HID Shared Memory

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 in bytes	Description
0x0	0x400	Unknown, Header?
0x400	0x3000	Capacitive Touchscreen
0x3400	0x400	Mouse
0x3800	0x400	Keyboard
0x3C00	0x400	Unknown, header and 17 entries
0x4000	0x400	Unknown, header and 17 entries
0x4400	0x400	Unknown, header and 17 entries
0x4800	0x400	Unknown, header and 17 entries
0x4C00	0x200	Unknown, header which says it has 17 entries, but the max entry index is 0
0x4E00	0x200	Unknown, header which says it has 17 entries, but the max entry index is 0
0x5000	0x200	Unknown, header which says it has 17 entries, but the max entry index is 0
0x5200	0x80*0x10	Unknown, 16 structures with a header and 2 entries each
0x5A00	0x4000	Controller Serials?
0x9A00	0x32000	Controllers
0x3BA00	0x4600	Unknown
0x3C200	?	[5.0.0+] SevenSixAxisSensor

Capacitive Touchscreen

Offset	Size in bytes	Description
0x0	0x28	Touch Header
0x28	0x298 * 17	Touch Entries

Touch Header

Offset	Size in bytes	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

Touch Entry

Offset	Size in bytes	Description
0x0	0x10	Touch Entry Header
0x10	0x28 * 16	Touch Data

Touch Structure Header

Offset	Size in bytes	Description
0x0	0x8	Timestamp in samples
0x8	0x8	Number of Touches

Touch Data Entry

Offset	Size in bytes	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 in bytes	Description
0x0	0x20	Mouse Header
0x20	0x30 * 17	Mouse Entries

Mouse Header

Offset	Size in bytes	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

Mouse Entry

Offset	Size in bytes	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 in bytes	Description
0x0	0x20	Keyboard Header
0x20	0x38 * 17	Keyboard Entries

Keyboard Header

Offset	Size in bytes	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

Keyboard Entry

Offset	Size in bytes	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

Controllers

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

Controller

Offset	Size in bytes	Description
0x0	0x28	Controller Header
0x28	0x20 header + 0x30 * 17	Controller Pro Controller State
0x378	0x20 header + 0x30 * 17	Controller Handheld Joined State
0x6C8	0x20 header + 0x30 * 17	Controller Joined State (Lone Joy-Con or Pair of Joy-Con)
0xA18	0x20 header + 0x30 * 17	Controller Left State (Vertical Controls w/ Joy-Con Half)
0xD68	0x20 header + 0x30 * 17	Controller Right State (Vertical Controls w/ Joy-Con Half)
0x10B8	0x20 header + 0x30 * 17	Controller Main State (No Analog Sticks)
0x1408	0x20 header + 0x30 * 17	Controller Main State
0x1758	0x20 header + 0x68 * 17	SixAxisSensor Pro Controller State
0x1E60	0x20 header + 0x68 * 17	SixAxisSensor Handheld State
0x2568	0x20 header + 0x68 * 17	SixAxisSensor Pair Left State
0x2C70	0x20 header + 0x68 * 17	SixAxisSensor Pair Right State
0x3378	0x20 header + 0x68 * 17	SixAxisSensor Single Left State
0x3A80	0x20 header + 0x68 * 17	SixAxisSensor Single Right State
0x4188	0x4	DeviceType
0x418C	0x4	Padding
0x4190	0x8	Flags
0x4198	0x4	Flags2
0x419C	0x4	PowerInfo0 battery state
0x41A0	0x4	PowerInfo1 battery state
0x41A4	0x4	PowerInfo2 battery state
0x41D0	0x10	Controller MAC
0x41F0	0x10	Controller MAC

The battery state must be 0-4.

Flags

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

Flags2

Bit0: clear = UnintendedHomeButtonInputProtectionEnabled.

Controller Header

Offset	Size in bytes	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)

Controller State Header

Offset	Size in bytes	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

Controller State

Offset	Size in bytes	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

SixAxisSensor State Header

Offset	Size in bytes	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

SixAxisSensor State Entry

Offset	Size in bytes	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.