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  2. Master boot record - Wikipedia

    en.wikipedia.org/wiki/Master_boot_record

    Some MBR code loads additional code for a boot manager from the first track of the disk, which it assumes to be "free" space that is not allocated to any disk partition, and executes it. A MBR program may interact with the user to determine which partition on which drive should boot, and may transfer control to the MBR of a different drive.

  3. Windows Boot Manager - Wikipedia

    en.wikipedia.org/wiki/Windows_Boot_Manager

    On system with BIOS firmware, the BIOS invokes MBR boot code from a hard disk drive at startup. The MBR boot code and the VBR boot code are OS-specific. In Microsoft Windows, the MBR boot code tries to find an active partition (the MBR is only 512 bytes), then executes the VBR boot code of an active partition.

  4. Memory buffer register - Wikipedia

    en.wikipedia.org/wiki/Memory_buffer_register

    A data item will be copied to the MBR ready for use at the next clock cycle, when it can be either used by the processor for reading or writing, or stored in main memory after being written. This register holds the contents of the memory which are to be transferred from memory to other components or vice versa.

  5. Bootloader - Wikipedia

    en.wikipedia.org/wiki/Bootloader

    In x86 computers, a first-stage bootloader is a compact 512-byte program that resides in the master boot record (MBR) and executes when a computer starts. Running in 16-bit real mode at address 0x7C00, it performs minimal hardware initialization, sets up a basic execution environment, and locates the second-stage bootloader.

  6. EasyBCD - Wikipedia

    en.wikipedia.org/wiki/EasyBCD

    EasyBCD has a number of bootloader-related features that can be used to repair and configure the bootloader. From the "Manage Bootloader" section of EasyBCD, it is possible to switch between the BOOTMGR bootloader (used since Windows Vista) and the NTLDR bootloader (used by legacy versions of Windows, from Windows NT to Windows XP) in the MBR from within Windows by simply clicking a button.

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  8. Booting - Wikipedia

    en.wikipedia.org/wiki/Booting

    In the case of a hard disk, this is referred to as the Master Boot Record (MBR). The conventional MBR code checks the MBR's partition table for a partition set as bootable [nb 5] (the one with active flag set). If an active partition is found, the MBR code loads the boot sector code from that partition, known as Volume Boot Record (VBR), and ...

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