In the world of arcade preservation, "EPR" refers to an chip found on physical arcade hardware. The epr-14869b.25 file is a 64KB digital dump of the BIOS used by the Sega Model 1 communication and I/O boards.
If you have downloaded the file as part of a ROM set or update pack from sites like Le Geek , follow these steps: epr-14869b.25 download