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== 0x10010000 ==
== 0x10010000 ==
NATIVE_FIRM writes value 1 here when a FIRM launch begins.
Initially this is value zero. NATIVE_FIRM writes value 1 here when a FIRM launch begins. The [[Legacy_FIRM_PXI|LGY]] FIRM writes value 3 here when handling PXI command 0x00020080(first TWL PXI command), it also writes value 7 here when handling PXI command 0x00030080(first AGB PXI command). This register can be read to determine what "mode" the system is running under: hard-boot, FIRM launch, or TWL/AGB FIRM.
== REG_UNITINFO ==
== REG_UNITINFO ==
This 8-bit register is value zero for retail, non-zero for dev/debug units.
This 8-bit register is value zero for retail, non-zero for dev/debug units.