Option @option{-virtioconsole} has been replaced by
@option{-device virtconsole}.
+@subsection -clock (since 3.0.0)
+
+The @code{-clock} option is ignored since QEMU version 1.7.0. There is no
+replacement since it is not needed anymore.
+
@section qemu-img command line arguments
@subsection convert -s (since 2.0.0)