Int 2F Fn E44F  - Ndos V4.0+ - Kstack.com - Installation Check             [K]

   AX = E44Fh
   BX = 0000h

Return: AX = 44EEh if installed
Program: NDOS is a version of 4DOS licensed to Symantec for inclusion in the
     Norton Utilities

Note:  this function is also supported by ANSIPLUS v3.01+ and K3PLUS v6.20+,
     which emulate the 4DOS and NDOS keystack

See Also: AX=D44Fh/BX=0000h,AX=E44Fh/BX=0001h