The disc operating system VDOS was developped by the german company Vortex.
It was provided for use with the Vortex Disc Drives from Vortex (F1-D, F1-S, F1-X, M1-D, M1-S or M1-X).
VDOS was supplied on an EPROM, and was released in 3 versions:
- VDOS 1.0
- VDOS 2.0
- VDOS 2.11
Further there were German and English versions of this ROMs.
The VDOS ROM also contained a machine language monitor.
VDOS supported as first DOS the Vortex format, which become a standard format later on.
Manual
- Vortex Vdos 2.0 Manual (pdf)
(also describes how to upgrade from VDOS 1.0 to 2.0)
Media
Boot-up VDOS message
VDOS external look
Internals photo
