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edits
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Removed boot0 stuff
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−== Stage 1 ==
−[[Image:boot-stage1-error.jpeg|frame|When the Stage 1 bootloader (in ROM) fails, it displays a 32-bit hexadecimal number on the top screen.]]
−The first stage of the DSi's bootloader lives in ROM, presumably on the CPU die. It loads further encrypted+signed stages from [[NAND]] flash, starting with a plaintext offset table in the sector at offset 0x200.
−Not much is known about this bootloader yet, but it presumably knows how to:
−# Initialize the encryption hardware
−# Read the contents of [[NVRAM]]
−# Initialize both LCDs
−# Read blocks (but not files) from the [[NAND]] flash
−# Perform some variety of integrity check on all data it reads (signature, CRC, ?)
−# Display basic hexadecimal error codes
−# Possibly factory-programming the [[NAND]] flash?
−# Might also do basic power-on self test of peripherals
−Known error codes:
−{| border="1" cellpadding="3" cellspacing="0"
−! Error Code !! Description
−|-
−| 0000FE00 || Error communicating with NAND chip. (It's missing, CLK is shorted, etc.)
−|-
−| 0000FEFC || Integrity error in first block of Stage 2 (address at 0x220)
−|-
−| 0000FEFD || Integrity error in second block of Stage 2 (address at 0x230)
−|-
−| 0000FEFE || Boot sector integrity error (Sector 0x200 not valid), or error in [[NVRAM]] contents.
−|}
−== Stage 2 ==
−
[[Image:boot-stage2-error.jpeg|frame|This may have been a Stage 2 bootloader error.]]
[[Image:boot-stage2-error.jpeg|frame|This may have been a Stage 2 bootloader error.]]