I've heard rumors that Williams simply hired Sony to use an early copy of their ATRAC proprietary compression. Would like to know if there is truth in this or not, among other various fascinations.
There have been emulators for many years which can play these ROMS exactly as they were in game, all open source It's really cool technology and I find it very interesting. Curious if others do as well.
It looks like that emulator does quite a lot more than just that one format. Might be a good idea to check out the entire source code and then search the logs for mentions of the Williams devices so that you can figure out which code actually does the ROMs you have.