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Line 1: − [[File:Gamecard.jpg|thumb|right|A 3DS gamecard]] − [[File:GamecardPhy.jpg|thumb|right|Close-up of PCB]] − ===Physical interface=== − The 3DS gamecards have the same physical interface as regular DS and DSi gamecards. There is only a minor cosmetic difference in the plastic case, which has a small extruding notch on the top-right side. As such, it prevents insertion of the gamecard into old Nintendo DS or DSi systems. − − When modifying the case so that the 3DS gamecard fits in a DS or DSi system, those systems will refuse to detect the gamecard and show no banner icon. − − {| class="wikitable" border="1" − |- − ! Pin − ! Name − ! Description − |- − | 1 − | GND − | Ground − |- − | 2 − | CLK − | Clock. Frequencies 6.7MHz and 4.2MHz) − |- − | 3 − | NC − | Not connected. Possibly used to program cards. − |- − | 4 − | RCS − | ROM select, active low. Pulled low to start a ROM transfer. − |- − | 5 − | RST − | Reset, active low. − |- − | 6 − | ECS − | Savegame chip select, active low. Pulled low to start a savegame SPI transfer. − |- − | 7 − | IRQ − | Removal detection. − |- − | 8 − | VCC − | Powersupply 3.3V. − |- − | 9 − | DAT0 − | Bidirectional data bus. − |- − | 10 − | DAT1 − | Bidirectional data bus. − |- − | 11 − | DAT2 − | Bidirectional data bus. − |- − | 12 − | DAT3 − | Bidirectional data bus. − |- − | 13 − | DAT4 − | Bidirectional data bus / pin ? to savegame chip{{check}} − |- − | 14 − | DAT5 − | Bidirectional data bus / pin ? to savegame chip{{check}} − |- − | 15 − | DAT6 − | Bidirectional data bus / SPI data from savegame chip. − |- − | 16 − | DAT7 − | Bidirectional data bus / SPI data to savegame chip. − |- − | 17 − | GND − | Ground − |} − − ===SPI flash=== − So far, only one savegame FLASH chip has been identified. The chip identifies as a 0xC22211. The JEDEC manufacturer ID is Macronix, and despite the chip label saying 25L1001 it is actually an MX25L1021E. Datasheet at: http://www.macronix.com/QuickPlace/hq/PageLibrary4825740B00298A3B.nsf/h_Index/3F21BAC2E121E17848257639003A3146/$File/MX25L1021E,%203V,%201Mb,%20v0.01.pdf. − − ===Protocol=== − The communication protocol between the 3DS system and the 3DS gamecard has changed almost completely in comparison with the DS and DSi gamecard communication protocol. − − After the sixth transfer, commands change size from 8 bytes to 16 bytes. Possibly a new encryption is used, such as AES CTR. − − Here's a set of sample gamecard commands that a 3DS sends to a 3DS gamecard: − − {| class="wikitable" border="1" − |- − ! Size − ! Command − ! Description − |- − |2000 − |9F00000000000000 − | Reset − |- − |0000 − |71C93FE9BB0A3B18 − | Unknown − |- − |0004 − |9000000000000000 − | Get gamecard ID, response=9000FEC2 − |- − |0004 − |9000000000000000 − | Get gamecard ID, response=9000FEC2 − |- − |0004 − |A000000000000000 − | Unknown, response=00000000 − |- − |0000 − |3E00000000000000 − | Enter 16-byte command mode. − |- − |07EC − |82000000000000000000000000000000 − | Get header − |- − |05E3 − |F32C92D85C9D44DED3E0E41DBE7C90D9 − | Encrypted, unknown − |- − |0332 − |696B9D8582FB55D31B68CAFE70C74A95 − | Encrypted, unknown − |- − |0332 − |BAA4812CA0AC9C5D19399530E3ACCCAB − | Encrypted, unknown − |- − |032E − |178E427C22D87ADB86387249A97D321A − | Encrypted, unknown − |- − |0332 − |E06019B1BD5C9130ED6A4D9F4A9E7193 − | Encrypted, unknown − |- − |0332 − |4E0D224862523BBFE2E6255F80E15F37 − | Encrypted, unknown − |- − |0332 − |4CDF93D319FB62D0DB632A45E3E8D84C − | Encrypted, unknown − |- − |0332 − |9AA5D80551002F955546D296A57F0FEF − | Encrypted, unknown − |- − |0332 − |C12BA81AEF30DDDBD93FAD5D544C6334 − | Encrypted, unknown − |- − |0532 − |62EC5FB7F420AE1DC6253AE18AFA5BB3 − | Encrypted, read address 0 − |- − |0332 − |E3FA23AA016BE0C93430D1F42FF41324 − | Encrypted, read address 0x4000 − |} − − The header command has some initial dummy bytes, and eventually responds with a 0x200 byte header. Here's an example for Lego Starwars 3: − 0000000: 00 8c 03 00 00 00 04 00 00 00 00 00 00 00 00 00 ................ − 0000010: b3 cf fb c6 6a b1 cb 20 32 af ce 35 d4 1c 74 c9 ....j.. 2..5..t. − 0000020: 8e 6b 27 2f 08 01 28 3b d4 30 de 44 37 f5 b0 46 .k'/..(;.0.D7..F − 0000030: 91 59 d7 38 33 48 df 83 fd 71 84 2c 00 00 00 00 .Y.83H...q.,.... − 0000040: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ − 0000050: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ − 0000060: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ − 0000070: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ − 0000080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ − 0000090: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ − 00000a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ − 00000b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ − 00000c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ − 00000d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ − 00000e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ − 00000f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ − 0000100: 4e 43 43 48 7a 7f 0e 00 00 8c 03 00 00 00 04 00 NCCHz........... − 0000110: 36 34 02 00 00 00 00 00 00 8c 03 00 00 00 04 00 64.............. − 0000120: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ − 0000130: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ − 0000140: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ − 0000150: 43 54 52 2d 50 2d 41 4c 47 50 00 00 00 00 00 00 CTR-P-ALGP...... − 0000160: 0c 27 e3 c1 de 7b 2a e2 d3 11 4f 32 a4 ee bf 46 .'...{*...O2...F − 0000170: 9a fd 0c f3 52 c1 1d 49 84 c2 a9 f1 d2 14 4c 63 ....R..I......Lc − 0000180: 00 04 00 00 00 00 00 00 00 00 00 00 01 03 00 00 ................ − 0000190: 05 00 00 00 01 00 00 00 00 00 00 00 00 00 00 00 ................ − 00001a0: 06 00 00 00 1c 0a 00 00 01 00 00 00 00 00 00 00 ................ − 00001b0: 22 0a 00 00 58 75 0e 00 01 00 00 00 00 00 00 00 "...Xu.......... − 00001c0: 13 0c 04 26 15 f6 47 c4 c6 32 25 ea 9e 67 f8 a2 ...&..G..2%..g.. − 00001d0: 7b 15 24 6b 88 fb c7 a9 27 25 7b 84 97 7b 78 7b {.$k....'%{..{x{ − 00001e0: a6 5b ee 10 60 bb 6a 68 21 bb ce c6 00 03 5b 7e .[..`.jh!.....[~ − 00001f0: 64 fb 6e ac a7 f0 96 0c fb 1f 5a 37 08 77 28 f7 d.n.......Z7.w(.
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