I got two 1-button keyboards to function as COIN1 and COIN2. One of them sends a Space keypress and the other sends an Enter keypress:
https://www.amazon.com/dp/B09CLBDYSS
MiSTer lets me map COIN to the one that sends Space but pressing it after that doesn't add a credit. I've tried several cores. Any idea what could be in the way there?
MiSTer doesn't let me map COIN to the one that sends Enter because Enter stops the MiSTer button remapping process. Is there any way around that so I can map to Enter?