Original Midway Pac-Man on MAME is best, IMO. It's by definition the most "original, authentic" way to play the game. But if MAME stymies you, or if you're looking for the best version to play on a 480i CRT, I recommend the NES port (either Tengen or Namco, they're functionally identical). It doesn't have accurate colors (what arcade port does with NES's weird palette?), but the arcade action is 100% there.

@barbudreadmon thanks, no worries. Don't know anything about code, just wanted to know if it had alreayd been done cos Crazy otto is really well known and I like DK2600.

Thanks for the advice guys, but turns out I have to press ctrl+\ not ctrl+' for tilda Thank you.

It really needs to be a permanent feature

@Haemogoblin said in RetroPie is v4.1 RPI2b advice: I'm just looking in to how to direct Retropie to use one single rom directory for both emulators. The /home/pi/RetroPie/roms/arcade/ directory was made for this use case. And then you have to define what arcade emulator to use when launching a game in runcommand menu (you just need to set this once). edit: this post seems to have some useful info for you: https://retropie.org.uk/forum/topic/5674/solved-rom-version-numbers-to-match-emulators