Download the latest jtbeta.zip from Jotego’s Patreon and place it directly into the /games/mame folder on your SD card.
On the MiSTer, the system is designed to read the key directly from the ZIP archive. jtbeta.zip
Supporters receive the jtbeta.zip file, which acts as a license key to unlock new cores while they are still in the testing phase. Download the latest jtbeta
Once a core is fully polished and stable—usually after several months of testing—it is typically released to the public for free, and the key is no longer required. How to Use jtbeta.zip jtbeta.zip