INT 21 - Novell NetWare - FILE SERVICES - FILE SERVER FILE COPY
        AH = F3h
        ES:DI -> request buffer (see below)
Return: AL = status/error code
        CX:DX = number of bytes copied
Notes:  this function is supported by Advanced NetWare 2.0+
        both source and destination must be on the same file server
SeeAlso: AH=3Ch,AH=3Fh

Format of request buffer:
Offset  Size    Description
 00h    WORD    source file handle (as returned by AH=3Ch or AH=3Dh)
 02h    WORD    destination file handle
 04h    DWORD   starting offset in source
 08h    DWORD   starting offset in destination
 0Ch    DWORD   number of bytes to copy

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