Int 2F Fn 2706  - Dr Dos 6.0 Taskmax - Switch To Specified Task            [T]

   AX = 2706h
   DX = task index (see AX=2701h) of task to be activated

Return: DX = task index of previously-active task

Note:  the TaskMAX API is also supported by Novell DOS 7 TASKMGR in
     both taskswitching and multitasking modes

See Also: AX=2705h,AX=2707h,AX=2715h