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The Joy-Con is internally called Ukyo. (Strings in the firmware) The firmware is written in C++. (Also found in strings in the firmware)
The Joy-Con are internally called Ukyo (Left) and Sakyo (Right). The firmware is written in C++.
= Joy-Con Firmware File =
= Joy-Con Firmware File =
The length of the firmware must be 524288 bytes.
The length of the firmware must be 524288 bytes.
== Factory Configuration Sector ==
== Factory Configuration Sector ==
{| class="wikitable" border="1"
{| class="wikitable" border="1"
|-
|-
! Description
! Description
|-
|-
| 0x00 || B || 0x10 || Serial number
| 0x00 || B || 0x10 || IdentificationCode
|-
| 0x12 || B || 0x01 || [[#Type|Type]]
|-
|-
| 0x10 || ? || 0x02 || Unknown
| 0x1B || B || 0x01 || FormatVersion
|-
|-
| 0x12 || B || 0x01 || Type descriptor (see [[#Type Descriptor|Type Descriptor]])
| 0x20 || B || 0x18 || Cal1
|-
|-
| 0x13 || ? || 0x3D || Unknown
| 0x3D || B || 0x19 || Cal2
|-
|-
| 0x50 || B || 0x03 || Body color of Controller in RGB Hex (see [[Joy-Con#Colors|Joy-Con Colors]])
| 0x50 || B || 0x0D || [[#DesignInfo|DesignInfo]]
|-
|-
| 0x53 || B || 0x03 || Button color of Controller in RGB Hex (see [[Joy-Con#Colors|Joy-Con Colors]])
| 0x80 || B || 0x18 || Model1
|-
|-
| 0x56 || ? || 0xFAA || Unknown
| 0x98 || B || 0x12 || Model2
|}
|}
=== Type Descriptor ===
=== Type===
{| class="wikitable" border="1"
{| class="wikitable" border="1"
|-
|-
! Value
! Value
! Type Name
! Name
|-
|-
| 0x01 || Joy-Con Left
| 0x01 || Joy-Con Left
|}
|}
== User Calibration Sector ==
=== DesignInfo ===
{| class="wikitable" border="1"
|-
! Offset
! Size
! Description
|-
| 0x00 || 0x06 || [[#ControllerColor|ControllerColor]]
|-
| 0x06 || 0x07 || Unknown
|}
==== ControllerColor ====
{| class="wikitable" border="1"
{| class="wikitable" border="1"
|-
|-
! Offset
! Offset
! Size
! Size
! Description
! Description
|-
|-
| 0x00 || ? || 0x11 || Unknown
| 0x00 || 0x03 || Body color of controller in RGB Hex (see [[Joy-Con#Colors|Joy-Con Colors]])
|-
|-
| 0x10 || B || 0x0B || Left Stick Calibration (Factory 0xFF?)
| 0x03 || 0x03 || Button color of controller in RGB Hex (see [[Joy-Con#Colors|Joy-Con Colors]])
|}
== User Calibration Sector ==
{| class="wikitable" border="1"
|-
! Offset
! Endianness
! Size
! Description
|-
|-
| 0x1B || B || 0x0B || Right Stick Calibration (Factory 0xFF?)
| 0x10 || B || 0x0B || LeftAnalogStickUserCal
|-
|-
| 0x26 || B || 0x1A || Sensor Calibration (Factory 0xFF?)
| 0x1B || B || 0x0B || RightAnalogStickUserCal
|-
|-
| 0x40 || ? || 0xFBF || Unknown
| 0x26 || B || 0x1A || SixAxisSensorUserCal
|}
|}
= Firmware Chunks =
= Firmware Chunks =
The firmware itself is stored in PatchRAM chunks, located at the Factory Offset or the OTA Offset. Each chunk has a Record Type, Size and Data.
The firmware itself is stored in PatchRAM chunks, located at the Factory Offset or the OTA Offset. Each chunk has a Record Type, Size and Data.
== Record Types ==
== Record Types ==
{| class="wikitable" border="1"
{| class="wikitable" border="1"
|-
|-
=== Record 0x08 ===
=== Record 0x08 ===
{| class="wikitable" border="1"
{| class="wikitable" border="1"
|-
|-
=== Record 0x0A ===
=== Record 0x0A ===
{| class="wikitable" border="1"
{| class="wikitable" border="1"
|-
|-
=== Record 0x0B ===
=== Record 0x0B ===
{| class="wikitable" border="1"
{| class="wikitable" border="1"
|-
|-
== Memory Regions ==
== Memory Regions ==
{| class="wikitable" border="1"
{| class="wikitable" border="1"
|-
|-