This has already been answered in this forum before. Try using the search function the next time you have a question. I used it, and here is what I found for you:
To dump a PlayStation BIOS, you need a GameShark or Action replay and a PC comms link. To start, you need either a real Caetla module or go to altavista and search for "Caetla" (it's a BIOS replacement for your module, so properly read the included documentation before installing it!!). Now upload "Caetla", and use use the caetla commands for downloading a binary memory image from the region 0x0bfc00000 - 0x0bfc7ffff! Now save the image as SCPHxxxx.bin, where xxxx is your PSX's model number, and AdriPSX will recognise it and use it from now on.
To dump a PlayStation BIOS, you need a GameShark or Action replay and a PC comms link. To start, you need either a real Caetla module or go to altavista and search for "Caetla" (it's a BIOS replacement for your module, so properly read the included documentation before installing it!!). Now upload "Caetla", and use use the caetla commands for downloading a binary memory image from the region 0x0bfc00000 - 0x0bfc7ffff! Now save the image as SCPHxxxx.bin, where xxxx is your PSX's model number, and AdriPSX will recognise it and use it from now on.
