HID Shared Memory

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HID shared memory is a 0x40000 byte read-only segment of memory shared between applications for input. The segment contains structures for most if not all input methods available to applications.

Memory Map

Offset Size Description
0x0 0x400 DebugPad
0x400 0x3000 #TouchScreen
0x3400 0x400 #Mouse
0x3800 0x400 #Keyboard
0x3C00 0x400 BasicXpad
0x4000 0x400 Unknown, header and 17 entries
0x4400 0x400 Unknown, header and 17 entries
0x4800 0x400 Unknown, header and 17 entries
0x4C00 0x200 HomeButton
0x4E00 0x200 SleepButton
0x5000 0x200 CaptureButton
0x5200 0x800 InputDetector
0x5A00 0x4000 Controller Serials?
0x9A00 0x32000 Npad
0x3BA00 0x4600 Gesture
0x3C200 ? [5.0.0+] ConsoleSixAxisSensor

TouchScreen

Offset Size Description
0x0 0x28 #TouchScreenHeader
0x28 0x298 * 17 Array of #TouchScreenState

TouchScreenHeader

Offset Size Description
0x0 0x8 Timestamp in ticks?
0x8 0x8 Number of Entries, always 17
0x10 0x8 Latest Entry Index
0x18 0x8 Maximum Entry Index, always 16
0x20 0x8 Timestamp in samples

TouchScreenState

Offset Size Description
0x0 0x10 #TouchScreenStateHeader
0x10 0x28 * 16 #TouchScreenStateData

TouchScreenStateHeader

Offset Size Description
0x0 0x8 Timestamp in samples
0x8 0x8 Touch count

TouchScreenStateData

Offset Size Description
0x0 0x8 Timestamp in samples
0x8 0x4 Padding
0xC 0x4 Touch Index
0x10 0x4 Touch X
0x14 0x4 Touch Y
0x18 0x4 Touch Diameter X
0x1C 0x4 Touch Diameter Y
0x20 0x4 Angle
0x24 0x4 Padding

Mouse

Offset Size Description
0x0 0x20 #MouseHeader
0x20 0x30 * 17 Array of #MouseState

MouseHeader

Offset Size Description
0x0 0x8 Timestamp in ticks?
0x8 0x8 Number of Entries, always 17
0x10 0x8 Latest Entry Index
0x18 0x8 Maximum Entry Index, always 16

MouseState

Offset Size Description
0x0 0x8 Timestamp in samples
0x8 0x8 Timestamp in samples again?
0x10 0x4 Mouse X
0x14 0x4 Mouse Y
0x18 0x4 Mouse X Change
0x1C 0x4 Mouse Y Change
0x20 0x4 Scroll Change Y
0x24 0x4 Scroll Change X
0x28 0x8 Mouse Buttons

Keyboard

Offset Size Description
0x0 0x20 #KeyboardHeader
0x20 0x38 * 17 Array of #KeyboardState

KeyboardHeader

Offset Size Description
0x0 0x8 Timestamp in ticks?
0x8 0x8 Number of Entries, always 17
0x10 0x8 Latest Entry Index
0x18 0x8 Maximum Entry Index, always 16

KeyboardState

Offset Size Description
0x0 0x8 Timestamp in samples
0x8 0x8 Timestamp in samples again?
0x10 0x8 Modifier Mask
0x18 0x20 Keys Down, each key gets one bit based on the HID keyboard scan code (F1 is 0x3A, bit 0x3A is set)

Controller Serials?

This section contains a series of 16 structures 0x400 bytes large.

Offset Size in bytes Description
0x30 0xE Controller Serial
0x60 0xE Controller Serial

Npad

This section contains a series of 10 0x5000 byte structures describing each available controller.

