Int 67 Fn 40  - LIM EMS - Get Manager Status                               [m]

   AH = 40h

Return: AH = status (00h,80h,81h,84h) (see below)

Note:  this call can be used only after establishing that the EMS driver is in
     fact present

See Also: AH=3Fh,AX=FFA5h

Values for EMS function status:
 00h   successful
 80h   internal error
 81h   hardware malfunction
 83h   invalid handle
 84h   undefined function requested by application
 85h   no more handles available
 86h   error in save or restore of mapping context
 87h   insufficient memory pages in system
 88h   insufficient memory pages available
 89h   zero pages requested
 8Ah   invalid logical page number encountered
 8Bh   invalid physical page number encountered
 8Ch   page-mapping hardware state save area is full
 8Dh   save of mapping context failed
 8Eh   restore of mapping context failed
 8Fh   undefined subfunction
 90h   undefined attribute type
 91h   feature not supported
 92h   successful, but a portion of the source region has been overwritten
 93h   length of source or destination region exceeds length of region
     allocated to either source or destination handle
 94h   conventional and expanded memory regions overlap
 95h   offset within logical page exceeds size of logical page
 96h   region length exceeds 1M
 97h   source and destination EMS regions have same handle and overlap
 98h   memory source or destination type undefined
 9Ah   specified alternate map register or DMA register set not supported
 9Bh   all alternate map register or DMA register sets currently allocated
 9Ch   alternate map register or DMA register sets not supported
 9Dh   undefined or unallocated alternate map register or DMA register set
 9Eh   dedicated DMA channels not supported
 9Fh   specified dedicated DMA channel not supported
 A0h   no such handle name
 A1h   a handle found had no name, or duplicate handle name
 A2h   attempted to wrap around 1M conventional address space
 A3h   source array corrupted
 A4h   operating system denied access