Very cool. Now I just need to stop making AttractMode themes long enough to do a compile.
I just installed pixel rasbian, ran raspi-update, downloaded the retropie script, installed advmame 3 (with advmess) along with attract mode, tweaked the advmame .rc file to make video and keyboard SDL, realized AM wasn't automagically configured properly and just made sure sdtv=16 in config.text
rebooted to command prompt
navigated to the advmame install folder and ran a ROM.
I did copy some roms to the roms folder also.
advmame is running at 320x240 but ghost n goblins is 256 by 224 i think so if it's pixel to pixel mapping it makes sense the game shows up in the middle of the TV screen and a little small.
In the pics i did have to use fractional scaling to fill the screen better and i really couldn't see a difference in pic quality.
I want to try this on an old crappy curved 19" crt i have buried in the basement.
The curved screens have a mask pattern that looks more like an arcade monitor.
But, the fact the screen isn't flickering is huge.
I think console emulators will work better as they had standard resolutions.