OSSC Pro

[marqs]

Firmware v0.71 is released. It fixes some of the issues reported here

* fix audio source selection with HDMI RX
* fix size/position adjustment vertical limit
* add support for defining profile names via text file
* improve 1080p120 compatibility

[marqs]

Has anyone else had a small issue with Mega Drive at 60hz? In 1080p output/scaler mode, I get fairly heavy shimmering at auto/default settings, and in Interger (overscan) mode with the correct timings etc I get a perfect image but with misaligned scanlines. 120hz output seems to upset things further. All my other 240p sources have worked perfectly. It's a Japanese Mega Drive running at 59.92hz.

Misaligned scanlines when using MD 256/320col preset? What is the reported auto V interval under Scanlines -> Custom sl?

[Das Muel]

I get (Auto) 5 under V (and H) interval. It's a strange one. I get the scanlines you can see in the picture - if I switch between "top" and "bottom" it corrects itself temporarily, but slips back into it at resolution changes/power cycles etc. If I try to use one of the 120hz modes with the same settings, I get a narrow aspect ratio that I can't seem to correct, but an otherwise lovely image.

Could my Mega Drive be off spec somehow? It's a Japanese model 1 and the OSSC reports the standard 59.92hz. I did region mod it but I almost always use it in its default mode. I haven't had issues with it before apart from the very occasional sync drop.

The image is fantastic. Really sharp as a tack and all my other 240p sources have been perfect.

[marqs]

I get (Auto) 5 under V (and H) interval. It's a strange one. I get the scanlines you can see in the picture - if I switch between "top" and "bottom" it corrects itself temporarily, but slips back into it at resolution changes/power cycles etc. If I try to use one of the 120hz modes with the same settings, I get a narrow aspect ratio that I can't seem to correct, but an otherwise lovely image.

Could my Mega Drive be off spec somehow? It's a Japanese model 1 and the OSSC reports the standard 59.92hz. I did region mod it but I almost always use it in its default mode. I haven't had issues with it before apart from the very occasional sync drop.

Besides this minor issue, the image is fantastic. Really sharp as a tack and all my other 240p sources have been perfect.

I suppose you mean that overlay does not cover 50% of each source line which is not possible at 5x vertical scale. You can use custom scanlines to set 2 first lines to target intensity and 3rd one to half of that for a result which looks closer to 50% overlay.

[marqs]

AV DAC expansion board is now updated to version 1.1. Comments on schematic & layout are welcome.

[tongshadow]

I get (Auto) 5 under V (and H) interval. It's a strange one. I get the scanlines you can see in the picture - if I switch between "top" and "bottom" it corrects itself temporarily, but slips back into it at resolution changes/power cycles etc. If I try to use one of the 120hz modes with the same settings, I get a narrow aspect ratio that I can't seem to correct, but an otherwise lovely image.

You can only get perfectly spaced scanlines if the result of "vertical resolution" divided by "240p" is an even number.
480p/240p = 2 (1 scanlines, 1 blanked line)
720p/240p = 3 (2 scanlines, 1 blanked line)
960p/240p = 4
1200p (letterboxed 1080p)/240p = 5
1440p/240p = 6
2160p/240p = 9 (not perfect)
2400p (letterboxed 2160p)/240p = 10

[Das Muel]

Thanks. Perhaps I had in mind the Retrotink 5X's 4.5 scale that I was using until fairly recently. I'm a little bummed that my Panasonic OLED doesn't support 1440p, but I do have an Extron 1804 which does - the 4k output from this looks fantastic (at the cost of lag and a rather untidy chain of course).

[GK6475]

Any updates on when the OSSC Pro will be back in stock?

[jaffa225man]

Any updates on when the OSSC Pro will be back in stock?

It doesn't seem likely there's been an update because only half a month has passed since this last estimate was posted:

viewtopic.php?p=1540903#p1540903

My best estimate is 1.5-2.5 months.

[marus]

Does the OSSC Pro support applying 240p-style CRT screen filters and scanlines to 480p and 720p sources? I'm thinking about "sidegrading" from the Retrotink 5x to the OSSC Pro, but I really like using the Retrotink's pre-scale functionality to apply CRT masks to the Xbox 360 CAVE ports, and it'd be a shame to lose that.

