XXXXXXXXX is "STACKS", "MSG BUFS" or "FAST BUFS"

    Shows what information about tasks is currently shown in displays
    84 - 87.

    To select the type of information select this display via menu.
    Type is changed in order STACKS -> MSG BUFS  -> FAST BUFS -> STACKS.
    So, if STACKS is currently displayed and you want to see FAST BUFS,
    you have to select this display twice via menu.

    "STACKS"    shows free stack space in worst case.
    "MSG BUFS"  shows the peak number of pending messages.
    "FAST BUFS" shows the peak number of pending fast messages.