PlayStation Development Network

Is it possible to somehow run games off an Action Replay cartridge?

On the Caetla's FAQ it says it can run Yaroze games, so I wonder if the game would be stored on the Action Replay cartridge itself.

It would be cool if that was possible, would make for an easy way to test if playstation consoles that don't have a working cd drive are functioning correctly, just plug the cartridge and start playing.

That kind of cartridges have around 256Kbytes FLASH memory, which contains the firmware (eg. caetla), there isn't any additional memory to store games on those cartridges.

Running games means uploading them via cable connection from PC to the connector on the PSX cartridge. There are different cartridges with different (but similar looking) DB25 connectors: Most have parallel "printer port" connectors, Datel has custom Comms-Link connectors, Psy-Q has SCSI connectors.

Uploading plain EXE files should work with all cartridge types. I think Yaroze and Caetle do additionally have some transfer protocol implemented for uploading additional data files (which can be loaded from within the EXE file).