EMS Status/errorcodes

        Status  Reason
        --------------------------------------------------------------
         00h    Function successful
         80h    Internal error
         81h    Hardware malfunction
         83h    Invalid handle
         84h    Undefined function requested
         85h    No more handles available
         86h    Error in save or restore of mapping context
         87h    More pages requested than physically exist
         88h    More pages requested than currently available
         89h    Zero pages requested
         8Ah    Invalid logical page number
         8Bh    Illegal physical-page number
         8Ch    Page-mapping hardware state save area is full
         8Dh    Save of mapping context failed
         8Eh    Restore of mapping context failed
         8Fh    Undefined subfunction parameter
         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 DMA register set not supported
         9Bh    All DMA register sets currently allocated
         9Ch    Alternate DMA sets not supported
         9Dh    Undefined or unallocated DMA register set
         9Eh    Dedicated DMA channels not supported
         9Fh    Specified dedicated DMA channel not supported
         A0h    No such handle name
         A1h    Duplicate handle name
         A2h    Attempted to wrap around 1M conventional address space
         A3h    Contents of partial page map corrupted or count of
                mappable segments exceeds total number of mappable
                segments in system
         A4h    Access denied by operating system