[marqs]

Any updates on when the OSSC Pro will be back in stock?

It doesn't seem likely there's been an update because only half a month has passed since this last estimate was posted:

viewtopic.php?p=1540903#p1540903

My best estimate is 1.5-2.5 months.

Next batch of boards is scheduled to be assembled in January, but OLED display and case lead times are likely to push restock to February.

Does the OSSC Pro support applying 240p-style CRT screen filters and scanlines to 480p and 720p sources? I'm thinking about "sidegrading" from the Retrotink 5x to the OSSC Pro, but I really like using the Retrotink's pre-scale functionality to apply CRT masks to the Xbox 360 CAVE ports, and it'd be a shame to lose that.

Currently not supported but it's a possibiliy in future.

[marus]

Currently not supported but it's a possibiliy in future.

Thanks for the response! That's a shame to hear - CRT emulation has become a killer feature for me, so I'll have to hold off on purchasing one for now. I'm sure you have a bunch of other stuff you're working on too, but hopefully that's something you can add in the future.

[kitty666cats]

AV DAC expansion board is now updated to version 1.1. Comments on schematic & layout are welcome.

Just for curiosity’s sake, do you use an ADV7123 on the analog out board? I’ve been having some fun lookin’ up DAC chipsets & had a feeling Mike Chi used one of those on his RetroTink Ultimate Pi GPIO hat - looked through some images of the board and confirmed my guess. I think I was reading about something else that uses one recently, as well, but I can’t remember for the life of me…

[LDigital]

Currently not supported but it's a possibiliy in future.

Thanks for the response! That's a shame to hear - CRT emulation has become a killer feature for me, so I'll have to hold off on purchasing one for now. I'm sure you have a bunch of other stuff you're working on too, but hopefully that's something you can add in the future.

Hold on, yes you can with custom scanlines. I’m using it with switch and have a custom scanline set that is perfect. I’m playing pixel art games with perfect scanlines every day since I got it including all the switch cave shooters.
It’s incredible and the scanline function is really powerful.

That being said a 240p style mode without having to use a custom would be nice

[marqs]

I get (Auto) 5 under V (and H) interval. It's a strange one. I get the scanlines you can see in the picture - if I switch between "top" and "bottom" it corrects itself temporarily, but slips back into it at resolution changes/power cycles etc. If I try to use one of the 120hz modes with the same settings, I get a narrow aspect ratio that I can't seem to correct, but an otherwise lovely image.

Regarding the narrow aspect ratio in 1080p120 mode, I assume you use CEA PR2x preset? In that case integer scale needs to multiply 320x240 into 960x1080 window (horizontally duplicated to 1920x1080 in transmitter chip) which results to narrow 2x horizontal scale in overscan mode since 2.5x is not possible. I could add CEA preset without PR2x for TVs not supporting CVT-RB but it'd require 10% higher pixel clock, thus leading into more silicon lottery.

Just for curiosity’s sake, do you use an ADV7123 on the analog out board?

It uses ADV7125 which seems to be same as ADV7123 but with 8bpc.

Hold on, yes you can with custom scanlines. I’m using it with switch and have a custom scanline set that is perfect. I’m playing pixel art games with perfect scanlines every day since I got it including all the switch cave shooters.
It’s incredible and the scanline function is really powerful.

I understood the question was more about being able to drop every other or 2 out of 3 lines and process resulting image as it was 240p.

Also forgot to mention that the next batch will be made with black cases, and those will be also available to buy for current owners.

[Das Muel]

I get (Auto) 5 under V (and H) interval. It's a strange one. I get the scanlines you can see in the picture - if I switch between "top" and "bottom" it corrects itself temporarily, but slips back into it at resolution changes/power cycles etc. If I try to use one of the 120hz modes with the same settings, I get a narrow aspect ratio that I can't seem to correct, but an otherwise lovely image.

Regarding the narrow aspect ratio in 1080p120 mode, I assume you use CEA PR2x preset? In that case integer scale needs to multiply 320x240 into 960x1080 window (horizontally duplicated to 1920x1080 in transmitter chip) which results to narrow 2x horizontal scale in overscan mode since 2.5x is not possible. I could add CEA preset without PR2x for TVs not supporting CVT-RB but it'd require 10% higher pixel clock, thus leading into more silicon lottery.

