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        ; Extended-error codes (DOS 2.x: 00h-12h)
        00h   No error
        01h   Function number invalid
        02h   File not found
        03h   Path not found
        04h   Too many open files (no handles available)
        05h   Access denied
        06h   Invalid handle
        07h   Memory control block destroyed
        08h   Insufficient memory
        09h   Memory block address invalid
        0Ah   Environment invalid (usually >32K in length)
        0Bh   Format invalid
        0Ch   Access code invalid
        0Dh   Data invalid
        0Eh   Reserved
        0Fh   Invalid drive
        10h   Attempted to remove current directory
        11h   Not same device
        12h   No more files
        13h   Disk write-protected
        14h   Unknown unit
        15h   Drive not ready
        16h   Unknown command
        17h   Data error (CRC)
        18h   Bad request structure length
        19h   Seek error
        1Ah   Unknown media type (non-DOS disk)
        1Bh   Sector not found
        1Ch   Printer out of paper
        1Dh   Write fault
        1Eh   Read fault
        1Fh   General failure
        20h   Sharing violation
        21h   Lock violation
        22h   Disk change invalid (ES:DI -> MID structure)
        23h   FCB unavailable
        24h   Sharing buffer overflow
        25h   Code page mismatch                            (DOS 4+)
        26h   Cannot complete file operation (out of input) (DOS 4+)
        27h   Insufficient disk space                       (DOS 4+)
        28h-31h   Reserved
        32h   Network request not supported
        33h   Remote computer not listening
        34h   Duplicate name on network
        35h   Network name not found
        36h   Network busy
        37h   Network device no longer exists
        38h   Network BIOS command limit exceeded
        39h   Network adapter hardware error
        3Ah   Incorrect response from network
        3Bh   Unexpected network error
        3Ch   Incompatible remote adapter
        3Dh   Print queue full
        3Eh   Queue not full
        3Fh   Not enough space to print file
        40h   Network name was deleted
        41h   Network: Access denied
        42h   Network device type incorrect
        43h   Network name not found
        44h   Network name limit exceeded
        45h   Network BIOS session limit exceeded
        46h   Temporarily paused
        47h   Network request not accepted
        48h   Network print/disk redirection paused
        49h   Network software not installed
              Invalid network version                       (LANtastic)
        4Ah   Unexpected adapter close
              Account expired                               (LANtastic)
        4Bh   Password expired                              (LANtastic)
        4Ch   Login attempt invalid at this time            (LANtastic)
        4Dh   Disk limit exceeded on network node           (LANtastic)
        4Eh   Not logged in to network node                 (LANtastic)
        4Fh   Reserved
        50h   File exists
        51h   Reserved
        52h   Cannot make directory
        53h   Fail on INT 24h
        54h   Too many redirections                         (DOS 3.3+)
        55h   Duplicate redirection                         (DOS 3.3+)
        56h   Invalid password                              (DOS 3.3+)
        57h   Invalid parameter                             (DOS 3.3+)
        58h   Network write fault                           (DOS 3.3+)
        59h   Function not supported on network             (DOS 4+)
        5Ah   Required system component not installed       (DOS 4+)
        64h   Unknown error                                 (MSCDEX)
        65h   Not ready                                     (MSCDEX)
        66h   EMS memory no longer valid                    (MSCDEX)
        67h   Not High Sierra or ISO-9660 format            (MSCDEX)
        68h   Door open                                     (MSCDEX)