INT 2fH ad80H: Is KEYB.COM Installed? / Get Version

                                                         Compatibility: 5.0+ 
 Expects: AX    ad80H
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 Returns: BX    0000H is KEYB.COM is not loaded
                version:  BH is major version number (e.g 03H for 3.10)
                          BL is minor version number (e.g 0aH for 3.10)
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    Info: Determines whether KEYB.COM has been executed and is resident in
          memory and returns the version number.

See Also: INT 2fH adxxH: KEYB.COM Functions
          INT 2fH: Multiplex Interrupt
          DOS Functions
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