INT 7A U - Novell NetWare - IPX Driver - internal - ADD DIAGNOSTIC ELEMENT
        BX = 0018h
        ES:SI -> diagnostic element (see below) to be added to Diagnostic Queue
Note:   this function is supported on file servers only under v2.15; v3.02 also
          supports it on workstations
SeeAlso: BX=0019h

Format of diagnostic element:
Offset  Size    Description
 00h    DWORD   pointer to next diagnostic element
 04h    DWORD   pointer to function for ???
 08h    DWORD   pointer to function for ???

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