+T_MEMMAP [0 to 255] [string]
+Set part of selected thing's memory of the game map to string argument: the line
+of the argument's number.
+
+T_MEMTHING [0 to 255] [0 to 255] [0 to 255]
+Add to selected thing's memory of things on map thing of ID of first argument,
+y position of second argument and x position of third argument.
+