The following tools are needed:
- CDBurnerXP - free CD-Burning software, Download from manufacturer's website
- UltraISO - Trial version, Download from manufacturer's website
- Ultimate BIOS-Boot-Edition:
- drdos.img (the boot image file contains the 3 DR-DOS system files command.com, ibmbio.com und ibmdos.com)
download [1] Ultimate BIOS-Boot-Edition - 5.9MB
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) drdos.img.
- Install and start the Trial version of UltraISO.
- Open the boot image file drdos.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:
- 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 drdos.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
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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).
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Insert the CD and restart your PC. If all went well - DR-DOS starts and you can see the famous DOS-Prompt (A:\>).
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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.
