YPbPr for mega drive/genesis

Strider77 · Post by **Strider77** » Sat Sep 16, 2006 10:41 pm

Is it possible to get YPbPr from a genesis one way or another?

PC Engine Fan X! · Post by **PC Engine Fan X!** » Sat Sep 16, 2006 11:13 pm

Strider77 wrote:Is it possible to get YPbPr from a genesis one way or another?

You mean like extract "Component Video" output from a Mega Drive/Genesis console?

The Sega Genesis 3 console has the best decoder chip and can easily output true RGB signal for use with XRGB upscan convertor or a true low-resolution analog RGB monitor. One would have to get an expensive transcoder and convert RGB signal to output as component video -- which is pretty crazy idea (sure, some Superguns have special transcoders to do such output conversion process).

PC Engine Fan X! ^_~

Strider77 · Post by **Strider77** » Sun Sep 17, 2006 5:18 am

the reason i want to do this is b/c i use a HDTV not a monitor...

I need to get a transcoder any way to get progressive out of my dreamcast.

Michaelm · Post by **Michaelm** » Sun Sep 17, 2006 11:30 am

I've just bought a scartrouter which trancodes RGB signals to YUV.
I've attached my MD through scart and the image I got on my yuv monitor was pretty good. It was 240p.
Unfortunatly I have to send it back because the leds light on the front of the machine don't work.
But I was really impressed with the quality of the image on my widescreen LCD monitor.

The scartrouter seems to go under a lot of different names but the one I bought was the Orbit Scartrouter 2001.

Here's a link to the dutch shop I bought it from:

https://www.satshop.nl/catalog/product_ ... cts_id=117

Specineff · Post by **Specineff** » Sun Sep 17, 2006 5:59 pm

http://www.jrok.com/hardware/RGBv4/index.html

neorichieb1971 · Post by **neorichieb1971** » Mon Sep 18, 2006 12:00 am

I've done it with a transcoder, results are good.

I wouldn't buy a JROK PCB unless your only using it for one specific console. I have an external unit which uses SCART leads from Europe. That way if I buy a Neo geo, a SNES or whatever, I just need the SCART lead.

I mean if you want to buy a JROK for every retro console you buy you might as well get an XRGB. It will be cheaper.

iatneH · Post by **iatneH** » Mon Sep 18, 2006 2:39 am

Oh my God, when do those new JROKs go on sale?? I want one!

I don't understand though, what's to prevent you from using the JROK as an external module? I made one which I am using for my supergun and other consoles.

edit: Holy crap, available already? Gotta get one next paycheque!

neorichieb1971 · Post by **neorichieb1971** » Mon Sep 18, 2006 3:03 am

If you use it externally you would need to build a box, you would still need to extract the RGB lines from the AV outputs. And external units cost about the same anyways, maybe $20 more.

They don't do progressive output either, that would require upscanning.

SAM · Post by **SAM** » Mon Sep 18, 2006 3:20 am

The old JORK unit shouldn't be able to do the task.

I don't know whether the new one could.

But I do know that you need a transcoder built around a LMH1251 chips.

Useful Chip (LMH1251)
http://nfggames.com/forum/index.php?showtopic=1739

The chip's data sheet said it could convert VGA to Progressive Scan YPbPr.

shmups.system11.org

YPbPr for mega drive/genesis

YPbPr for mega drive/genesis

It would be more like RGB from mega drive/genesis...