Ah okay. Yes I do have to use the CEA PR2x preset with my TV - I suspected it might have something to do with that. OK great - I'd like to take a chance on that CEA preset if that's a possibility?
On a side note, I am really enjoying the 1440p output since pairing it with my Extron 1804. The CRT filters really look great at this res. If I use them with the Dreamcast I can mimic the look of a PC CRT very closely indeed. I've never been a fan of using the Wii's component input on a flat panel until now - it looks very clean and sharp with the Pro, relatively speaking. Reminds me of the days when I used to play Mario Galaxy on a PC CRT with a transcoder way back when. Great device.

[marus]

Hold on, yes you can with custom scanlines. I’m using it with switch and have a custom scanline set that is perfect. I’m playing pixel art games with perfect scanlines every day since I got it including all the switch cave shooters.
It’s incredible and the scanline function is really powerful.

I understood the question was more about being able to drop every other or 2 out of 3 lines and process resulting image as it was 240p.

Yeah I'm talking about dropping lines so you can process a 480p or 720p image as though it was 240p - although if you can configure custom filters to achieve the same visual effect then that would be good enough. Can the shadow masks also be configured? I imagine it'd be easy enough to line up scanlines correctly as long as the source image is integer scaled, but I'm not sure if the same is true for shadow masks.

[marqs]

Firmware version 0.72 has been released:

* fix GBI presets
* store size/position adjustments for HDMI inputs as well
* add 2880x2160_60 preset option
* enable 2880x2160 mode for 240p/288p A-LM
* support direct video "DV1" mode from Mister and PixelFX products
* sync processing fixes for Taito F3 etc.

It's also worth noting that 1080p120 preset (moved under output menu) now has CEA timing option without PR2x, possibly making it more compatible with displays not supporting CVT-RB timings.

First set of preassembled extra AV output expansion cards has also arrived. A production batch is ordered soon when final tests have been completed. Focus will now move on to finalizing legacy AV input card which will support CVBS, s-video and (if all goes well) RF.

[Das Muel]

Firmware version 0.72 has been released:

* fix GBI presets
* store size/position adjustments for HDMI inputs as well
* add 2880x2160_60 preset option
* enable 2880x2160 mode for 240p/288p A-LM
* support direct video "DV1" mode from Mister and PixelFX products
* sync processing fixes for Taito F3 etc.

It's also worth noting that 1080p120 preset (moved under output menu) now has CEA timing option without PR2x, possibly making it more compatible with displays not supporting CVT-RB timings.

First set of preassembled extra AV output expansion cards has also arrived. A production batch is ordered soon when final tests have been completed. Focus will now move on to finalizing legacy AV input card which will support CVBS, s-video and (if all goes well) RF.

That's great, Marqs. Looking forward to giving it a whirl later tonight, particularly the CEA timing option. Thanks for your hard work.

[LDigital]

It doesn't require any special metadata, it just looks for the DAC's EDID. You just need to send that EDID to the Super Nt/Mega Sg and they'll switch to DAC mode. Note that the DAC has a physical switch for NTSC or PAL and this changes the EDID. I'm not sure where the rumours about pixel encryption or special packets came from because neither exists.

PMing you about this

[jaffa225man]

Firmware version 0.72 has been released:

* fix GBI presets
* store size/position adjustments for HDMI inputs as well
* add 2880x2160_60 preset option
* enable 2880x2160 mode for 240p/288p A-LM
* support direct video "DV1" mode from Mister and PixelFX products
* sync processing fixes for Taito F3 etc.

It's also worth noting that 1080p120 preset (moved under output menu) now has CEA timing option without PR2x, possibly making it more compatible with displays not supporting CVT-RB timings.

Thanks! It's great to see developments underway that will even better support my devices (GBI presets, HDMI input adjustments stored, and possibly also MiSTer direct video support, although I have its analog IO board v6.1 too)!

First set of preassembled extra AV output expansion cards has also arrived. A production batch is ordered soon when final tests have been completed. Focus will now move on to finalizing legacy AV input card which will support CVBS, s-video and (if all goes well) RF.

