Bios Xbox 360
Xbox 360 BIOS and Firmware: A Deep Dive into System Architecture and Modding
You cannot change settings like boot order, clock speeds, or memory timings like on a PC.
Never download a pre-packaged "Xbox 360 BIOS.zip" from untrusted sources.
Legally, you must dump your own console's NAND using a hardware programmer. bios xbox 360