Cool, thank you for this! I’m having trouble getting it to work though. MAME fails to start any games. Do I put the “mame” and “mame.cfg” files in /opt/retropie/emulators/mame4all? or just the one mame file?
Thanks
There is a patched copy of mame here https://drive.google.com/file/d/0B2TfYq5Awz_jWExLS2RpMHhnalE/view?usp=sharing that works for me with 2 PS3 controllers.
Squid (mame4all author) says that the latest version of the mame source is fixed for this issue but I recompiled and it still didn’t work for me, the binary at the above link does.
Put the binary in /opt/retropie/emulators/mame4all/