PlayStation Development Network

Hello
I'm looking for more informations about undo deleted save from memory card. How exacly it works and on which models it works? It is related to bios or model version?
I'm talking about this function https://newsbeezer.com/argentinaeng/pla ... -function/

How it works is the Memory Cards use a basic FAT filesystem which includes an un-delete option to recover the previously sector marked as free. If you format the card, then you can't un-delete obviously. Sony has some example Psy-Q programs which can demonstrate this.

As for which models have it, that will depend on the BIOS revision and if the BIOS programmer took it out or not. I don't think there is a list at the moment of which BIOS' have it or not so someone will have to manually test each revision manually and make note of it.