> For the complete documentation index, see [llms.txt](https://8bitmods.gitbook.io/manuals/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://8bitmods.gitbook.io/manuals/gameid/ps1.md).

# PS1 GameID

On a PS1 the game ID is sent to the device over the memory card port by whatever launches the game.

## Optical drive emulators

xStation, MODE and PSIO send the game ID when a game is started. When the ODE's own menu is running, the device shows the ODE's logo and keeps the current card mounted; it switches only when a game launches.

## Unirom

Unirom sends the game ID and also needs a memory card of its own for its settings. Unlike the ODE menus, Unirom is treated as a game: the boot card is mounted while Unirom's menu is open.

## FreePSXBoot and tonyhax

## Modified BIOS

## Changing card or channel from the console

The same protocol lets homebrew ask the device to move to the previous or next channel or card. Loaders that support this show it in their own menus.


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