LCD Registers
Other registers that used to be documented on this page are now at GPU Registers.
Registers
| NAME | PHYSICAL ADDRESS | PROCESS VIRTUAL ADDRESS | KERNEL VIRTUAL ADDRESS | WIDTH |
|---|---|---|---|---|
| Parallax barrier enable | 0x10202000 | 0x1ED02000 | 0xFFFD6000 | 0x4 |
| Parallax barrier PWM | 0x10202004 | 0x1ED02004 | 0xFFFD6004 | 0x4 |
| LCD status | 0x10202008 | 0x1ED02008 | 0xFFFD6008 | 0x4 |
| LCD clock disable | 0x1020200C | 0x1ED0200C | 0xFFFD600C | 0x4 |
| ? | 0x10202010 | 0x1ED02010 | 0xFFFD6010 | 0x4 |
| LCD reset | 0x10202014 | 0x1ED02014 | 0xFFFD6014 | 0x4 |
| Top Screen LCD Configuration | 0x10202200 | 0x1ED02200 | 0xFFFD6200 | 0x600 |
| Bottom Screen LCD Configuration | 0x10202A00 | 0x1ED02A00 | 0xFFFD6A00 | 0x600 |
| ? | 0x10203200 | 0x1ED03200 | 0xFFFD7200 | 0x40 |
On screen-init (error screen), Boot11 sets 0x10202004 to 0xA390A39.
LCD Configuration
| Offset | Size | Description |
|---|---|---|
| 0x00 | 0x4 | Flags |
| 0x04 | 0x4 | Fill Color |
| 0x10 | 0x10 | Adaptive Backlight Area |
| 0x20 | 0x4 | GTH Ratio |
| 0x24 | 0x4 | Min GTH |
| 0x28 | 0x4 | MinMax |
| 0x2C | 0x4 | ExMax |
| 0x30 | 0x4 | Inertia |
| 0x38 | 0x4 | MinRS |
| 0x3C | 0x4 | MaxRS |
| 0x40 | 0x4 | Backlight Level |
| 0x44 | 0x4 | Backlight Interval |
| 0x60 | 0x20 | Dither |
| 0x80 | 0x24 | LutListRS |
| 0xF0 | 0x0C | ? |
| 0x100 | 0x100 | LCD calibration data, pulled from nand:/ro/sys/HWCAL0.dat offset 0x77C.
N3DS only. This area on old3DS is zero-filled and not writable. |
| 0x200 | 0x400 | ? |
Flags
| Bit | Description |
|---|---|
| 0 | Adaptive backlight on |
| 8 | ? |
| 9 | ? |
Bits 8 and 9 control dither.
Fill Color
| Bit | Description |
|---|---|
| 7-0 | Red component intensity |
| 15-8 | Green component intensity |
| 23-16 | Blue component intensity |
| 24 | Enable |
When the enable bit is set, the specified solid color is displayed on the LCD instead of the framebuffer.
Adaptive Backlight Area
| Offset | Description |
|---|---|
| 0x00 | X begin |
| 0x04 | X end |
| 0x08 | Y begin |
| 0x0C | Y end |
The values refer to 90° clockwise rotated screens.
Backlight Level
| Bit | Description |
|---|---|
| 9-0 | Backlight PWM duty on (0 = off) |
Backlight Interval
| Bit | Description |
|---|---|
| 9-0 | Backlight PWM Interval, minus 1 |
| 16 | Enable LCD (0 = disabled, 1 = enabled). |
| 17 | RS on (?) |
| 18 | ? |
On old 2DS, disabling the top LCD does nothing, disabling the bottom LCD affects both screens. Setting bit 18 makes the screen darker.