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37C3 - Nintendo hacking 2023: 2008
Nintendo hacking 2023 explores the DSi's boot process, ARM7 and ARM9 CPU I/O access, and glitching techniques to bypass checks and execute custom code, providing insights into the console's hardware and security.
- The DSi’s boot ROM is loaded into SRAM, making it possible to execute code.
- Glitching can be used to bypass the boot ROM’s checks and execute custom code.
- The ARM7 CPU has access to all I/O, while the ARM9 CPU has access to only a subset of I/O.
- The DSi’s boot process involves several stages, including the reset handler, the initialization of the touchscreen and sound, and the loading of the homebrew menu.
- The ARM9 CPU’s boot ROM is different from the ARM7 CPU’s boot ROM, and requires a different approach to glitching.
- The DSi’s boot ROM includes a hash check, which can be bypassed using glitching.
- The ARM7 boot ROM is divided into three sections: the reset handler, the utility routines, and the memory mapping.
- The ARM7 CPU has a RISC core with a write-through cache.
- The DSi’s EMMC chip is used for storing and reading data from the game cartridge.
- The DSI can be revived using a mod chip and custom code.
- The 3DS’s boot ROM includes a hash check, which can be bypassed using glitching.