Dear Acris dear Voljega, it took me weeks to get back to that problem for I was almost desperate. Thank you. What I did was simply - download the correct rom for mame4all - set the emulator to libretto and MAME078 - I do not know why this works, I still do not get it. Thanks anyway.   Sebastian

Dear Folks, i am running the newest recalbox on rpi3 with gpio controller. I have a special interest to get the mame ROM  polyplay.zip (attatched) that i got from theoldcomputer.com section Mame and Mame4All to run. On recalbox I only get the menu of the game but the game is waiting for a coin to be inserted. I already checked: - Mame-Menu (TAB) - does not appear - All Keyboard Keys (expected was CTRL-Key but it does not work) - GPIO-Controller Pins on different settings The game does run on retropie on emulators "advmame" and "mame4all". The key for coin is CTRL. Can anybody help me with a solution or a hint what to try? I really want to get it to run, it is so nice eighties homebrew. Thanks a lot. Sebastian