old-www/HOWTO/Visual-Bell-6.html

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<H2><A NAME="s6">6. Defining a Visible Bell</A></H2>
<P>You can add the entry for the <CODE>vb</CODE> capability in your own termcap
file, if it doesn't already define one. Dennis Henriksen
(duke@diku.dk) suggested to insert the following line in the
<CODE>termcap</CODE> entry for <CODE>linux</CODE> (note that the entry is called
<CODE>console</CODE> in old distributions):
<BLOCKQUOTE><CODE>
<PRE>
:vb=\E7\E[?5h\E[?5l\E[?5h\E[?5l\E[?5h\E[?5l\E[?5h\E[?5l\E8:\
</PRE>
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The trailing backslash is used to escape the newline in the database.
Dennis' code does the following (his own words):
<UL>
<LI>Save the cursor position (uust a safety precaution).</LI>
<LI>Change the background color several times between normal and reverse.</LI>
<LI>Restore the cursor position.</LI>
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