Int 15 Fn C7  - System - Later Ps/2s - Return Memory-map Information       [B]

   AH = C7h
   DS:SI -> user supplied memory map table (see #0450)

Notes: call AH=C0h and examine bit 4 of feature byte 2 to check if this
     function is supported
   IBM classifies this function as optional

Return: CF set on error, clear if successful

See Also: AH=C0h,AH=C9h,AH=D1h,AX=E820h

Format of memory-map table structure:
Offset Size    Description (Table 0450)
 00h   WORD    length of table (excluding this word)
 02h   DWORD   local memory between 1M and 16M, in 1K blocks
 06h   DWORD   local memory between 16M and 4G, in 1K blocks
 0Ah   DWORD   system memory between 1M and 16M, in 1K blocks
 0Eh   DWORD   system memory between 16M and 4G, in 1K blocks
 12h   DWORD   cacheable memory between 1M and 16M, in 1K blocks
 16h   DWORD   cacheable memory between 16M and 4G, in 1K blocks
 1Ah   DWORD   1K blocks before start of non-system memory between 1M and 16M
 1Eh   DWORD   1K blocks before start of non-system memory between 16M and 4G
 22h   WORD    start segment of largest free block from C0000h-DFFFFh
 24h   WORD    size of largest free block
 26h   DWORD   reserved