Originally Posted by
Ed Oscuro
And in turn, almost every CRT monitor (that is going to be widely available these days) uses the 31KHz scan rate (for higher resolutions), and is basically incompatible with the 15KHz of (most) old arcade tubes and televisions for classic consoles.
There are a variety of attempts to bridge the gap, some more successful than others.
The best approach towards preserving an arcade look without original game software and hardware would be to use a kind of 31KHz to 15KHz device and drivers to send the emulated images to an arcade monitor, like the Ultimarc (or similar; I don't know which ones are "best").
Another might be to try to find a MultiSync-style kind of PC VGA CRT monitor that accepts a low resolution image, and just use special drivers or settings to output low resolution from the emulator. Some emulators should support the right timings, although the one I fuzzily remember reading about recently had some lag tradeoffs.
Another approach would be something like HLSL or at least custom scanline masks. These look pretty good although HLSL seems to work very good on an LCD to give the illusion you are looking at an actual arcade monitor.