IO Registers: Difference between revisions

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 =0x10012000=
-Keys seem to be stored here? Access to this region is disabled once the ARM9 writes 0x2 to [[CONFIG|REG_SYSPROT9]]. Before writing that bit, the ARM9 copies the low u32 for the TWL keydata to +0x100 (and high u32 keydata to +0x104 with the New 3DS). On development units ([[CONFIG|UNITINFO]]!=0) ARM9 uses the first 8-bytes from 0x10012000 for the TWL keydata.
+Keys seem to be stored here? Access to this region is disabled once the ARM9 writes 0x2 to [[CONFIG|REG_SYSPROT9]].
-Originally the above TWL keyinit + region disable was done by Kernel9. However, with the [[New_3DS]] FIRM ARM9 binary this is now done in the [[FIRM]] ARM9 binary loader, which also uses the 0x10012000 region for key generation.
+Originally the console-unique TWL keyinit + region disable was done by Kernel9. However, with the [[New_3DS]] FIRM ARM9 binary this is now done in the [[FIRM]] ARM9 binary loader, which also uses the 0x10012000 region for key generation.
+{| class="wikitable" border="1"
+!  Offset
+!  Size
+!  Description
+|-
+| 0x0
+| 0x8
+| On development units ([[CONFIG|UNITINFO]]!=0) ARM9 uses the first 8-bytes from 0x10012000 for the TWL keydata. This doesn't seem to be used by NATIVE_FIRM on retail, besides New3DS key-generation in the [[FIRM|ARM9-loader]].
+|-
+| 0x8
+| 0xF8
+| ?
+|-
+| 0x100
+| 0x8
+| Before writing REG_SYSPROT9 bit1, the ARM9 copies the 8-byte TWL-keydata to here.
+|}