HELP/INFO NEEDED: Mirror Cab, Software, and Hardware Info

[Necro]

So, since I'm quickly becoming an expert in mirror MAME/emu cab design, I figured I'd start a FAQ thread on it here.

If you know of any emulators, front ends, hardware, odd setups, drivers, forks, etc., that may support a mirrored setup (i.e., they reflect video output on either the horizontal or vertical axis) PLEASE let me know so I can incorporate it. 

Once something substantial has been compiled, I'll migrate it over to the Wiki. 

Thanks in advance for any help anyone can provide!

[SavannahLion]

I just made a mental note back when, but Linux supports mirroring from the getgo. The easiest is from within the GUI, but I don't recall if I was running KDE or Gnome. Most likely KDE as that's my preference. Not that it matters much. If you want to torture yourself, it should be configurable all the way down to the config file, probably by reversing the X/Y voltages (maybe) or using XRANDR/RAND to do it.

[Necro]

That is actually a really good point I'll add in.  Linux supports xrandr flipping.  I can't use it because my video card isn't supported, but it IS an option.   I'll clarify in the FAQ that it's solely for Windows setups since thats what I'm using (and most emus seem to be available on). 

However, I think that may beget another FAQ on using Linux as an OS for a cab.  That I will not be tackling.

So, few 'challenges' if people want to take them up that I'd like to add:
- Circuit diagram to 'flip' rgb output.  (However you would do that by screwing up the sync or whatever...I have NO idea).
- 'Benchmark' an emulator that improves speed on MAME comparing the NVKeystone flipped out vs. non-flipped vs. Mame Flipped.
- Find the code in MAME that's used for flipping output.  I'll take care of the emailing/asking for it's including in any other arcade emu worth using now.