Created Other features/notes (markdown)

Other-features-notes.md

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+- Signature checks are always patched. If you're not booting a 9.0/9.2 NAND, the FIRM reboot patch is applied, to allow games which work in the larger RAM mode (Smash Bros, Monster Hunter 4... on Old 3DS, still unused by official software on New 3DS), custom GBA games and old DS flashcards to work.
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+- You can load external ARM9 programs (like Decrypt9) on boot. You need to create a **payloads** directory inside the aurei folder, place a **default.bin** inside of it, and **(optionally)** these other payloads: x.bin, y.bin, select.bin, l.bin, right.bin, left.bin, up.bin, down.bin. default.bin gets launched by holding **START** or if another payload doesn't exist, for the others you need to hold their corresponding button, **except** for r.bin and select.bin which are launched with **L+R** and **L+SELECT** respectively. If you're using a non-screen-init version of A9LH, it will be done automatically before launching the payload.
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+- Booting with arm9loaderhax is **auto-detected**, and **whenever you load SysNAND on A9LH** all FIRMs are automatically patched to **prevent overwriting** A9LH or bricking. This also makes you be able to always safely perform a system update from A9LH.
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+- When a soft (or "MCU") reboot happens (like exiting from System Settings), AuReiNand will remember and force the last used boot mode. This is to easily keep staying on the NAND you booted. To override this, just hold A (which is equivalent to not pressing anything on a fresh boot), or the desired button(s).
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+- Finally, when you quit a GBA game, you'll be forced to SysNAND **in every case** (and you can't override it!). This is important to prevent **loss** of your saves.