19
edits
Changes
Jump to navigation
Jump to search
Line 27:
Line 27: − + + Line 34:
Line 35: + +
boot9strap allows code bootROM code execution, but this is not normal behaviour. The NTR path is just another path to boot a FIRM.
=== How does Nintendo reflash bricked systems? ===
=== How does Nintendo reflash bricked systems? ===
'''Background:''' The boot ROM will boot from SPI flash if the FIRM partitions are both corrupt. But if, say, Home Menu gets deleted, the system is dead, and boot ROM would still see the NAND as valid. How does Nintendo's refurbishing center reflash such systems?
'''Theory:''' Before trying to boot from NAND, the bootrom checks to see if a key combination (Start + Select + X) is being held, and whether the shell is closed. If so, it tries to boot from an inserted NTR (Nintendo DS) cartridge.
This allows to execute a FIRM that is probably used by Nintendo to reflash the system.
== Software ==
== Software ==
=== What did SVC 0x74 in the ARM11 kernel do before it got stubbed? ===
=== What did SVC 0x74 in the ARM11 kernel do before it got stubbed? ===
=== What is the PTM abbreviation? ===
=== What is the PTM abbreviation? ===
: Power/time management
=== Why is the DTCM not used anywhere except bootrom? ===
=== Why is the DTCM not used anywhere except bootrom? ===
'''Background:''' Bootrom is known to use part of DTCM as state, memsetting it to 0 when it's done. After that, it is never used again.
'''Background:''' Bootrom is known to use part of DTCM as state, memsetting it to 0 when it's done. After that, it is never used again.