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|-
|-
| [8.0.0+] || 0x7
| [8.0.0+] || 0x7
|-
| [11.0.0+] || 0x8
|}
|}
| 0x0 || 0x4 || Size of this ControllerSupportArgPrivate struct.
| 0x0 || 0x4 || Size of this ControllerSupportArgPrivate struct.
|-
|-
| 0x4 || 0x4 || Size of the storage following this one ([[#ControllerSupportArg]] or [[#ControllerFirmwareUpdateArg]]).
| 0x4 || 0x4 || Size of the storage following this one ([[#ControllerSupportArg]] or [[#ControllerFirmwareUpdateArg]]). With ShowControllerKeyRemappingForSystem, this is the size of [[#ControllerSupportArg]] even though the actual storage is [[#ControllerKeyRemappingArg]].
|-
|-
| 0x8 || 0x1 || Flag0
| 0x8 || 0x1 || Flag0
| 0xA || 0x1 || [[#ControllerSupportMode]]
| 0xA || 0x1 || [[#ControllerSupportMode]]
|-
|-
| 0xB || 0x1 || [[#ControllerSupportCaller]]. Always zero except with ShowControllerFirmwareUpdateForSystem, which sets this to the input param.
| 0xB || 0x1 || [[#ControllerSupportCaller]]. Always zero except with ShowControllerFirmwareUpdateForSystem/ShowControllerKeyRemappingForSystem, which sets this to the input param.
|-
|-
| 0xC || 0x4 || Output from [[HID_services#GetSupportedNpadStyleSet|GetSupportedNpadStyleSet]]. With ShowControllerSupportForSystem on pre-3.0.0 this is value 0.
| 0xC || 0x4 || Output from [[HID_services#GetSupportedNpadStyleSet|GetSupportedNpadStyleSet]]. With ShowControllerSupportForSystem on pre-3.0.0 this is value 0.
| 1 || [3.0.0+] ShowControllerStrapGuide
| 1 || [3.0.0+] ShowControllerStrapGuide
|-
|-
| 2 || [3.0.0+] ShowControllerFirmwareUpdate
| 2 || [3.0.0+] ShowControllerFirmwareUpdate
|-
| 4 || [11.0.0+] ShowControllerKeyRemappingForSystem
|}
|}
|-
|-
| 0x4 || 0x4 || u32 selectedId, NpadId.
| 0x4 || 0x4 || u32 selectedId, NpadId.
|}
== ControllerKeyRemappingArg ==
This is "nn::hid::system::ControllerKeyRemappingArg". This is a 0x10-byte struct.
The defaults for this is all-zero for the first 0xC-bytes.
{| class="wikitable" border="1"
|-
! Offset
! Size
! Description
|-
| 0x0 || 0x8 ||
|-
| 0x8 || 0x4 ||
|-
| 0xC || 0x4 || Padding
|}
|}
== Usage ==
== Usage ==
User-processes should push a common arguments struct, an [[#ControllerSupportArgPrivate]], then [[#ControllerSupportArg]] or [[#ControllerFirmwareUpdateArg]].
User-processes should push a common arguments struct, an [[#ControllerSupportArgPrivate]], then [[#ControllerSupportArg]] / [[#ControllerFirmwareUpdateArg]] / [[#ControllerKeyRemappingArg]].
On success, an output storage should be popped, with size 0xC being used to read from there (sdknso ignores the actual storage size). When [[#ControllerSupportArg]] was previously used, the first 8-bytes are copied to the output [[#ControllerSupportResultInfo]] (which the user can ignore), otherwise it's ignored. The remaining u32 determines the Result:
On success, an output storage should be popped, with size 0xC being used to read from there (sdknso ignores the actual storage size). When [[#ControllerSupportArg]] was previously used, the first 8-bytes are copied to the output [[#ControllerSupportResultInfo]] (which the user can ignore), otherwise it's ignored. The remaining u32 determines the Result: