VER (Version) COMMAND

Purpose:  Displays the operating system version number or modifies it.

Syntax:   VER [version|/R]

Type:     Internal command

Description:
     The version number consists of a digit defining the main version
number, a dot, and a two digits defining the revision number.

Parameters:

version - the version number you want to set,
/R      - sets the actual DOS version number.

Examples:
1.    A>ver

This commAND displays the data:

      DOS version 5.00

2. Setting another DOS version may be achieved by typing:

      A:\>VER 4.10

The change will immediately appear on the screen:

      DOS Version 4.10

3. To restore the original DOS version, type

      A:\>VER /R

Modifying the DOS version number is necessary for running certain programs
that were originally tied to a particular version of DOS, but still can
operate under later versions as well. The GetDosVersion DOS function (int
21h/AH=30h) returns the value set by the inerpreter, while the
GetTrueDosVersion (int 21h/AX=3306h) returns the correct value.