Syntax: /M[AP][:full]
This option lists in the map file all public (global) symbols defined in the object files. With this option, the map file contains a list of all the symbols sorted by name, and a list of all the symbols sorted by address. If you don't use this option, the map file contains only a list of segments.
With this option, LINK386 creates a map file by default. If you explicitly enter a map file name of NUL, then no map file is created, and this option has no effect.
The Map option can be specified as /M:full to produce a comprehensive map showing the composition of each segment.