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HDMI to Old CRT
abstract3000:
Thank you so much for giving me the link to that .206 Version!
So as for the Sharp 27R-S100 Set that project I suppose is officially dead. :/ After grabbing the photos for you the other day and shutting everything down that was the last time That Set ever turned on. When I came out the next day to try MAME, the Set would no longer even power up, I checked all the solder points, tops of Caps, fuse etc. and have no idea. I txt'd my friend to ask him what his thoughts were and no Response, he is at the end of his rope with the TV and rightfully so.
I went out and purchased a Panasonic CT-27D11E, which has both S-Video and Component YPbPr Inputs, I bought a $15 S-Video Video card to fall back on. Though I am no longer interested in this RGB Mux mod stuff, It sounds awesome but between paying for the mods done on the last TV and buying the New TV I'm out $525 and nothing to show for it (back to square 1) Where i could have just simply purchased a $15 S-Video GPU, and had it running like it used to. So a bit bitter about the entire thing honestly and feeling defeated, just want a working monitor, and finding the Panasonic set was a diamond in the rough and required a bit of a drive. The other option was another of the Same set and an 8 hour round trip.
I do however greatly appreciate all the time and effort everyone has lent in helping me on this tragic journey :)
It seems though that you can use CRT_Emudriver with a transcoder to then filter to YPbPr and get great results, though I think you again need a transcoder. There is this one on eBay that states it handles 240p - 1080i
https://www.ebay.com/itm/174166352619
If thats the case, then I will just get that and call it a day, otherwise I might just plug S-Video back in to finally put a close on the project.
Zebidee:
--- Quote from: abstract3000 on November 17, 2023, 07:15:08 pm ---Thank you so much for giving me the link to that .206 Version!
--- End quote ---
No worries
--- Quote ---So as for the Sharp 27R-S100 Set that project I suppose is officially dead. :/
--- End quote ---
:'(
--- Quote ---I went out and purchased a Panasonic CT-27D11E, which has both S-Video and Component YPbPr Inputs,...
It seems though that you can use CRT_Emudriver with a transcoder to then filter to YPbPr and get great results, though I think you again need a transcoder.
--- End quote ---
You can get fantastic YPbPr results with a transcoder, which is exactly what my GreenAntz VGA->component transcoders do. Just now, I've been running two cabs side-by-side, one with a component-modded generic 21" TV + GreenAntz and the other with an RGB/SCART Panasonic 28" TV. The CRT_emulator setup in both is identical in each, no special setup required. In most cases I honestly can't tell the difference between YPbPr and RGB.
Sorry for hoisting my own flag, I'm between revisions on GreenAntz ATM so I couldn't sell you one right now anyway. Hopefully I'll have some to go before Christmas. However, if you can get one of JAM's quite decent wakabavideo ones, grab it because most of the time he's sold out too.
abstract3000:
--- Quote from: Zebidee on November 18, 2023, 03:50:55 am ---
You can get fantastic YPbPr results with a transcoder, which is exactly what my GreenAntz VGA->component transcoders do. Just now, I've been running two cabs side-by-side, one with a component-modded generic 21" TV + GreenAntz and the other with an RGB/SCART Panasonic 28" TV. The CRT_emulator setup in both is identical in each, no special setup required. In most cases I honestly can't tell the difference between YPbPr and RGB.
--- End quote ---
After doing allot of reading over the last couple months on this, I had kind of gotten the idea that had i not had the S-Video but rather YPbPr Component, I would have been allot better off to begin with and never would have went through all this. I saw several screen shots of people using Transcoders to Component, and honestly I don't care of RGB is somehow better I don't even think I would have been able to figure it out and see up that closely. I never had an issue with the S-Video to begin with but these are the tolerance differences we are looking at here:
SVIDEO VS RGB
I Could go confront my friend on the dead CRT, but i feel even if he did manage to get it resurrected, we would be back to fine tuning that thing and hoping we could work through most of the obvious issues, always wondering in the back of my head when would it go dead. I know he has done allot and is tired of working on it, just as tired as I am hauling it back and forth and discussing it with him so I let the sleeping dog rest and figured learn from my mistake. It's almost meant to be with this new CT-27D11E, I Set my search radius a few hundred miles, I figured I'm on Vacation and have time to drive. Only 1 CRT I could find that matched the specifications 27", Curved Screen, YPbPr inputs. Crazy how scarce these are getting, but the guy was willing to negotiate and not as far as I expected.
