.df
The .df command displays a list of the free global memory objects in the global heap.
The list has the following form:
address: size owner [chain]
address
Specifies the selector of the memory in standard mode. In 386 enhanced mode, the address field specifies physical and heap addresses.
size
Specifies the size, in paragraphs (multiples of 16 bytes), of the object in standard mode. In 386 enhanced mode, the size field specifies the size of the object, in bytes.
owner
Always specifies that the module is free.
chain
Specifies the previous and next addresses in the list of least recently used (LRU) objects. 80386 Debugger displays the addresses only if the segment is movable and discardable.