Change the Emulation type to Floppy 2.88MB.In the following window (see picture) enable the checkbox Make disc bootable and insert the path to your boot image file msdos.img.In the CDBurnerXP main menu Disc choose the entry Boot options.(Reason: CDBurnerXP cannot successfully create a CD if there is no file in the compilation) Create the text file dummy.txt with any content (1 byte is enough) and drag&drop it to the compilation.Save the boot image file and close UltraISO.Copy the flashtool and BIOS file (with Drag&Drop) to the other existing files (see picture).Rename the filename of your flashtool and the BIOS file, if they have more than 8 characters (not the file extension!).Open the boot image file msdos.img with UltraISO.
Notebook or brand PC: from the notebook/brand PC manufacturer website.īoth 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. Mainboard, bought in its original box: from the mainboard manufacturer website, or Flashtool - BIOS-Programming-Software (.EXE as file extension), which programs the BIOS file onto the BIOS-Chip, and the BIOS file.msdos.img (the boot image contains only the most important MS-DOS operating system files)ĭOWNLOAD Ultimate BIOS-Boot-Edition - 1.2MB UltraISO - Trial version, Download from manufacturer's website.CDBurnerXP - free CD-Burning software, Download from manufacturer's websiteĪttention: download the CDBurnerXP-Version without OpenCandy or installCore! (Adware!).Recommendation: i prefer to use the method BIOS Update per bootable USB-Stick!Ī 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! 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! Important: this method simulates/emulates a floppy drive.