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