PlayStation Development Network

Hello everyone, I recently decided to create an experimental playstation 1 emulator, so I decided to start with the bios, does the bios of the playstation keep any metadata with information like region, language etc? Similar to the information of a gameboy carcucho that contains information even the company responsible for development. If so, how could I extract this information?

The BIOS doesn't have a header, the first byte of it is the entry point. All id strings contained inside the data are retrieved via system calls and can not always be found in the same spot.