Controller Index Description
0 to 7 Players 1 to 8
8 Handheld Mode
9 Unknown

NpadInternalState

Offset Size Description
0x0 0x28 #NpadInternalStateHeader
0x28 0x20 NpadFullKeyHeader
0x48 0x30 * 17 Array of NpadFullKeyState
0x378 0x20 #NpadHandheldHeader
0x398 0x30 * 17 Array of #NpadHandheldState
0x6C8 0x20 NpadJoyDualHeader
0x6E8 0x30 * 17 Array of NpadJoyDualState
0xA18 0x20 NpadJoyLeftHeader
0xA38 0x30 * 17 Array of NpadJoyLeftState
0xD68 0x20 NpadJoyRightHeader
0xD88 0x30 * 17 Array of NpadJoyRightState
0x10B8 0x20 NpadPalmaHeader
0x12B8 0x30 * 17 Array of NpadPalmaState
0x1408 0x20 NpadSystemExtHeader
0x1428 0x30 * 17 Array of NpadSystemExtState
0x1758 0x20 NpadSixAxisSensorFullKeyHeader
0x1778 0x68 * 17 Array of NpadSixAxisSensorFullKeyState
0x1E60 0x20 NpadSixAxisSensorHandheldHeader
0x1E80 0x68 * 17 Array of NpadSixAxisSensorHandheldState
0x2568 0x20 NpadSixAxisSensorJoyLeftDualHeader
0x2588 0x68 * 17 Array of NpadSixAxisSensorJoyLeftDualState
0x2C70 0x20 NpadSixAxisSensorJoyRightDualHeader
0x2C90 0x68 * 17 Array of NpadSixAxisSensorJoyRightDualState
0x3378 0x20 NpadSixAxisSensorJoyLeftHeader
0x3398 0x68 * 17 Array of NpadSixAxisSensorJoyLeftState
0x3A80 0x20 NpadSixAxisSensorJoyRightHeader
0x3AA0 0x68 * 17 Array of NpadSixAxisSensorJoyRightState
0x4188 0x4 DeviceType
0x418C 0x4 Padding
0x4190 0x8 #NpadSystemProperties
0x4198 0x4 #NpadSystemButtonProperties
0x419C 0x4 PowerInfo0 battery state (must be 0-4)
0x41A0 0x4 PowerInfo1 battery state (must be 0-4)
0x41A4 0x4 PowerInfo2 battery state (must be 0-4)
0x41A8 0x20 (header) + 0x20 * 2 NfcXcdDeviceHandleState
0x4208 0x8 Mutex
0x4248 0x20 (header) + 0x18 * 17 NpadGcTriggerState

NpadInternalStateHeader

Offset Size Description
0x0 0x4 Status, bit0 Pro Controller/HID controller, bit1 wired for handheld, bit2 pair, bit3 left, bit4 right
0x4 0x4 Is Joy-Con Half
0x8 0x4 bit1 color set does not exist
0xC 0x4 RGBA Body Color (single Joy-Con or Pro Controller)
0x10 0x4 RGBA Button Color (single Joy-Con or Pro Controller)
0x14 0x4 bit1 color set does not exist
0x18 0x4 RGBA Body Color (right Joy-Con)
0x1C 0x4 RGBA Button Color (right Joy-Con)
0x20 0x4 RGBA Body Color (left Joy-Con)
0x24 0x4 RGBA Button Color (left Joy-Con)

NpadHandheldHeader

Offset Size Description
0x0 0x8 Timestamp in ticks?
0x8 0x8 Number of entries, always 17
0x10 0x8 Latest Entry Index
0x18 0x8 Maximum Entry Index, always 16

NpadHandheldState

Offset Size Description
0x0 0x8 Timestamp in samples
0x8 0x8 Timestamp in samples again
0x10 0x8 #Button State
0x18 0x4 Left Joystick X
0x1C 0x4 Left Joystick Y
0x20 0x4 Right Joystick X
0x24 0x4 Right Joystick Y
0x28 0x8 Controller State (bit0 connected, bit1 wired)
Button State
Bit Button
0 A
1 B
2 X
3 Y
4 Left Stick Pressed
5 Right Stick Pressed
6 L
7 R
8 ZL
9 ZR
10 Plus
11 Minus
12 Left
13 Up
14 Right
15 Down
16 Left Stick Left
17 Left Stick Up
18 Left Stick Right
19 Left Stick Down
20 Right Stick Left
21 Right Stick Up
22 Right Stick Right
23 Right Stick Down
24 SL
25 SR
NpadSixAxisSensorHandheldHeader
Offset Size Description
0x0 0x8 Timestamp in ticks?
0x8 0x8 Number of entries, always 17
0x10 0x8 Latest Entry Index
0x18 0x8 Maximum Entry Index, up to 16
NpadSixAxisSensorHandheldState
Offset Size Description
0x0 0x8 Timestamp in samples
0x8 0x8 Unknown
0x10 0x8 Timestamp in samples again
0x1C 0x4 * 3 Accelerometer data as 3 floats
0x24 0x4 * 3 Gyroscope data as 3 floats
0x30 0x4 * 3 Unknown sensor data as 3 floats
0x3C 0x4 * 9 Orientation basis as 3x3 matrix of floats
0x60 0x8 Unknown, always 1

Official sw copies the data from offset 0x8 size 0x60 to the final output state.

NpadSystemProperties

Bit Description
0 PowerInfo0 isCharging
1 PowerInfo1 isCharging
2 PowerInfo2 isCharging
3 PowerInfo0 powerConnected
4 PowerInfo1 powerConnected
5 PowerInfo2 powerConnected
6-8 Unused
9 UnsupportedButtonPressed_NpadSystem
10 UnsupportedButtonPressed_NpadSystemExt
11 AbxyButtonOriented
12 SlSrButtonOriented
13 [4.0.0+] PlusButtonCapability
14 [4.0.0+] MinusButtonCapability
15 [8.0.0+] DirectionalButtonsSupported
16-63 Unused

NpadSystemButtonProperties

Bit Description
0 UnintendedHomeButtonInputProtectionEnabled (if cleared)
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