The Nintendo NFC adapter is an upcoming external device which adds NFC capabilities for amiibos to old Nintendo 3DS and Nintendo 2DS consoles, using the infrared port on the back of the console.
Technical details
Based on analysis of the fangate_updater.bin file, which is part of the old Nintendo 3DS operating system since 9.3.0-21 and contains the firmware running on the external adapter; and analysis of the NFC Services running on old 3DS.
- SOC inside the adapter: Broadcom BCM20791B1
- CPU: ARM Cortex M0
- Communications: infrared, with ir:USER running on the console. Uses obfuscated payloads. Baud rate is 115200 bps.
Memory map:
| Address | Size | Description |
|---|---|---|
| 0x08008000 | 256KB? | Firmware (fangate_updater.bin) |
| 0x20000000 | 128KB? | RAM |
| 0x40023C00 | 0x0000001C | FLASH ROM control |
| 0xE000ED00 | ? | System control block |
IR communications
Samples
NFC adapter update beacon, as sent by the console:
| Raw | Deobfuscated |
|---|---|
A5 00 08 73 FE A5 C4 A4 2C A4 20 F5
|
9A 9D D6 3A 01 E8 00 0C
|
A5 00 08 D1 3E B7 7B B6 91 B6 9D 87
|
38 5D 66 45 01 EA 00 0C
|
A5 00 08 09 58 23 36 22 DA 22 D6 AE
|
E0 3B 2A 6E 01 EC 00 0C
|
A5 00 08 5E DD A4 A0 A5 4E A5 42 A8
|
B7 BE FA 7D 01 EE 00 0C
|
A5 00 08 BC 19 C6 37 C7 C7 C7 CB 8B
|
55 7A 7A 2E 01 F0 00 0C
|
A5 00 08 C9 15 F6 63 F7 91 F7 9D B2
|
20 76 3F 76 01 F2 00 0C
|
A5 00 08 6E 48 47 1A 46 EE 46 E2 C7
|
87 2B 29 52 01 F4 00 0C
|
A5 00 08 A2 8C E5 C3 E4 35 E4 39 74
|
4B EF 47 4F 01 F6 00 0C
|
A5 00 08 26 1C 07 10 06 E8 06 E4 64
|
CF 7F 21 0C 01 F8 00 0C
|
A5 00 08 7E 73 A2 3F A3 C5 A3 C9 FD
|
97 10 DC 4C 01 FA 00 0C
|
A5 00 08 75 00 F3 B8 F2 44 F2 48 63
|
9C 63 86 B8 01 FC 00 0C
|
A5 00 08 8D AC 0F D5 0E 2B 0E 27 72
|
64 CF 82 79 01 FE 00 0C
|
A5 00 08 A3 55 7C 53 7D 52 7D 5E B2
|
4A 36 DF 06 01 01 00 0C
|
A5 00 08 15 06 43 C0 42 C3 42 CF 85
|
FC 65 56 C6 01 03 00 0C
|
A5 00 08 66 E0 9A 17 9B 12 9B 1E A0
|
8F 83 FC F7 01 05 00 0C
|
A5 00 08 A4 35 09 97 08 90 08 9C 25
|
4D 56 AD A2 01 07 00 0C
|
A5 00 08 73 E2 BD AF BC A6 BC AA 60
|
9A 81 CE 4D 01 09 00 0C
|
A5 00 08 02 57 D7 B0 D6 BB D6 B7 28
|
EB 34 D5 E7 01 0B 00 0C
|
A5 00 08 0D 79 01 AA 00 A7 00 AB 22
|
E4 1A 0C D3 01 0D 00 0C
|
A5 00 08 14 91 04 B9 05 B6 05 BA B2
|
FD F2 10 28 01 0F 00 0C
|
A5 00 08 2C 86 B1 49 B0 58 B0 54 C0
|
C5 E5 9D CF 01 11 00 0C
|
A5 00 08 D5 1D DE DB DF C8 DF C4 F9
|
3C 7E 0B C6 01 13 00 0C
|
A5 00 08 AF 75 DE 5C DF 49 DF 45 9C
|
46 16 71 29 01 15 00 0C
|
A5 00 08 C8 E2 5B C6 5A D1 5A DD B5
|
21 81 93 24 01 17 00 0C
|
A5 00 08 9B 51 68 2D 69 34 69 38 41
|
72 32 F3 7C 01 19 00 0C
|
A5 00 08 13 7B 9F EF 9E F4 9E F8 32
|
FA 18 8C 94 01 1B 00 0C
|
A5 00 08 A7 62 02 9C 03 81 03 8D BD
|
4E 01 A5 FE 01 1D 00 0C
|
A5 00 08 39 06 94 36 95 29 95 25 09
|
D0 65 AD 30 01 1F 00 0C
|
A5 00 08 32 4C D7 C0 D6 E1 D6 ED 92
|
DB 2F E5 8C 01 21 00 0C
|
A5 00 08 83 BE F2 8F F3 AC F3 A0 B1
|
6A DD 71 31 01 23 00 0C
|
A5 00 08 83 5E A0 57 A1 72 A1 7E F0
|
6A 3D 23 09 01 25 00 0C
|
A5 00 08 6E C8 AD 69 AC 4E AC 42 D1
|
87 AB C3 A1 01 27 00 0C
|
A5 00 08 C7 33 A1 2C A0 05 A0 09 FC
|
2E 50 66 1F 01 29 00 0C
|