1. Extract the boot sector: From the first floppy image (DISK1.IMG), extract the boot sector using WinImage (Menu → Image → Boot Sector Properties → Save).
2. Create a folder structure:
3. Add utilities:
4. Generate the ISO (Linux/macOS command):
mkisofs -b boot_sector.bin -no-emul-boot -boot-load-size 4 -o msdos622_custom.iso CD_ROOT/
5. Test it: Boot the ISO in VirtualBox (disable EFI, use legacy BIOS). download ms dos 6.22 bootable iso
If you search for this term, you will encounter two main sources. Here is how they stack up:
Random "Driver" Sites / "Download" Portals (Avoid): took the three floppy images
AllBootDisks / MajorGeeks:
That’s where the trouble begins. MS-DOS 6.22 was never officially released on a bootable CD. Microsoft expected you to boot from Floppy Disk #1. Therefore, any "MS-DOS 6.22 bootable ISO" you find today is a community-created hack. bundled them onto a CD-ROM image
Someone, somewhere, took the three floppy images, used a tool like mkisofs or UltraISO, bundled them onto a CD-ROM image, and injected a boot sector that emulates a floppy drive (a technique called "floppy emulation" or "no-emulation boot"). These ISOs are not "official." They are acts of digital archaeology.
These emulate specific motherboards (486, Pentium). Load the ISO as a CD-ROM. Much better for benchmarking old games.