Registers
| NAME | PHYSICAL ADDRESS | WIDTH | INFO |
|---|---|---|---|
| SPI_CFG | 0x101401C0 | 4 | |
| SHAREDWRAM_CFG | 0x10141000 | 16 | |
| ? | 0x10141100 | 1 | |
| ? | 0x10141103 | 1 | |
| ? | 0x10141104 | 1 | |
| ? | 0x10141105 | 1 | |
| ? | 0x10141108 | 1 | |
| PDN_WIFI? | 0x1014110C | 1 | |
| ? | 0x10141140 | 1 | |
| ? | 0x10141141 | 1 | |
| PDN_WIFI | 0x10141180 | 1 | 1=Internet?, 0=Streetpass? |
| PDN_HID | 0x101411C0 | 1 | |
| ? | 0x10141200 | 4 | |
| ? | 0x10141FFC | 4 | |
| ? | 0x10141008 | 4 | |
| ? | 0x1014100C | 4 | |
| PDN_TWLMODE? | 0x10141100 | 2 | |
| ? | 0x10141104 | 2 | |
| ? | 0x10141110 | 2 | |
| ? | 0x10141112 | 2 | |
| ? | 0x10141114 | 2 | |
| ? | 0x10141116 | 2 | |
| PDN_LCD | 0x10141200 | 1 | Boot11 sets/clears bit16, bit0. |
| PDN_BACKLIGHT | 0x10141202 | 1 | |
| ? | 0x10141204 | 1 | Boot11 sets/clears bit0. |
| ? | 0x10141210 | 1 | |
| PDN_CODEC | 0x10141220 | 1 | |
| PDN_CAMERA | 0x10141224 | 1 | |
| ? | 0x10141230 | 1 |
0x1EC41008 and 0x1EC4100C
These are the PDN PTM registers used for the PDN PTM service.
PDN_TWLMODE
The very last 3DS-mode register poke the TWL_FIRM Process9 does before it gets switched into TWL-mode, is writing 0x8000 to this register. However, writing 0x8000 to here from the ARM9 with NATIVE_FIRM running doesn't seem to do anything, other reg-pokes likely need done first.
PDN_LCD
This one seems to control the LCD displays?
PDN_BACKLIGHT
This is the power register used for the LCD backlights.
bit0 = turn on/off LCD backlight, rest = always 0.
PDN_CODEC
This is the power register used for the PDN CODEC service.
bit0 = unknown, bit1 = turn on/off DSP, rest = always 0.
PDN_CAMERA
This is the power register used for the PDN camera service.
bit0 = unknown, bit1 = turn on/off cameras, rest = always 0.