I’ve dumped the PS1 Bios from my PSP. I don’t know if there is any use of it here. Anyway, here’s the dump info:
Title SCPHXXXX.bin CRC32 cc82b93b MD5 32c04484c234fd09d79625e9fe2ec232 SHA-1 b8c96eefcaedd3f8ae2a58d71671364703caaa25 Size 524288 Dump method PSP3004 with CFW (6.61 PRO-C2_22-01-2015) Dumper BIOS 2.6 VMP2MCR BIOSmerge 0.2 Dump date 07-Apr-2019
What is interesting is that when I run BIOS dumper on my PSP, it shows the following information :
Region : NTSC J BIOS version : 4.5 CRC32 : 5660F34F Date : 05/25/00
I think the difference can come from the file size. Mine is 524288 byte. On the Internet, I see a reference of this BIOS and size seems to be 145 KB.
Have anyone else tried the same operation ? If so, what is the hash of the file you obtained ?
Also, I tried with Mednafen (from RetroArch/Ubuntu), I’ve renamed my file scph5502.bin but on game start I got a black screen.
I suspect Mednafen checks the CRC32 of the bios file and if it does not matches the expected one it’s giving a black screen. If it’s the case, it’s a pity because it prevents to play with your own dumped BIOS file. Maybe a warning would be better…