dolphin/docs/DolphinDeviceIOCTLs.md

/dev/dolphin

This is an IOS device provided by Dolphin Emulator for the purpose of allowing homebrew and game mods to check if they're running on Dolphin, as well as detect how the emulator is running in order.

If the open is successful, it means that homebrew/mod must be running on emulator, and can skip certain things that won't work like patching IOS or enable emulator only features.

IOCTL Listing

Request Number	Name	Inputs	Outputs	Notes
0x01	GetElapsedTime	none	4 bytes (u32)	Returns the elapsed time in milliseconds since emulation started.
0x02	GetVersion	none	null-terminated string	Returns Dolphin's current version, based on the SCM version string.
0x03	GetSpeedLimit	none	4 bytes (u32)	Returns the maximum speed emulation can go, in percentage (i.e. 100%).
0x04	SetSpeedLimit	4 bytes (u32)	none	Changes the emulation speed limit. The calculation is float(val) / float(100).
0x05	GetCpuSpeed	none	4 bytes (u32)	Returns the emulated CPU's clock speed.
0x06	GetRealProductCode	none	null-terminated string	Returns the CODE field from the setting.txt file of the Wii's NAND.
0x07	SetDiscordClient	char*	none	Changes the Discord Rich Presence Client ID.
0x08	SetDiscordPresence	10 vectors: [details (char*), state (char*), large_image_key (char*), large_image_text (char*), small_image_key (char*), small_image_text (char*), start_timestamp (u64), end_timestamp (u64), party_size (u32), party_max (u32)]	none	Updates the current Discord Rich Presence activity. See Discord developer documentation for a full description of the API.
0x09	ResetDiscord	none	none	Resets the Discord Rich Presence back to Dolphin defaults.
0x0A	GetSystemTime	none	8 bytes (u64)	Returns the system time in milliseconds since UNIX epoch.

This information was originally compiled on WiiBrew by AndrewPiroli and ProfElements before being ported to this document.

References

• Dolphin Source Code