Sega Genesis 1 RGB to VGA Options/Issues ( Pics !! )

[Druid II]

Well I only did that on the Saturn so I wouldn't know.

[The Moe]

Hsync is open drain, Vsync is probably open drain too, so you need a bit of extra magic for it to work.
When you stress Hsync you'll mess up VDP operation aswell

OK... so, in English.. What exactly do I need to do to get this setup working... heres what I have:

1. Sega Genesis Model 1 ( Several units )
2. CGA EGA etc. to VGA Scaler board.
3. Modern LCD monitors/TVs.
4. Soldering and access to electronics.



Please, if you or anyone here knows a working setup/diagram, instructions I would dearly appreciated it.

P.S. I am not lazy here The reason I am requesting it like that is because I have researched and researched forever and already made every possible combination of wiring I can find/think of without much luck... The scaler and the MD/genesis are working I have tested just not working together for some reason ...

Help !!

[Lum]

You probably won't be able to do that. RGB from Genesis doesn't follow CGA or EGA specifications.

Even if the resolution is supported, your idea would still require a sync splitter. Geneis outputs sync together on one line. CGA/EGA/VGA however use separate pins for horizontal and vertical sync.

[Bad_Ad84]

What hes posted is tried and tested. It will work fine.

Guide is here:

http://www.mmmonkey.co.uk/console/other/rgb2vga.htm


You just need a console that outputs RGB, which you have.

[The Moe]

What hes posted is tried and tested. It will work fine.

Guide is here:

http://www.mmmonkey.co.uk/console/other/rgb2vga.htm


You just need a console that outputs RGB, which you have.

Your link was the most helpful since I got it last year :) ... That site is nicely put together and it addesses my issue directly.
My only problem is a slight confusion on the synce stripper circuit... for some reason I can't really follow though the wiring with confidence. I wished there was a picture of the circuit board traces and connections from below... Or maybe a schetch showing the RGB Gr and S out of the DIN port and into the board and then the output to the scaler.

Any idea or source for such diagram ?

Thanks again !

[Bad_Ad84]

I pointed you to that link last year. Check post #3

:)

I have that same board. Its probably because you have not sorted the sync out.

There is a guide on mmmonkey.co.uk that covers what you need. Look in top right of web page. Im not at a pc right now, so can't directly link you

Cant help you with the wiring... the diagram is pretty simple. If you have any specific parts you are stuck on, just say which pin you are stuck on and I will let you know where its supposed to go.

[jake74]

You may need to get into the CVGA board menu options and change output settings.

I have a CVGA and Sync Strike, which works really well with my Multi-Mega and 38" Samsung. At first it didn't show anything on the screen, because my Samsung wasn't accepting the input range. I can't remember exactly what, I think I had to change the output from 640x480 to 320x240 or something?

Anyway, looks ace when done! http://megadrive.me/2011/12/11/scanlines/