Difference between revisions of "Joy-Con Firmware"

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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)
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#REDIRECT [[Joy-Con]]
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= Joy-Con Firmware File =
 
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The length of the firmware must be 524288 bytes.
 
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{| class="wikitable" border="1"
 
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|-
 
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! Offset
 
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! Endianness
 
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! Size
 
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! Description
 
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|-
 
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| 0x00 || B || 0x14 || Magic number??
 
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|-
 
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| 0x15 || L || 0x06 || Unique MAC Address of controller
 
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|-
 
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| 0x3B3 || L || 0x04 || Offset to Factory Firmware
 
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|-
 
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| 0x1FF4 || B || 0x08 || OTA Magic, if the controller is Over-The-Air updated.
 
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|-
 
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| 0x1FFC || L || 0x04 || Offset to OTA Firmware, if OTA Magic is valid.
 
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|-
 
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| 0x6000 || Mixed || 0x1000 || Factory configuration (see [[#Factory Configuration Sector|Factory Configuration Sector]])
 
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|-
 
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| 0x8000 || Mixed || 0x1000 || User calibration (see [[#User Calibration Sector|User Calibration Sector]])
 
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|}
 
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== Factory Configuration Sector ==
 
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{| class="wikitable" border="1"
 
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|-
 
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! Offset
 
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! Endianness
 
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! Size
 
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! Description
 
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| 0x00 || B || 0x10 || Serial number
 
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|-
 
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| 0x10 || ? || 0x02 || Unknown
 
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|-
 
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| 0x12 || B || 0x01 || Type descriptor (see [[#Type Descriptor|Type Descriptor]])
 
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| 0x13 || ? || 0x3D || Unknown
 
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| 0x50 || B || 0x03 || Body color of Controller in RGB Hex  (see [[Joy-Con#Colors|Joy-Con Colors]])
 
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| 0x53 || B || 0x03 || Button color of Controller in RGB Hex (see [[Joy-Con#Colors|Joy-Con Colors]])
 
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| 0x56 || ? || 0xFAA || Unknown
 
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|}
 
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=== Type Descriptor ===
 
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{| class="wikitable" border="1"
 
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|-
 
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! Value
 
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! Type Name
 
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| 0x01 || Joy-Con Left
 
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|-
 
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| 0x02 || Joy-Con Right
 
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|-
 
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| 0x03 || Pro Controller
 
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|}
 
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== User Calibration Sector ==
 
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{| class="wikitable" border="1"
 
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|-
 
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! Offset
 
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! Endianness
 
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! Size
 
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! Description
 
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| 0x00 || ? || 0x11 || Unknown
 
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|-
 
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| 0x10 || B || 0x0B || Left Stick Calibration (Factory 0xFF?)
 
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|-
 
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| 0x1B || B || 0x0B || Right Stick Calibration (Factory 0xFF?)
 
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| 0x26 || B || 0x1A || Sensor Calibration (Factory 0xFF?)
 
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| 0x40 || ? || 0xFBF || Unknown
 
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|}
 
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= Firmware Chunks =
 
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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.
 
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{| class="wikitable" border="1"
 
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|-
 
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! Offset
 
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! Endianness
 
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! Size
 
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! Description
 
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| 0x00 || L || 0x01 || Record type (see [[#Record Types|Record Types]])
 
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| 0x01 || L || 0x02 || Size of data (size)
 
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| 0x03 || Mixed || (size) || Data
 
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|}
 
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== Record Types ==
 
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{| class="wikitable" border="1"
 
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|-
 
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! Value
 
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! Record name
 
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! Description
 
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| 0x08 || REC8 || ROM1 Patches (See [[#Record 0x08|Record 0x08]] and [[#Memory Regions|Memory Regions]])
 
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| 0x0A || RECA || RAM (Ram Low and Ram High) Patches (See [[#Record 0x0A|Record 0x0A]] and [[#Memory Regions|Memory Regions]])
 
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| 0x0B || RECB || Unknown
 
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| 0xFE || END || End of chunk stream
 
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|}
 
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=== Record 0x08 ===
 
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{| class="wikitable" border="1"
 
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|-
 
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! Offset
 
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! Endianness
 
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! Size
 
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! Description
 
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|-
 
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| 0x00 || L || 0x01 || Index
 
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|-
 
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| 0x01 || L || 0x04 || Address
 
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| 0x05 || B || 0x04 || Data
 
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|-
 
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| 0x09 || L || 0x02 || Unk1?
 
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| 0x0B || L || 0x02 || Unk2?
 
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| 0x0D || L || 0x02 || Body size???
 
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|}
 
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=== Record 0x0A ===
 
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{| class="wikitable" border="1"
 
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|-
 
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! Offset
 
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! Endianness
 
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! Size
 
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! Description
 
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! Note
 
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| 0x00 || L || 0x04 || Address || -
 
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| 0x04 || B || (Note) || Data || To calculate the size do: chunk_datasize (See [[#Firmware Chunks|Firmware Chunks]])-4
 
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|}
 
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=== Record 0x0B ===
 
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{| class="wikitable" border="1"
 
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|-
 
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! Offset
 
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! Endianness
 
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! Size
 
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! Description
 
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|-
 
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| 0x00 || L || 0x04 || Address
 
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|}
 
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== Memory Regions ==
 
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{| class="wikitable" border="1"
 
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! Offsets
 
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! Description
 
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| 0x00-0xC8000 || ROM 1
 
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| 0x260000-0x26C000 || ROM 2
 
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| 0xD0000-0x0x0DFFFF || RAM Low
 
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| 0x200000-0x247FFF || RAM High
 
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|}
 

Latest revision as of 20:43, 20 August 2023

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