3DS Virtual Console: Difference between revisions
WulfyStylez (talk | contribs) |
WulfyStylez (talk | contribs) AGB NAND savegame format, MAC, etc |
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* Flash V124 was observed 0x90, V131 was observed 0xC0. | * Flash V124 was observed 0x90, V131 was observed 0xC0. | ||
* EEPROM-based games vary wildly, since they can likely specify chip info in the 0x10-region of the footer. | * EEPROM-based games vary wildly, since they can likely specify chip info in the 0x10-region of the footer. | ||
===NAND Savegame=== | |||
AGB_FIRM saves its active save memory to NAND on exit, this is then immediately picked up by NATIVE_FIRM on reboot by checking [[CONFIG_Registers#CFG_BOOTENV|CFG_BOOTENV]]. From there, this is verified and copied out to SD. The savegame format is as follows: | |||
{| class="wikitable" border="1" | |||
|- | |||
! START | |||
! SIZE | |||
! DESCRIPTION | |||
|- | |||
| 0x0 | |||
| 0x4 | |||
| Magic ('.SAV') | |||
|- | |||
| 0x4 | |||
| 0xC | |||
| Always 0xFF | |||
|- | |||
| 0x10 | |||
| 0x10 | |||
| AES-MAC of the SHA256 hash of 0x30..0x200 + the entire save itself, keyslot 0x24, keyY from process9 .rodata | |||
|- | |||
| 0x20 | |||
| 0x10 | |||
| Always 0xFF | |||
|- | |||
|- | |||
| 0x30 | |||
| 0x40 | |||
| Always 0x1? | |||
|- | |||
| 0x34 | |||
| 0x4 | |||
| ? (observed 0x1, may change though) | |||
|- | |||
| 0x38 | |||
| 0x8 | |||
| AGB TitleID | |||
|- | |||
| 0x40 | |||
| 0x10 | |||
| eMMC CID from the console the save was made on (verified on load) | |||
|- | |||
| 0x50 | |||
| 0x4 | |||
| Save start addr (always 0x200) | |||
|- | |||
| 0x54 | |||
| 0x4 | |||
| Save size | |||
|- | |||
| 0x58 | |||
| 0x8 | |||
| Always 0xFF (?) | |||
|- | |||
| 0x60 | |||
| 0x4 | |||
| See [[ARM7_Registers|here]] | |||
|- | |||
| 0x64 | |||
| 0x4 | |||
| See [[ARM7_Registers|here]] | |||
|- | |||
| 0x68 | |||
| 0x198 | |||
| Always 0xFF | |||
|} | |||