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diff --git a/testsuite/vests/vhdl-ams/ashenden/compliant/analog-modeling/ball_wa.vhd b/testsuite/vests/vhdl-ams/ashenden/compliant/analog-modeling/ball_wa.vhd
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+
+-- Copyright (C) 2002 Morgan Kaufmann Publishers, Inc
+
+-- This file is part of VESTs (Vhdl tESTs).
+
+-- VESTs is free software; you can redistribute it and/or modify it
+-- under the terms of the GNU General Public License as published by the
+-- Free Software Foundation; either version 2 of the License, or (at
+-- your option) any later version. 
+
+-- VESTs is distributed in the hope that it will be useful, but WITHOUT
+-- ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+-- FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+-- for more details. 
+
+-- You should have received a copy of the GNU General Public License
+-- along with VESTs; if not, write to the Free Software Foundation,
+-- Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA 
+
+ENTITY ball_wa IS 
+END ENTITY ball_wa; 
+
+ARCHITECTURE simple OF ball_wa IS 
+	QUANTITY v: real; 
+	QUANTITY s: real; 
+	CONSTANT G: real := 9.81; 
+	CONSTANT Air_Res: real := 0.1; 
+	SIGNAL damping: real := -0.7; 
+	signal v_at_impact : real:= 0.0; 
+	signal impact: boolean; 
+BEGIN 
+	if domain = quiescent_domain use 
+		v == 0.0; 
+		s == 30.0; 
+	elsif impact use 
+		v == damping*v_at_impact; 
+		s == 0.0; 
+	else 
+		s'dot == v; 
+		v'dot == -G; 
+	end use; 
+	process begin 
+		wait until not s'above(0.0); 
+		if v < -1.0e-9 then 
+			v_at_impact <= v; 
+			impact <= true, false after 1 us; 
+		else 
+			damping <= 0.0; 
+			impact <= true; 
+		end if; 
+	end process; 
+	break on impact; 
+END architecture simple; 
+
+
+