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This is a utility to start a program at a defined priority. It is also able to start a VDM (DOS-session) at a defined priority.

What's new

  • There was a bug in the VDD "VDOSPRIO.SYS" (Version 1.0). It has been rewritten completely.
  • A bug fix for the IdleCall (AX=1680h, Int 2F) in OS/2 version 2.1 has been added (Version 2.0 of VDOSPRIO.SYS)
  • An interface to query the actual priority of a DOS-Session has been added (Version 2.2 of VDOSPRIO.SYS).
  • Some error messages have been added to spdos.exe.




  • Open Source software under the GNU GPL V3 license.