VGA to RGB

[bacteria]

I have one of these screens:



Clearly the PC-RGB is VGA for computer input; so will use H-Sync and V-Sync. Makes it fine for running off a PC or DreamCast I guess, but i'm after standard RGB we tap off regular consoles; so RGB plus C-Sync

Anyone know a cheap and easy way to convert PC VGA into standard RGB?

[elmagicochrisg]

Anyone know a cheap and easy way to convert PC VGA into standard RGB?

Don't you mean the other way around?...

Standard RGB output (e.g. SNES SCART RGB) converted to PC VGA.

[jeffro11]

Your post is hard to understand but... Just combine the H and V and you get Csync. If you need H and V separated buy an LM1881 IC and it will separate the syncs for you.

To get the combined. You just need to use a 74LS86. Resistor and cap to ground on both H and V going into the chip. Your output will be on pin 11...

[bacteria]

Don't you mean the other way around?...

Standard RGB output (e.g. SNES SCART RGB) converted to PC VGA.

Yes, you're right, I do.

If I connected a C-Sync (or composite as that's an alternative to C-Sync) to the V-Sync and also H-Sync lines, would that work or do I need the LM1881?

[jeffro11]

You will need the LM1881. The timings are different for V and H.

[bacteria]

Thanks for the advice, i'll try one out.

[elmagicochrisg]

Have a look at this:

http://shmups.system11.org/viewtopic.php?f=6&t=35423