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  1. To boot DOS from USB, you need to create a DOS bootable USB1. Here are the steps to create a DOS bootable USB using Rufus:
    1. Download and launch Rufus.
    2. Select your USB flash drive from the Device drop down.
    3. Choose the FreeDOS option under Boot selection.
    4. Press START to create a DOS bootable USB.
    Alternatively, you can change the boot sequence in your BIOS-Setup to USB-Stick/Drive2. Once you have done this, insert the USB-Stick and restart your PC. If all went well, MS-DOS starts and you can see the famous DOS-Prompt ( C:> )2. The FreeDOS kernel doesn’t support USB drives on its own, so when you boot from a USB drive, the CSM makes it available through the BIOS 13h services, so it appears to DOS as a “standard” drive and everything works fine3.
    Learn more:

    How to Boot DOS from USB using Rufus

    • Download and launch the program.
    • (1) Select your USB flash drive from the Device drop down. (2) Choose the FreeDOS option under Boot selection. (3) Press START to Create a DOS bootable USB.

    Boot DOS from USB - RUFUS Bootable D…

    www.pendrivelinux.com/boot-dos-from-usb/
    • First, go into your BIOS-Setup and change the Bootsequence to USB-Stick/Drive (search for an option like Bootsequence, First Boot Device, or something similarly).

    Howto: BIOS-Update per bootable USB-S…

    www.biosflash.com/e/bios-boot-usb-stick.htm
    The FreeDOS kernel doesn’t support USB drives on its own. When you boot from a USB drive, the CSM makes it available through the BIOS 13h services, so it appears to DOS as a “standard” drive and everything works fine.

    Accessing a USB drive from DOS - Retroc…

    retrocomputing.stackexchange.com/questions/884…
  2. People also ask
    How do I update my BIOS on Windows 10?
    You copy the BIOS file to a USB drive, reboot your computer, and then enter the BIOS or UEFI screen. From there, you choose the BIOS-updating option, select the BIOS file you placed on the USB drive, and the BIOS updates to the new version.

    How to Check Your BIOS Version and Update it - How-To Geek

    howtogeek.com
    What is a BIOS in Windows 10?
    The BIOS, which stands for Basic In Output System, is a critical bit of low-level code stored in nonvolatile memory that your computer uses to manage your hardware and load Windows 10 or another operating system.

    BIOS/UEFI Setup Guide: Boot from a CD, DVD, USB Drive or SD Card

    groovypost.com
    How do I access UEFI options in the BIOS?
    To access and configure UEFI options in your computer’s BIOS, follow these steps: 1. Start by restarting your computer and repeatedly pressing the key specified on your screen to access the BIOS setup. This key is usually Del, F2, F10, or Esc. 2. Once in the BIOS setup, use the arrow keys on your keyboard to navigate through the various options.

    How Do I Boot from USB in UEFI Mode: A Step-by-Step Guide

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    Does Windows 10 have a BIOS boot option?
    Each computer, whether it’s a Dell, HP, Acer or even a custom-built system, is an island unto itself before Windows 10 (or some other operating system) starts. Since the 1980s, hardware vendors have worked together to standardize around common access routines and commands for managing your BIOS Boot Options.

    BIOS/UEFI Setup Guide: Boot from a CD, DVD, USB Drive or SD Card

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  3. pcniki.com
    https://pcniki.com/gigabyte-bios-dos-update

    FreeDOSを利用してGIGABYTE製マザーボードのBIOS ...

  4. techyoulike.com
    https://techyoulike.com/how-do-i-boot-from-usb-in-uefi-mode

    How Do I Boot from USB in UEFI Mode: A Step-by-Step Guide

  5. Super User
    https://superuser.com/.../create-bootable-usb-flash-drives

    windows - Create bootable USB flash drives - Super User

  7. MiniTool
    https://www.partitionwizard.jp/.../uefi-boot-usb.html

    UEFIブート可能なUSBを作成し、それを使ってコンピューターを ...

    UEFIブートモードとは？
    UEFIブートモードは、PCの高度なファームウェアの上で動作することができるブートモードの一種です。UEFIは、従来のレガシーBIOSと比較して、起動プロセスの高速化、プライマリパーティションの増加、より安全な起動など、多くの利点があることが明らかになっています。
    UEFIブートモードを有効にするには？
    UEFIブートモードを有効にするには、BIOSセットアップユーティリティにアクセスしてから、さらに操作する必要があります。その方法は以下の通りです。コンピューターの起動時にF10キーとESC（またはDelete）キーを押して、BIOSセットアップユーティリティを開きます。「Boot」タブを開き...
    Windows 10でEFIパーティションを削除するには？
    EFIパーティションはハードドライブ上のシステムであり、保護されているため、ディスクの管理では削除できません。削除するには、Diskpartを使って基本データパーティションに変換する必要があります。また、専用のソフトウェアを使ってEFIパーティションを削除することもできます。
    USBからWindows 10を起動するには？
    Windows 10のブータブルUSBを用意して、次の手順に従います。USBメモリをコンピューターに接続します。適切なキーを押して、BIOSメニューに入ります。USBメモリが最初に起動するように設定し、変更を保存します。コンピューターを再起動します。
  8. Microsoft Community
    https://techcommunity.microsoft.com/t5/windows-11/how-to...

    How to make a DOS bootable flash drive - Microsoft ...

    Tags:
    Hub
    Microsoft
  9. NEC LAVIE公式サイト
    https://www.nec-lavie.jp/products/contents/bios.html

    BIOS（バイオス）とは？UEFIとの違い、起動方法、初期化など ...

    Tags:
    BIOS
    NEC
  10. Linus Tech Tips
    https://linustechtips.com/topic/1537681-how-do-i-update...

    How do I update BIOS using MS-DOS? - Linus Tech Tips

    Tags:
    Linus Torvalds
    Microsoft Windows
  11. groovyPost
    https://www.groovypost.com/howto/bios-uefi-setup-guide...

    BIOS/UEFI Setup Guide: Boot from a CD, DVD, USB Drive …

    Tags:
    Setup
    DVD
  12. ソフトアンテナ
    https://softantenna.com/blog/rufus-4-1-released

    Rufus 4.1がリリース - MS-DOSドライブの作成機能の追加や ...

  13. How-To Geek
    https://www.howtogeek.com/196916/how-to-check-your-bios...

    How to Check Your BIOS Version and Update it

    Tags:
    Bios Version Checker
    Bios Update Check
    Check Bios Version in Bios

  15. Images of BIOS DOS USB

    bing.com/images
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