The t command sets and removes the monitor trace. A minus sign displays, acknowledging the removal.
t{[mmonitor.address|fid.disp]{;window}}
This command can also set a trace on the specified area of memory starting at the monitor address or the area of memory associated to the FID displacement with a length equal to that window. If not specified, the default window or the size of the monitor element is used. The maximum window size on a monitor address is 32767. The maximum window on a virtual address is the frame size.
A plus sign displays acknowledging the setting. The memory is checked for any change at every virtual branch or call, and every frame fault. If the memory is changed, the monitor debugger is entered. When setting a trace on a virtual address, the frame is locked in memory. Removing the trace unlocks the frame if it was not locked when the trace was set.