I'm excited for the legacy AV input card too, of course, and it's wonderful that you're trying to add RF to it! Good luck!

[defected78]

Anyone know where these can be bought?

Seems to not be available at VGP

[fernan1234]

Probably only VPG will have them for a while. Don't expect a re-stock until some point after Chinese new year.

I'll be getting one of these when there's a bundle including the AV output card.

[Paranoid_Andy]

I'm not entirely sure from reading the OSSC Pro wiki so figured I'd just ask.

Do anybody know if the Pro can do Line 4x (256x240 optimal)(1280x960) @ 120Hz + BFI? Or if it can do Line 4x @ 120Hz + BFI in general?

Similar to others as well, any updates on when the next batch will be available?

Hope you all are doing well!

[marqs]

I'm not entirely sure from reading the OSSC Pro wiki so figured I'd just ask.

Do anybody know if the Pro can do Line 4x (256x240 optimal)(1280x960) @ 120Hz + BFI? Or if it can do Line 4x @ 120Hz + BFI in general?

Similar to others as well, any updates on when the next batch will be available?

Hope you all are doing well!

The hardware is capable of 1920x1080@120Hz output so any lower res mode @120Hz is possible as well. Currently there is no SCL output preset for 1280x960, though, but it could be added under CRT group (I'm not aware of any DFP with 1280x960 native resolution).

Next batch of boards should be available in a couple weeks.

[Paranoid_Andy]

Thanks @marqs! That's exciting news. I'm hoping to get one finally.

As for 960p @ 120Hz, my LGC1 does great at Line 4x 256 optimal and I absolutely love the image quality and I have used it for all my 240p consoles. I think it's painting 960p on a 1080p frame? So the idea of being able to do Line 4x @ 120Hz is one of the main reasons why I want to buy a Pro. So yes, if a preset for 1280x960 could be added I would definitely use it!

[marqs]

at at Line 4x 256 optimal and I absolutely love the image quality and I have used it for all my 240p consoles. I think it's painting 960p on a 1080p frame? So the idea of being able to do Line 4x @ 120Hz is one of the main reasons why I want to buy a Pro. So yes, if a preset for 1280x960 could be added I would definitely use it!

I think it'll be better with 1920x1080@120Hz preset and integer scale option. That way you don't need to worry about the TV doing stupid things like forcing invalid aspect ratio, adding latency etc.

[Paranoid_Andy]

When I run 960p @ 60Hz I don't get any additional lag at all in my tests and it scales it really well so I'm very happy with the image quality. I've been using 4x for years like that which is why I'm very interested in being able to use it on the Pro. It looks so sharp and clean that when I compare it to a 4K scaled image I would say it's only a 2-3% difference in quality. In my opinion.

Are you thinking @ 120Hz it would change the image quality?

I'm certainly not trying to be stubborn, it's just that because I've been using 4x for so long and it's my favorite scale to use I would very much prefer to keep using it and that's literally the main reason why I want to buy a Pro. I still want a Pro for other reasons, just 960p is THAT important to me lol. I hope this is understandable.

[Guspaz]

Not to divert this from the OSSC Pro, but the reason your RT4K isn't working at 960p120 on your TV has nothing to do with the RT4K, it has to do with the TV, and the OSSC Pro is going to get the exact same result as the RT4K: an invalid format error from the TV.

If you're scaling 240p, then you should be using 1440p120 anyway. It's still an even multiple of both 240p and 480p, and is a far more standard video resolution that the TV supports. Both your RT4K and LG C1 support it.

[Paranoid_Andy]

Hey Guspaz.

Not trying to say you're wrong here. I'm certain my ignorance on the topic is coming in to play here. But I am confused, because my TV accepts the OSSC at 960p@60Hz and also accepts my PC at 'true' 960p@120Hz so I guess I'm not seeing how my TV is the issue? If it accepts my PC at 'true' 960p@120Hz shouldn't it stand to reason that the OSSC Pro could do the same thing or am I missing something?

I'm genuinely not trying to be pushy about this and I appreciate the recommendations of other resolutions. I just really really realllly like 960p a lot on the OSSC and I would love to have it in 120Hz if it's possible.