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| u16, Actual read size
| u16, Actual read size
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= Channels =
== Channel 2 (Audio) ==
Channel 2 returns the DSP DRAM addresses of structures located in the [[DSP Memory Region]]. [[DSP:ConvertProcessAddressFromDspDram]] can be used to convert these addresses into virtual memory addresses. The list of addresses and the length of the list vary depending on DSP firmware version.
== Channel 3 (Binary) ==
The purpose of channel 3 is unknown. The behaviour of this pipe varies depending on DSP firmware version. Observed behaviours include:
* doing nothing.
* echoing what is returned to it.
* long strings of zeros.