NCSD: Difference between revisions

Line 269:

The CardDeviceReserved areas have random-looking data whose purpose is unknown, other than perhaps to hide the TitleKey.

Note that a particular flashcard vendor puts what many refer to as "private headers" ~~here~~ in place of actual development card information. This header ~~is constituted by a~~ cartridge-~~unique ID~~ obtained ~~from~~ [[Process_Services_PXI|pxi:ps9::GetRomId]] ~~and the title~~-~~unique cart ID~~ (~~identical for~~ all ~~carts~~ of the ~~same title;~~ can be ~~retrieved using~~ the ~~NTR gamecard protocol command 0x90 or through~~ the ~~CTR protocol commands 0x90 or 0xA2)~~.

Note that a particular flashcard vendor, namely Gateway, puts what many refer to as "private headers" at CardDeviceReserved1 in place of actual development card information. This header consists of:

{| class="wikitable" border="1"

|-

! OFFSET

! SIZE

! DESCRIPTION

|-

| 0x0

| 0x40

| Unique cartridge ID; only the first 0x10 bytes are meaningful, the rest are 0xff; obtainable using encrypted [[Gamecards|16-byte cartridge command]] 0xc6; the first 0x10 bytes can also be obtained in userland via [[Process_Services_PXI|pxi:ps9::GetRomId]]

|-

| 0x40

| 0x4

| Cartridge ID1; obtainable using 8-byte cartridge command 0x90 or 16-byte cartridge command 0xa2 or in userland via

|-

| 0x44

| 0x4

| Cartridge ID2; obtainable using 8-byte cartridge command 0xa0 or 16-byte cartridge command 0xa4

|-

| 0x48

| 0x8

| Padding (all-0xff)

|}

The legitimacy of the unique cartridge ID can be validated by online services.

Some dumping tools, notably GodMode9 as of 2024-05-26, erroneously always write 0x00000000 into the position of the Cartridge ID2. This is presumably because the cartridge ID2 is always zero for retail carts.

=== InitialData ===

@@ Line 269: / Line 269: @@
 The CardDeviceReserved areas have random-looking data whose purpose is unknown, other than perhaps to hide the TitleKey.
-Note that a particular flashcard vendor puts what many refer to as "private headers" here in place of actual development card information. This header is constituted by a cartridge-unique ID obtained from [[Process_Services_PXI|pxi:ps9::GetRomId]] and the title-unique cart ID (identical for all carts of the same title; can be retrieved using the NTR gamecard protocol command 0x90 or through the CTR protocol commands 0x90 or 0xA2).
+Note that a particular flashcard vendor, namely Gateway, puts what many refer to as "private headers" at CardDeviceReserved1 in place of actual development card information. This header consists of:
+{| class="wikitable" border="1"
+|-
+!  OFFSET
+!  SIZE
+!  DESCRIPTION
+|-
+|  0x0
+|  0x40
+|  Unique cartridge ID; only the first 0x10 bytes are meaningful, the rest are 0xff; obtainable using encrypted [[Gamecards|16-byte cartridge command]] 0xc6; the first 0x10 bytes can also be obtained in userland via [[Process_Services_PXI|pxi:ps9::GetRomId]]
+|-
+|  0x40
+|  0x4
+|  Cartridge ID1; obtainable using 8-byte cartridge command 0x90 or 16-byte cartridge command 0xa2 or in userland via
+|-
+|  0x44
+|  0x4
+|  Cartridge ID2; obtainable using 8-byte cartridge command 0xa0 or 16-byte cartridge command 0xa4
+|-
+|  0x48
+|  0x8
+|  Padding (all-0xff)
+|}
+The legitimacy of the unique cartridge ID can be validated by online services.
+Some dumping tools, notably GodMode9 as of 2024-05-26, erroneously always write 0x00000000 into the position of the Cartridge ID2. This is presumably because the cartridge ID2 is always zero for retail carts.
 === InitialData ===