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  Interrupt:   21h     Function:   59h
 
  Title:       Get Extended Error Information [Version 3.0+]
 
  See also:    Set Extended Error Information
 
  Description:
 
     Obtains detailed error information after a previous unsuccessful
     Int 21h function call, including the recommended remedial action.
 
     Input        Output
 
     AH = 59h     AX = Extended error code
     BX = 00h     See: ◄Error codes►
                  BH = Error class
                       01h (if out of resource (such as storage
                            or handles))
                       02h (if not error, but temporary situation
                            (such as locked region in file) that
                            can be expected to end)
                       03h (if authorization problem)
                       04h (if internal error in system software)
                       05h (if hardware failure)
                       06h (if system software failure not the
                            fault of the active process (such
                            as missing configuration files)
                       07h (if application program error)
                       08h (if file or item not found)
                       09h (if file or item of invalid type or
                            format)
                       0Ah (10) (if file or item interlocked)
                       0Bh (11) (if wrong disk in drive, bad spot on
                                 disk, or storage medium problem)
                       0Ch (12) (if other error)
                  BL = Recommended action
                       01h Retry reasonable number of times,
                           then prompt user to select abort or
                           ignore
                       02h Retry reasonable number of times
                           with delay between retries, then
                           prompt user to select abort or
                           ignore
                       03h Get corrected information from user
                           (typically caused by incorrect
                            filename or drive specification)
                       04h Abort application with cleanup
                           (terminate the program in as
                            orderly a manner as possible,
                            releasing locks, closing files,
                            ...)
                       05h Perform immediate exit without
                           cleanup
                       06h Ignore error
                       07h Retry after user intervention to
                           remove cause of error
                  CH = Error locus
                       01h Unknown
                       02h Block device (disk or disk
                           emulator)
                       03h Network
                       04h Serial device
                       05h Memory
                  And for MS-DOS versions 3.0+
               ES:DI = ASCIIZ volume label of disk to insert, if
                       AX = 0022h (invalid disk change)
                                    -♦-