INT 2F - Novell NetWare - SHELL 3.01d BROADCAST - ABNORMAL EXIT
        AX = 7A80h
Return: nothing
Notes:  called on abnormal exit of the NetWare shell to notify other Novell
          TSRs that it is unsafe to call the shell in the future.
        must be passed through so that all interested programs see the exit
        on receiving this call, IPXODI clears an internal pointer to a
          default value; Novell's NETBIOS.EXE clears its INT 21h pointer to
          0000h:0000h and stops calling it