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BIOS Boot-CD

Howto: BIOS-Update per bootable CD

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BIOS Boot-CD - Howto: BIOS-Update per bootable CD
BOOT
C D
BIOS

 

A guidance how to create a Boot-CD (MS-DOS v6.22) to perform a BIOS update.

see also: BIOS-Update Howto: step-by-step instruction
see also: BIOS Update per bootable USB-Stick
see also: BIOS Update per DOS-Boot-Diskette

 

Important: this method simulates/emulates a floppy drive. Due to the size limitation of a 2.88MB floppy disk, you can only use a BIOS file and flashtool whose total file size is max ~2.7MB!

Recommendation: i prefer to use the method BIOS Update per bootable USB-Stick!
A bootable pendrive has no size restrictions and more importantly: you can create a BACKUP before updating the BIOS - and that's always a good idea!

 

The following tools are needed:

  • CDBurnerXP - free CD-Burning software, Download from manufacturer's website
    Attention: download the CDBurnerXP-Version without OpenCandy or installCore! (Adware!)
  • UltraISO - Trial version, Download from manufacturer's website
  • Ultimate BIOS-Boot-Edition:
    - msdos.img (the boot image contains only the most important MS-DOS operating system files)
    DOWNLOAD Ultimate BIOS-Boot-Edition - 1.2MB
  • Flashtool - BIOS-Programming-Software (.EXE as file extension), which programs the BIOS file onto the BIOS-Chip, and the BIOS file. Both files must be downloaded:
    - Mainboard, bought in its original box: from the mainboard manufacturer website, or
    - Notebook or brand PC: from the notebook/brand PC manufacturer website.
    Both files must be specially designed for the DOS Operation system! If the manufacturer offers only files for Windows, you have to risk the BIOS update either directly under Windows, or you can re-program your old BIOS-Chip, or purchase a new, programmed BIOS-Chip.

 

New BIOS-Chips (incl. programming) --> in my Shop

 

Instruction to create a bootable CD

  • Tip: use - if possible - a rewritable CD-RW.
  • Open the Ultimate BIOS-Boot-Edition and extract the boot image file (folder boot_cd) msdos.img.
  • Install and start the Trial version of UltraISO.
  • Open the boot image file msdos.img with UltraISO.
  • Rename the filename of your flashtool and the BIOS file, if they have more than 8 characters (not the file extension!).
  • Copy the flashtool and BIOS file (with Drag&Drop) to the other existing files (see picture).
  • Save the boot image file and close UltraISO.
  • Start CDBurnerXP and choose Data disc:
  • Create the text file dummy.txt with any content (1 byte is enough) and drag&drop it to the compilation. (Reason: CDBurnerXP cannot successfully create a CD if there is no file in the compilation)
  • In the CDBurnerXP main menu Disc choose the entry Boot options...
  • In the following window (see picture) enable the checkbox Make disc bootable and insert the path to your boot image file msdos.img.
  • Change the Emulation type to Floppy 2.88MB.
  • Click the OK-Button to close this window.
  • Now you can use Ctrl+B to burn the CD.
The DOS system files are normally invisible, because their file attribute is set to hidden. If you would like to show these hidden files, you have to enable the option: "Windows-Explorer / Tools / Folder options / View / Show hidden files and folders" and to disable the option "Hide protected operating system files".

 

Starting the BIOS-Update from CD-ROM

  • First, go into your BIOS-Setup and change the Bootsequence to CD-ROM (search for an option like Bootsequence, First Boot Device, or something similarly).

  • Insert the CD and restart your PC. If all went well - MS-DOS starts and you can see the famous DOS-Prompt (A:\>).

  • Now you can start the BIOS update, but remember: you can't backup your old BIOS version onto a CD! But if your harddisk has a FAT16- or FAT32 partition, it would be a good idea to copy your 2 BIOS files to this partition, and to start the update/backup from your harddisk.

  • See also: BIOS-Update Howto: step-by-step instruction

Happy flashing!

User-Comments: BIOS Boot-CD
palxgr 11.Jan.2015 14:47

@Hara Mo I have the same problem. Were you able to resolve it? P

Hara Mo 30.Sep.2014 20:03

Dear, I cannot succeed to burn the cd, it says : 'you did not add any files to the compilation. Do you want to burn the disc anyway? I click yes. Allow making changes to the disc later is selected (but tried also 'prevent further changes to the disc(finalize)'. Clicekd burn disc, then an error occured: most likely the disc is not usable, it's a brand new dvd disc, first tried with two old rewritable cd , same error. error detail: Hresult: 0x80040295

Aaron 24.Sep.2014 01:59

Thanks you so much! I was struggling to upgrade my Gigabit P55 motherboard bios as i have 64bit windows 7 and no floppy drive. I tired heaps of ways and couldn't get it to work. Your method above (except the burner software) worked like a charm! Thank you for providing a great community service! Maybe think about adding a "Donate" button to donate through paypal as i certainly would!

max 18.Feb.2014 09:36

happy to know that you will help me

biosflash 15.Oct.2013 15:49

@Bill Meyer
I don't know. Maybe you have made something wrong?

Bill Meyer 15.Oct.2013 15:04

My Acer Aspire 5110 USB ports are unusable. Any USB device connected showing in the device manager as unrecognized, device error 43. I have a slim hope that updating the Bios to the latest version 3.13 will solve the problem. I followed the instructions to make a boot CD/DVD. I copied my bios files to the dos files as shown in your picture and saved it. When I boot up I see the A> prompt as expected. When I list the files on the DVD only see the file "Command.com". If I put another data dsta in the CD rom drive with my Bios files they don't don't show. The disk looks empty. Any thoughts on this..

biosflash 13.Oct.2013 07:50

@vishalshetty104
Yes

vishalshetty104 13.Oct.2013 07:43

Hey i have a 700 mb cd-rw and my total size of the BIOS files (BIOS,AWDFLASH a type of flash tool)is 294 kb... will that be ok to update my BIOS... I downloaded the latest version from asus website the link is here: http://support.asus.com/download.aspx?SLanguage=en&p=1&s=10&m=A7V8X-MX+SE&os=&hashedid=1guVBT1qV5oqhHyZ the latest version of it (1007-001) its in .bin format... CAN IT WORK ??????

Jay 18.Jun.2013 00:57

Thanks but i found a way to do this. I was actually trying to install my original version of bios cause the newer one wasn't working right. To upgrade its simple, just download which version you want to update it to and click it and run it and follow the instructions. The problem comes when trying to install an older version because it won't let you. So you have to either do something like you said or, you have to find another way around that. I was able to do it using a command in command prompt. It forces the bios version you want to run and install. Anyways thanks, this was still educational.

biosflash 17.Jun.2013 22:53

@Jay
Sorry, but most of all stupid Dell PCs don't support a bios flash under DOS. You have to execute the Dell .exe bios update under Windows. Dell also should have a FAQ how to flash your bios.

 
 
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