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A MS-DOS Simulator for the C64.

A Disk Operating System (short: DOS) provides a software interface to magnetic disk-based storage. Commodore's Disk Operating System is built into the intelligent peripheral disk drive itself as firmware in ROM chips onboard.

Commodore DOS conforms to a standardized text command interface between the host computer and the intelligent peripheral.

The commands and feature set supported by the DOS is dependent upon the model of disk drive attached to the host computer.

DOS general[edit | edit source]

Overview of a few DOS systems of different old home computer systems:

  • CP/M (since 1975)
  • TRS-DOS (1978)
  • Commodore DOS/CBM-DOS (since 1979)
  • Apple DOS (July 1978)
  • Atari DOS (1979)
  • AmigaDOS (1985)
  • IBM-PC compatible DOS (since ca. 1980)

These DOS version and systems aren't compatible together!

Commodore DOS[edit | edit source]

CBM-DOS Versions

Notice: Later models of the same disk drive type can have higher CBM-DOS versions!

PC compatibles DOS[edit | edit source]

Overview of differents DOS for the PC from different software producers:

  • MS-DOS from Microsoft
  • PC-DOS from IBM (temporary developed by Microsoft)
  • DR-DOS from Digital Research (to buy out by Novell)
  • Novell DOS from Novell (a further development of DR-DOS)
  • Caldera Open DOS (earlier: Novell DOS)
  • FreeDOS (a open-free DOS clone)

In the years 1986 until 1988 a Italian programming team developed a MS-DOS Simulator, which are simulated important commands of the COMMAND.COM.

Links[edit | edit source]

WP-W11.png Wikipedia: Disk_Operating_System
WP-W11.png Wikipedia: Commodore_DOS
WP-W11.png Wikipedia: TRS-DOS
WP-W11.png Wikipedia: MFM