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BIOS/UEFI (Basic Input/Output System / Unified Extensible Firmware Interface)

Hexa Guard February 06, 2025
  • Role: The BIOS/UEFI is responsible for initializing the system hardware, including CPU, RAM, storage devices, and peripheral devices.
  • Key Tasks:
    • Power-on Self Test (POST): The system performs diagnostic tests to ensure that the essential hardware components (e.g., RAM, CPU, keyboard, etc.) are functioning correctly.
    • System Configuration: BIOS/UEFI checks system settings (like boot order) configured in the firmware.
    • Bootloader Selection: BIOS/UEFI searches for a bootable device (hard drive, USB, CD/DVD) based on the boot priority order set in the firmware.

If UEFI is used, it operates in a more modern and flexible way, supporting secure boot, GPT (GUID Partition Table), and faster boot times compared to the legacy BIOS.

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