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PlayStation
RetroBat system psx
Games go in roms\psx
BIOS psxonpsp660.bin, which a sync fetches when your RomM library has it
Tested rows Platforms lists each emulator and whether it passed

Which emulator to use

Leave RetroBat on its default, RetroArch with the Beetle PSX HW core (mednafen_psx_hw). Every emulator RetroBat offers for the PlayStation passed RomMBat's tests, but two of them need care:

  • BizHawk's two cores have not been checked since RetroBat 8.3.0 began handing them the whole disc set rather than disc 1. Until they are, pick another emulator for a game on several discs.
  • The standalone Mednafen has no memory card at RetroBat's settings, so a game cannot save. Set Emulated Memcards to 2 in the system's settings (Game settings, then Per system advanced configuration). It also cannot open a .chd disc image.

BIOS

A sync fetches psxonpsp660.bin from your RomM library. Every emulator but RetroArch's PCSX ReARMed core refuses to start a game without it. If your library lacks it, see BIOS and firmware.

Games on several discs

When your RomM library holds a game's discs together as one game, it arrives in a folder of its own, with a playlist that lists the discs. EmulationStation shows it as one game, and you change discs from the emulator's menu when the game asks. When your library lists each disc as a game of its own, each disc arrives as a separate game, so group them in RomM first.

Saves

A PlayStation save is a memory card. A card that holds one game's saves syncs like any other save, and a card every game shares does not, since it cannot be tied to one game (Memory cards). At RetroBat's settings every emulator but the standalone Mednafen keeps a card per game, so leave those as they are. Switching DuckStation to a shared card, or turning on PCSX ReARMed's second card, which every game shares, leaves those saves on this device.

A save follows you to another emulator only where the two read the same file (Changing emulator). On the PlayStation:

  • RetroArch's three cores share one card per game.
  • BizHawk's two cores share another.

The rest each keep their own.

Known issues

A DuckStation save state that RomMBat brought back loads only from EmulationStation's save-state menu, not from DuckStation's own load menu.