
The only thing left is to execute it: E:\FREEDOS> M620-0~0.EXE On the following picture you can see that Dell BIOS update utility – M620-0~0.EXE is present in the directory. Just put your custom files in FREEDOS folder and after booting you will be able to run them in DOS environment.Īfter boot process is complete run dir command to see what files are in current directory. To add your own files to the iso, just use trial version of Magic ISO Maker (300MB maximum), or some similar program.

Using modified iso image from this page you can boot directly to DOS without need to install anything:

Unfortunately FreeDOS 1.1 LiveCD mode is not supported out of the box. I was struggling with BIOS upgrades for our new Dell servers, as Dell didn’t provide bootable ISO image for BIOS upgrades.Īfter searching for DOS bootable images I have found FreeDOS project.
