[PSX] Support for non-retail BIOS

frarees commented 3 years ago

It seems mednafen is already able to handle this (related discussion https://forum.fobby.net/index.php?t=tree&th=1939)

UX Proposal 1:

Let users load the additional files (i.e. PSX-XBOO.ROM and PSXONPSP660.BIN), the same way it does with retail BIOS, and have it check against specific MD5s.
Let users decide (via e.g. radio buttons) to use retail (will pick based on region) or any of the other ones (picked specificially i.e. I want to load with the PSP dumped BIOS).

UX Proposal 2:

Let users load one additional custom BIOS file, no checksum validation.
Let users specify if they want to use the custom BIOS over the retail ones (or simply, if there's a custom BIOS specified, just go for it).

IMO the second proposal would be the least convoluted, and can be easily delivered as an advanced-only feature (Secrets?).

clobber commented 3 years ago

I would confirm with Ryphecha first if there are any compatibility issues before I added support for this. Downloading the original retail BIOS files are not a big deal, so I don't care too much about this BIOS that was ripped from PSP firmware.

frarees commented 3 years ago

I would confirm with Ryphecha first if there are any compatibility issues before I added support for this.

👍

Downloading the original retail BIOS files are not a big deal, so I don't care too much about this BIOS that was ripped from PSP firmware.

Yeah not an issue at all. I was more interested in the differences from those BIOS vs the retail ones (e.g. no boot screen).

OpenEmu / Mednafen-Core

[PSX] Support for non-retail BIOS #23