would be capable of doing the same?

[Sid]

Had a unit arrive recently. Looks good on my Panasonic plasma, and great on my Sun Microsystems (rebadged Sony) VGA CRT. Unfortunately my Pioneer plasmas reveal an issue that I've yet to read about anywhere. Testing with both a PDP-LX509 and a KRP-500M with scanlines on, 2x mode has massively desaturated colour, and 3x mode has every second line with normal colour, and every other line desaturated. Neither display supports 4x or 5x, so not able to test. Results were the same when testing 240p with both a PS2 and a Genesis. The desaturation is evident from 6% through to 100% scanline strength, with a seemingly linear drop in colour as the percentage value is increased. 480i had normal colour in both "auto" and "manual" scanline modes. With scanlines off the colour is normal.

Thoughts?

[Yohanov]

Here's a curious ignorant question, answer much appreciated.

What'd be the difference between a gamecube (3d) game forced in 240p with rgb+swiss and line doubled with the OSSC (240P X 2) versus native 480p with component?

[DirkSwizzler]

Here's a curious ignorant question, answer much appreciated.

What'd be the difference between a gamecube (3d) game forced in 240p with rgb+swiss and line doubled with the OSSC (240P X 2) versus native 480p with component?

Presumably the game would make use of all the extra available pixels to add detail. Whereas the OSSC is just duplicating pixels to fill the available space.

[bobrocks95]

Here's a curious ignorant question, answer much appreciated.

What'd be the difference between a gamecube (3d) game forced in 240p with rgb+swiss and line doubled with the OSSC (240P X 2) versus native 480p with component?

The difference is you'd be losing half the resolution of your image...

[FBX]

Here's a curious ignorant question, answer much appreciated.

What'd be the difference between a gamecube (3d) game forced in 240p with rgb+swiss and line doubled with the OSSC (240P X 2) versus native 480p with component?

The difference is you'd be losing half the resolution of your image...

LOL yep. It's sort of like asking "What would the difference be between a 1920x1080 movie and a DVD movie upscaled to 1920x1080?"

[austin532]

Did you try changing sample rate?

Yeah i tried both options. (48khz and 96khz)

I have the SNES Mini Classic and that works fine when plugged into my AV Amp, so surely the OSSC device would be capable of doing the same?

Are you using the same HDMI input on the amp as the SNES mini? If not maybe you have the audio set to analog on that HDMI input? Is the TX Mode set to HDMI or DVI on the OSSC?

[lettuce]

Did you try changing sample rate?

Yeah i tried both options. (48khz and 96khz)

I have the SNES Mini Classic and that works fine when plugged into my AV Amp, so surely the OSSC device would be capable of doing the same?

Are you using the same HDMI input on the amp as the SNES mini? If not maybe you have the audio set to analog on that HDMI input? Is the TX Mode set to HDMI or DVI on the OSSC?

Yeah same input on the amp and the TX mode is set to HDMI

[austin532]

That's very odd. Which amp are you using?

[lettuce]

That's very odd. Which amp are you using?

Im using a Pioneer VSX-924

[pyrotek85]

Fudoh, you really do know too much And are correct: UnleashX dashboard is in "1125i 33.70kHz/59.92Hz" so that is solved (and I had 720p and 1080i turned on in the Xbox dashboard - when I turn those off, only leaving 480p on, the dashboard comes up in 4:3).

For Xbox 16:9 games, yes, there's a crapton listed here as being 16:9 natively (and up to 720p/1080i as well) – people can also patch some games which weren't able to be played in 16:9 straight from the developer too:

https://en.wikipedia.org/wiki/List_of_X ... play_modes

BUT, and I could very well be talking out my ass here since I can't find a definitive answer online, but I think these 16:9 (talking about the 480p ones, as the 720p and 1080i would be widescreen right off the bat natively) could be anamorphic widescreen like 480p DVD's were back in the day - and those (if hooked up via component with the Microsoft Xbox AV pack, and on a compatible TV), I think used to send a signal to the TV so it knew it was an anamorphic DVD, and the TV automatically put itself into "wide" mode (or whatever it's called) to unstretch the compressed pixels in that 720x480 video source, and then you would have your 16:9 widescreen display properly. So it would make sense I have to manually put my TV into that wide mode to have it fit-to-screen.

So what would be recommended then if I have a soft-modded xbox and don't want 4:3 480p games stretched to 16:9? Seems like whatever option I select it all comes out as 16:9.

[Dochartaigh]

So what would be recommended then if I have a soft-modded xbox and don't want 4:3 480p games stretched to 16:9? Seems like whatever option I select it all comes out as 16:9.

I just tested my softmodded (with UnleashX) original Xbox. The settings of UnleashX are set to normal (non-16:9/widescreen mode), xbox's video settings are set to normal (non-16:9), and my TV's "screen mode" is set to normal (i.e. NOT "wide" or "stretch" mode or anything like that). Everything is showing up as proper 4:3.

[Blair]

I haven't seen anybody post screenshots with 1080i content so I thought I'd give it a try

OSSC+PlayStation 2 (RGsB)+GSM direct 1080i

(Display:Lacie Electron+E-More HDV M618 DAC)

You know you can hook your PS2 up to that monitor directly, right? LaCie's support sync on green, so you just need a small adapter cable to route a component cable signal to a VGA plug.

Also, 1080i isn't the way to go. 480p or 1024p (which is actually 960p with black bars) is the way to go, since 480 and 960 are multiples of, well, 480. 960i is also a way to go if you have progressive-incompatible games.

yeah, I've actually done it that way before. either directly through a VGA to component cable or using my RGB interface. I've actually had more compatibility issues with 960i than any of the other video modes. although you're right, when it comes to resolution matching that would probably be the first choice if it works over 1080i ( on a CRT anyway). 1080i is also easier for digital displays to work with. I don't think I've seen a flatscreen that works with the 960i mode. another thing to consider, even if I'm using one of my VGA CRTs the PS2 still boots in 480i, I know I can change that but it's just easier for me to have the OSSC take care of little resolution compatibility issues like that.

all that aside, I've been having quite a bit of fun with the OSSC's 480i line 4X mode. it looks beautiful with games that are difficult for GSM, like Virtua fighter 4 (original)

So what would be recommended then if I have a soft-modded xbox and don't want 4:3 480p games stretched to 16:9? Seems like whatever option I select it all comes out as 16:9.

most of the original Xbox library works fine in widescreen, and games that don't support widescreen should still output in 4:3 mode regardless of widescreen settings (the exception being soul caliber 2, with its weird 4:3 720p output setting) any particular games are having problems with? also most of the games that don't have 480p or widescreen modes have patches that rectify those problems (like dark watch)