If you get a scrolling list of “Invalid Opcode” errors when you boot the FreeDOS 1.2 installation CDROM, this is a bug in VirtualBox since we released FreeDOS 1.2. Create Bootable MS-DOS 6.22 CD in Windows 10 Posted on JAuthor Trisha 5 Comments When you have to update the BIOS of an older system, sometimes you have to boot into the old MS-DOS or FreeDOS and then execute the update program. This is the re-release form the China Dos Union from 1996 Identifier dos71cd Scanner Internet Archive HTML5 Uploader 1.6.3 User-contributed yes. Ms-Dos Version 7.1 cd image by Microsoft. Windows’ built-in formatting utility lets you create a DOS-bootable floppy drive, but not a USB drive. DOS isn’t widely used anymore, but you’re still likely at some point to need to boot into a DOS environment.
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