NATIVE_FIRM is the FIRM which is installed to the [[Flash_Filesystem|NAND]] firm partitions, which is loaded by bootrom. SAFE_MODE_FIRM and NATIVE_FIRM for the initial versions are exactly the same, except for the system core version fields. SAFE_MODE is used for running the [[System_Settings#System_Updater|System Updater]].
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== TWL_FIRM and AGB_FIRM ==
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TWL_FIRM handles DS(i) backwards compatibility, while AGB_FIRM handles running GBA VC titles. The ARM9 FIRM section for TWL_FIRM and AGB_FIRM are exactly the same(for TWL_FIRM and AGB_FIRM versions which were updated with the same system-update).