Bootable floppy disks ("boot floppies") for PCs usually contain DOS or miniature versions of Linux. Note that almost no other USB floppy drives supported Mac GCR floppies. He wrote a cassette-based operating system before floppies and hard disks were common. TOS upgrades, switched to formatting MSDOS compatible floppies. The DEC Rainbow 100 MS-DOS did support FAT formatted floppies. The Atari ST uses that info, so it can operate with floppies formatted either way. It supported high Density floppies and CD-ROM if the Amiga hardware had mounted those devices. MB EHD floppies are corrupted by the virus. Featuring three floppies, the game ran on all Amiga computers. It was also possible to use cassette tape floppies. Compared to the floppies, the CD-ROM contained additional drivers and applications. A similar technique was also used by Vincent Joguin's Disk2FDI for Amiga floppies. Compatible with DOS 2.0 - Allowed the use of Double Density floppies. Versions of the installer in floppies were also available for sale. It was able to read erroneous floppies.