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RE'd from GameCardWriter
=Header=
= Header =
The header is 0x200-bytes, at Gamecard+0.
The header is 0x200-bytes at offset 0 in the Gamecard.
{| class="wikitable" border="1"
{| class="wikitable" border="1"
| 0x0
| 0x0
| 0x100
| 0x100
| RSA-2048 PKCS #1 signature over the data from 0x100 - 0x200.
| RSA-2048 PKCS #1 signature over the XCI header (data from 0x100 to 0x200)
|-
|-
| 0x100
| 0x100
| 0x104
| 0x104
| 0x4
| 0x4
| Offset of Secure partition (Size of non-secure data?), in Media Units (0x200 bytes for switch gamecarts)
| Write Size (size of non-secure data in Media Units which are 0x200 bytes)
|-
|-
| 0x108
| 0x108
| 0x10D
| 0x10D
| 0x1
| 0x1
| Cartridge Size. 0xF8 = 2 GB, 0xF0 = 4 GB, 0xE0 = 8 GB, 0xE1 = 16 GB, 0xE2 = 32 GB
| Gamecard Type (0xFA = 1GB, 0xF8 = 2GB, 0xF0 = 4GB, 0xE0 = 8GB, 0xE1 = 16GB, 0xE2 = 32GB)
|-
|-
| 0x10E
| 0x10E
| 0x10F
| 0x10F
| 0x1
| 0x1
| ?
| Gamecard Options (bit0 = AutoBoot, bit1 = HistoryErase)
|-
|-
| 0x110
| 0x110
| 0x118
| 0x118
| 0x8
| 0x8
| Size of the Gamecart, in Media Units
| Gamecard Size (in Media Units which are 0x200 bytes)
|-
|-
| 0x120
| 0x120
| 0x10
| 0x10
| ?
| Gamecard Initial Data IV (reversed)
|-
|-
| 0x130
| 0x130
| 0x8
| 0x8
| Offset of HFS0 FS partition
| HFS0 partition offset
|-
|-
| 0x138
| 0x138
| 8
| 0x8
| HFS0 Header size
| HFS0 header size
|-
|-
| 0x140
| 0x140
| 0x18C
| 0x18C
| 0x4
| 0x4
| Offset of Secure partition (Size of non-secure data?), in Media Units, again.
| Duplicate Write Size (size of non-secure data in Media Units which are 0x200 bytes)
|-
|-
| 0x190
| 0x190
| 0x70
| 0x70
| Encrypted data/hashes of some kind
| Gamecard Initial Data (AES-128-CBC encrypted)
|}
|}
= Cert =
= Cert =
This is for the CERT, located at Gamecard + 0x7000 (always?). This matches exactly the output from fsp-srv IDeviceOperator cmd 206 "GetGameCardDeviceCertificate".
This is for the CERT, located at Gamecard + 0x7000 (always?). This matches exactly the output from fsp-srv IDeviceOperator cmd 206 "GetGameCardDeviceCertificate".
The string table is 00-padded to align the start of raw filedata with a sector/media unit boundary (usually?).
The string table is 00-padded to align the start of raw filedata with a sector/media unit boundary (usually?).
=Typical Cartridge Layout=
= Typical Cartridge Layout =
Observed gamecarts contain three partitions: "update", "normal", and "secure".
Observed gamecards contain three partitions: "update", "normal", and "secure".
The update partition (Gamecard partition 0 for fsp-srv cmd 31) contains .cnmt.nca + .nca files for the entire system update required to play the game. Launch day carts contain a full copy of 1.0 ncas, newer carts contain newer sysupdate NCAs etc.
The update partition (Gamecard partition 0 for fsp-srv cmd 31) contains .cnmt.nca + .nca files for the entire system update required to play the game. Launch day carts contain a full copy of 1.0 ncas, newer carts contain newer sysupdate NCAs etc.
The entire rest of the gamecard after the secure partition ends is all FF padding.
The entire rest of the gamecard after the secure partition ends is all FF padding.
[4.0.0+] The "normal" partition is now empty and a new partition "logo" was added.