> 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/mmce/overview.md).

# Loading games from the SD card

MMCE (Memory Card Emulator) is a protocol that lets PS2 homebrew read and write the device's storage through the memory card port. With an MMCE-aware loader you can play games from the same microSD card that holds your saves, with no USB drive, hard disk or network share.

## Requirements

* A PS2 loader with MMCE support: [OPL](https://github.com/ps2homebrew/Open-PS2-Loader) 1.2.0 or later, or [Neutrino](https://github.com/rickgaiser/neutrino).
* A fast microSD card, Class 10 / A1 or better. Game loading speed is limited by the memory card port, so faster cards give diminishing returns.
* A boot card with the loader installed, or FreeMCBoot to launch it.

## How it works

The loader opens files on the device's storage exactly as it would on a USB drive. Game folders and files are placed on the storage following the loader's own layout, for example `/DVD` and `/CD` for OPL.

While a game is streaming, the display pauses updates and buttons are ignored, because the memory card port is busy.

## Combining MMCE with GameID

MMCE loaders send the game ID before launching, so GameID switches to the game's card and the game then loads from the storage. Both features work together on any card size.


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