NDS IPC Reverse Engineering

gistfile1.txt

FIFO Message Header:
--------------------
dddddddddddddddddddddddddd f ttttt

Tag (lower 5 bits, mask 0x1F)
Error (bit5, mask 0x20)
Data (Upper 26 bits, mask 0xFFFFFFC0)

FIFO Data Packing (26 bits):
--------------------
Command (mask 0x7F00, >> 8)
TODO

Tag IDs:
--------
0x00 - Unimplemented (hachihachi) TODO
0x01 - Unimplemented (hachihachi) TODO
0x02 - Unimplemented (hachihachi) TODO
0x03 - Unimplemented (hachihachi) TODO
0x04 - NVRAM
0x05 - RTC (Real Time Clock)
0x06 - TouchPanel
0x07 - Sound
0x08 - PM (Power Management)
0x09 - Microphone
0x0A - WM (Wireless Manager)
0x0B - FS (FileSystem)
0x0C - OS
0x0D - Cartridge
0x0E - Unimplemented (hachihachi) TODO
0x0F - WirelessVR
0x10 - Cartridge Unk10
0x11 - Cartridge Unk11
0x12 - WRAM Bank Control (TWL)
0x13 - AES (TWL)
0x14 - FATFS (TWL)
0x15 - Camera (TWL)
0x16 - NWM (TWL)
0x17 - SCFG (TWL)
0x18 - DSi Sound (TWL)
0x1F - Unk (TWL, only in Launcher?)


TouchPanel PXI:
---------------
Data & 0x2000000 - Resets idk
Data & 0x1000000 - SPI idk
Data & 0x000F0000 - Some index

WM PXI:
-------
Data - Address
hachihachi only allows cmds 0x00 (Initialize), 0x01 (Reset), 0x02 (End), 0x0A (StartScan), 0x0B (EndScan), 0x26 (StartScanEx)

u16 [Data+0] - Cmd
 ___________________________
| Cmd |        Name         |
|-----|---------------------|
|0x00 | Initialize          |
|0x01 | Reset               |
|0x02 | End                 |
|0x03 | Enable              |
|0x04 | Disable             |
|0x05 | PowerOn             |
|0x06 | PowerOff            |
|0x07 | SetParentParam      |
|0x08 | StartParent         |
|0x09 | EndParent           |
|0x0A | StartScan           |
|0x0B | EndScan             |
|0x0C | Unk0C               |
|0x0D | Unk0D               |
|0x0E | StartMP             |
|0x0F | Unk0F               |
|0x10 | EndMP               |
|0x11 | Unk11               |
|0x12 | Unk12               |
|0x13 | Unk13               |
|0x14 | Unk14               |
|-----|---------------------|
|0x18 | SetGameInfo         |
|0x19 | SetBeaconTxRxInd    |
|0x1A | Unk1A               |
|0x1B | Unk1B               |
|0x1C | Unk1C               |
|0x1D | SetLifeTime         |
|0x1E | MeasureChannel      |
|0x1F | InitWirelessCounter |
|0x20 | Unk20               |
|0x21 | SetEntry            |
|0x22 | Unk22               |
|0x23 | Unk23               |
|0x24 | Unk24               |
|0x25 | Unk25               |
|0x26 | StartScanEx         |
|0x27 | Unk27               |
|0x28 | Unk28               |
|0x29 | Unk29               |
|0x2A | Unk2A               |
|0x2B | Unk2B               |
|0x2C | Unk2C               |
|0x2D | Unk2D               |
|_____|_____________________|

OS PXI:
-------
 _____________
|Cmd  | Name  |
|-----|-------|
|0x10 | Reset |
|_____|_______|


FATFS PXI:
----------

 ___________________________
| Cmd |        Name         |
|-----|---------------------|
|0x00 | Mount               |
|0x01 | Unmount             |
|0x02 | Unk02               |
|0x03 | Unk03               |
|0x04 | Unk04               |
|0x05 | Unk05               |
|0x06 | Unk06               |
|0x07 | Unk07               |
|0x08 | Unk08               |
|0x09 | Unk09               |
|0x0A | Unk0A               |
|0x0B | Unk0B               |
|0x0C | Unk0C               |
|0x0D | Unk0D               |
|0x0E | Unk0E               |
|0x0F | Unk0F               |
|0x10 | Unk10               |
|0x11 | Unk11               |
|0x12 | Unk12               |
|0x13 | Unk13               |
|0x14 | Unk14               |
|0x15 | Unk15               |
|0x16 | Unk16               |
|0x17 | Unk17               |
|0x18 | Unk18               |
|0x19 | Unk19               |
|0x1A | Unk1A               |
|0x1B | Unk1B               |
|0x1C | Unk1C               |
|0x1D | Unk1D               |
|0x1E | Unk1E               |
|0x1F | Unk1F               |
|0x20 | Unk20               |
|_____|_____________________|

NWM PXI:
--------
Data - Address

u16 [Data+0] - Cmd
 ___________________________
| Cmd |        Name         |
|-----|---------------------|
|0x00 | nullsub             |
|0x01 | Reset               |
|0x02 | nullsub             |
|0x03 | Open?               |
|0x04 | Close?              |
|0x05 | Scan                |
|0x06 | Unk06               |
|0x07 | Unk07               |
|0x08 | Unk08               |
|0x09 | Unk09               |
|0x0A | Unk0A               |
|0x0B | Unk0B               |
|0x0C | Unk0C               |
|0x0D | Unk0D               |
|0x0E | Unk0E               |
|0x0F | Unk0F               |
|0x10 | Unk10               |
|0x11 | Unk11               |
|0x12 | Unk12               |
|0x13 | LoadFirmware?       |
|0x14 | Unk14               |
|0x15 | Unk15               |
|0x16 | Unk16               |
|0x17 | Unk17               |
|0x18 | Unk18               |
|0x19 | Unk19               |
|0x1A | Unk1A               |
|0x1B | Unk1B               |
|0x1C | Unk1C               |
|0x1D | Unk1D               |
|0x1E | Unk1E               |
|_____|_____________________|