digital to analog video converter dvi to s video

They are considered 'CGA' monitors, but that is a very loose term. I want to drive an arcade monitor, not NTSC or PAL (or SECAM). If this can be done with GPIO, then it is somewhat likely that I'll be able to simply work up a software solution, but if an LVDS -> Analog RGB device is required, I'd love help on choosing the proper device. I honestly don't plan to implement anytime soon, I'm still at the beginnings of research, but this is a topic I want to learn more about. Some guidance on where to start reading would be most welcome.

I haven't the equipment to measure this properly from my own hardware. Arcade monitors have a hsync of 15kHz, and the RGB signals are (I think) 0-2v or 0-5v depending on the monitor, though most can handle either. Maybe GPIO alone is enough to do this, I don't know. I know enough to combine and invert the sync if necessary for whatever monitor I wind up implementing on. I need to output R + G + B + HSync + VSync. I work with many EEs who could likely assist as well, and while none of them have any interest in arcade stuff, if I come to them with a specific implementation issue they've said they would find it hard to resist helping. I have patience and skill enough to muddle my way through implementation if I ever find the device I'm looking for, I'm sure. If I need a chip/board, I don't know enough to know what specs I need to look for. The problem though is that I don't know what I'm looking for as far as LVDS->Analog RGB goes, or even if I need to use LVDS. It won't be something I sell or give away, just for my own amusement after the challenge of getting it running. I hope to develop an embedded arcade emulation system for my own purposes. Many of you will already know exactly what I'm after from that single sentence. I've been daydreaming lately about using an embedded Linux board (or something) with native LVDS output that can drive an arcade monitor.

Digital to analog video converter dvi to s video