INT 2F - DR-DOS 6.0 TaskMAX - GET STATUS
        AX = 2701h
Return: AX = maximum simultaneous tasks
        BX = index into TASK_IDS of current foreground task
        CX = currently-active tasks
        DX = version number (DR-DOS 6.0 = 0001h)
        ES:SI -> TASK_IDS
        ES:DI -> name table (array of 8-byte names, NUL-terminated if <8 chars)
Notes:  do not attempt to create a new task if CX == AX
        the task's index is its position on the task menu, while its ID is the
          position within the internal task name table
SeeAlso: AX=2716h