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Created page with "The Gamecard ASIC (known internally as the LOTUS3) is a separate chip on the motherboard responsible for communicating with the Gamecard. = Firmware = Filesystem_servic..."
The Gamecard ASIC (known internally as the LOTUS3) is a separate chip on the motherboard responsible for communicating with the [[Gamecard]].
= Firmware =
[[Filesystem_services|FS]] provides the appropriate Gamecard ASIC's user firmware (Lotus ASIC Firmware or LAFW) which is encrypted, signed and follows the format below.
{| class="wikitable" border="1"
|-
! Offset
! Size
! Description
|-
| 0x0
| 0x100
| RSA-PKCS#1 signature
|-
| 0x100
| 0x4
| Magic ("LAFW")
|-
| 0x104
| 0x4
| Unknown (0xFF000000, 0xFFFF0000 or 0xFFFFFF00)
|-
| 0x108
| 0x4
|
|-
| 0x10C
| 0x4
|
|-
| 0x110
| 0x4
| Version (0, 1 or 3)
|-
| 0x114
| 0x4
| Unknown (0x80000000)
|-
| 0x118
| 0x4
| Data size
|-
| 0x11C
| 0x4
|
|-
| 0x120
| 0x10
| Data hash
|-
| 0x130
| 0x10
| Placeholder string ("IDIDIDIDIDIDIDID")
|-
| 0x140
| 0x40
| Empty
|-
| 0x180
| 0x7680
| Encrypted data
|}
= Firmware =
[[Filesystem_services|FS]] provides the appropriate Gamecard ASIC's user firmware (Lotus ASIC Firmware or LAFW) which is encrypted, signed and follows the format below.
{| class="wikitable" border="1"
|-
! Offset
! Size
! Description
|-
| 0x0
| 0x100
| RSA-PKCS#1 signature
|-
| 0x100
| 0x4
| Magic ("LAFW")
|-
| 0x104
| 0x4
| Unknown (0xFF000000, 0xFFFF0000 or 0xFFFFFF00)
|-
| 0x108
| 0x4
|
|-
| 0x10C
| 0x4
|
|-
| 0x110
| 0x4
| Version (0, 1 or 3)
|-
| 0x114
| 0x4
| Unknown (0x80000000)
|-
| 0x118
| 0x4
| Data size
|-
| 0x11C
| 0x4
|
|-
| 0x120
| 0x10
| Data hash
|-
| 0x130
| 0x10
| Placeholder string ("IDIDIDIDIDIDIDID")
|-
| 0x140
| 0x40
| Empty
|-
| 0x180
| 0x7680
| Encrypted data
|}