You can demonstrate that you have found an actual incompatibility between FreeDOS and MS-DOS (rather than a 'belief' that there may exist one, which, in years of being subscribed to the FreeDOS mailing list I have yet to see).

The only way I would ever consider adding this feature is if the following conditions are met:

Rufus cannot be used to create an MS-DOS bootable USB drive except a Windows Millennium one, if you are running Windows 8.1 or earlier, and, because the demand for such a feature is exceedingly small (at this stage, I have to point out that the amount of people who have been able to claim that they have found a genuine flaw in FreeDOS that forces them to use MS-DOS currently stands at exactly zero, as most of the 'issues' that people have with FreeDOS only have to do with a slightly different way to handle AUTOEXEC.BAT/ CONFIG.SYS or menus, which is easily addressed and does not constitute a DOS incompatibility), I have no plans whatsoever to ever add that functionality as I have 100% confidence that FreeDOS can always be used in lieu of MS-DOS. Now, your expectation is that Rufus can create an MS-DOS bootable USB if you provide your own version (as an ISO, or something else). Is it at all possible that the ISO from AllBootDisks is faulty? If it's not the ISO, then how else can I create a bootable flash drive for MS-DOS 6.22?Īs explained here, Rufus does not embed any version of MS-DOS with the application, so it doesn't matter what version of Rufus you use, you won't magically get a specific version but the Windows Millennium DOS version that Windows provides (that is, up to Windows 8.1, since Windows 10 removed it altogether, so there's no MS-DOS creation option in Rufus if running on Windows 10 or later). This image is either non-bootable, or it uses a boot or compression method not supported by Rufus.Īccording to this link, it's not possible at all to use Rufus to create a bootable USB for specific versions of MS-DOS.īy contrast, UNetbootin seems to accept the ISO when creating the bootable USB, but booting into it causes the boot loop described here. which both produce the following error when selecting the ISO: This ISO image doesn't appear to use either.įrom the main Rufus page, I've tested versions:

This version of Rufus only supports bootable ISOs based on 'bootmgr/WinPE' or 'isolinux'. all of which produce the following error when selecting the ISO: I've tested the following versions of Rufus from this link: So far I've tried this ISO in several versions of Rufus and the latest version of UNetbootin. I'm using the ISO for MS-DOS 6.22 found at AllBootDisks. I can't risk using FreeDOS or any other version of DOS because I'm working with a very niche utility that has the potential to break expensive things if things are wrong. I'm trying to create a bootable USB for MS-DOS 6.22.

Partition magic dos boot usb