Get Memory Information

Returns information about available physical and virtual
memory.  Since DPMI clients will often run in multitasking
environments, some of information related to shared
resources returned by this function should only be
considered as advisory.

Call With:

   AX     = 050BH
   ES:(E)DI= selector:offset of 128-byte buffer

Returns:

   if function successful
   Carry flag= clear (this function always succeeds in DPMI
           1.0)

   and the buffer pointed to by ES:(E)DI is filled in with
           the following information:

   Offset Length  Contents
   00H    4       Total allocated bytes of physical memory
   controlled by DPMI host
   04H    4       Total allocated bytes of virtual memory
   controlled by DPMI host
   08H    4       Total available bytes of virtual memory
   controlled by DPMI host
   0CH    4       Total allocated bytes of virtual memory
   for this virtual machine
   10H    4       Total available bytes of virtual memory
   for this virtual machine
   14H    4       Total allocated bytes of virtual memory
   for this client
   18H    4       Total available bytes of virtual memory
   for this client
   1CH    4       Total locked bytes of memory for this
   client
   20H    4       Maximum locked bytes of memory for this
   client
   24H    4       Highest linear address available to this
   client
   28H    4       Size in bytes of largest available free
   memory block
   2CH    4       Size of minimum allocation unit in bytes
   30H    4       Size of the allocation alignment unit in
   bytes
   34H    4CH     Reserved, currently zero

   if function unsuccessful
   Carry flag= set (this function always fails in DPMI 0.9)

Notes:

o  DPMI 1.0 clients should use this function in preference
   to Int 31H Fn 0500H.
o  The "total available bytes" field of the data structure
   pointed by ES:(E)DI means the total bytes minus all of
   the allocated bytes.