DSP:ReadPipeIfPossible
RequestEdit
| Index Word | Description |
|---|---|
| 0 | Header code [0x001000c0] |
| 1 | Channel (0 - 7 0:Debug from DSP 1:P-DMA 2:audio 3:binary 4-7: free ?) |
| 2 | Peer (0 = from DSP, 1 = from ARM) |
| 3 | u16, Size |
0x100 byte after the Request header
| Index Word | Description |
|---|---|
| 0 | (Size << 14) | 0x2 |
| 1 | Buffer |
ResponseEdit
| Index Word | Description |
|---|---|
| 0 | Header code |
| 1 | Result code |
| 2 | u16, Actual read size |
ChannelsEdit
Channel 2 (Audio)Edit
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)Edit
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.