Int 2F Fn 270D  - Dr-dos 6.0 Taskmax - Check If Task Running Primary Comm  [T]

   AX = 270Dh
   DX = task index

Return: DX = status
       0000h if primary command interpreter (COMMAND.COM, etc.) running
       0001h if not in root shell for task

Note:  TaskMAX will return 0001h if the specified task has spawned another
     command interpreter with AX=2707h

See Also: AX=2707h,AX=270Ch