So I went ahead and bought 2 Transcoders I bought this Cheap Chinese one off of Amazon because it will arrive tomorrow and I can continue to play with it while on vacation:
I read several reddit posts, a write up on the Shmups board on it, and watched a Video Review looking at the comments sections with several confirmations that running from PC with CRT Emudriver to Component worked great. I also spent the $80 (cringe) on wakabavideo's Transcoder but that wont get here till later next month i suspect coming all the way over from NZ. I saw it up for sale yesterday with 5 remaining for 530 originally available, when I logged in this morning 1 left. Figured it must be a good one, and will most likely last allot longer than the chinese one, but the amazon special will get me by to get everything setup.
Though once again I really appreciate all the help from you over the last couple months on the Sharp TV :) I will post some pictures when i get everything setup.
Zebidee:
Don't give up on the Sharp TV, though may be wise to take a break from it. Hopefully it is a simple problem.
SVideo quality is quite OK, but for your mame setup will still look mediocre. The bigger issue is the video card will be outputting in a squished & interlaced video mode, either 640x480i or NTSC 60hz. You won't get any benefits from running games in original pixel-perfect video modes.
You'll have noticed the SCART input on the Chinese units - this is because they don't do anything to combine the separate H+V sync to composite. You have to do that yourself.
Those cheap Chinese ones ripped off an early GreenAntz design I published 5 years ago, on another forum. A mate published his version on Github. Chinese ones didn't exist until about 9-12 months afterwards. Some version of my design and now you buy them on Amazon & Aliexpress. Since publishing, I (and my mate) solved the sync and various other improvements. So, that is why the cheap Chinese ones don't do the sync. I also why, even though I believe in principles of open source sharing cooperation yada yada, I don't publish designs anymore.
With the China ones, you'll need to make or hack (or buy) a VGA-SCART cable. You'll also have to combine the sync somehow. Simplest way is to twist H+V together and run that in to SCART pin 20 through a 1K resistor. This is not perfect but probably sufficient for most TVs, though some may have trouble locking on and many will show artifacts, like a zig-zag at top of screen.
[EDIT] You can get decent composite sync via the CRT_emulator/VMMaker option. You will still need the resistor.
You don't have to worry about all that with a GreenAntz unit - just setup CRT_emulator and plug it in. Comes supplied with 4 standard PCB offset legs, making it super-easy to install in cabs (just screw it down!).
abstract3000:
Well, the SHARP TV is up and running again, messed with it today and got it going. The picture is back up, tested with Games and my suspicions were right, the interlacing issue goes away and the games seem to display just fine. Though offset a bit which stated could be fixed with adjusting the horizontal and vertical porch settings though this brings up 2 new things today, I need to think about.
(though before that, yes I did order the resistors, though when I spend some time with the multimeter tomorrow on my friends mod I have a feeling I'm going to find a resistor on the synch as he is pretty wise individual, but If not I will add it.)
1st issue. I am convinced something is up with the EDID Emulation when sending the signal through, what you are calling the offset is identical on the monitor and the TV, what has me convinced of this is with the new Chinese adapter I got today I hooked that up to the Panasonic ran the signal through and it displays just fine but the image is offset identical on that one as to the monitor and the other CRT and even more to a degree. Why do I believe this offset is an issue? Well in the first images I showed early on getting the signal through the TV displayed the entire image of the desktop with the Task bar fully visible. So I'm guess with all my playing around with Arcade OSD and CRT_Emulator I messed something up. I get that the EDID emulation isn't the "important" part but you don't get a signal unless its turned on.
2nd issue is with colors, maybe you might have an idea what it means, I discovered today with the SHARP that the Green shows sometimes for some things but is missing in allot of other things and I almost believe if this issue is fixed that would be the end of most everything
Here is an example of Paperboy on the SHARP CRT
Now here's an image of Paperboy on the Panasonic CRT
In your expert opinion what does that mean? Or What would be the root cause of that?
You mentioned to go checkout the RGB cuttoffs, I got the service manual and studied it a bit, and found out how to get into the service menu. Here in the service menu I have these particular options:
I highlighted the most obvious, but which one of those would be the cutoffs?
oh and here is an image from the Panasonic connected to the cheap Chinese adapter, this is out of the box no adjustments, as well Groovymame has not been configured with CRT_Emudriver either, I think the colors look really good actually.
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