When non-Autoconfig memory needs to be added to the system free pool, the
AddMemList() function can be used.  This function takes the size of the
memoryblock, its type, the priority for the memory list, the base address
and the name of the memory block.  A MemHeader structure will be placed at
the start of the memory block, the remainder of the memory block will be
made available for allocation. For example:

    AddMemList(0x200000, MEMF_FAST, 0, 0xF00000, "FZeroBoard");

will add a two megabyte memory block, starting at $F00000 to the system
free pool as Fast memory.  The memory list entry is identified with
"FZeroBoard".