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System BIOS or Main BIOS

A firmware used to perform hardware initialization during the booting process (power-on startup), and provides runtime services for operating systems and programs.

EC Firmware

A firmware for embedded controller chip or Super I/O Controller which is responsible for controlling low-bandwith I/O devices such as keyboard, mouse, thermal controller, charging/discharging of battery, laptop’s power sequence, etc.

ME/TXE Region

Intel Management Engine (ME) is an autonomouse subystem that has been incorporated in all of Intel’s proccessor chipsets starting in 2008.

SPI Dump (Bios Dump)

These are firmware that are dumped from laptop’s SPI Chips. SPI dumps are classified into three categories - EC firmware dump, System Bios or sometimes ME Region dump.

Stock Firmware

This is an untouched and unmodified firmware that comes directly from manufacturer website. It can be an EC firmware or System BIOS.

BIOS Region

Bios region is one of the most critical region of a UEFI firmware. OEM customization and vendor-specific drivers are inside this region.


Common extension name for EC/System Bios firmware. Other filenames are CAP, WPH, FL1, FL2,, etc. Asus uses bios version as extension name.