diff --git a/cprop.cc b/cprop.cc
index 49939a1f1..41995da46 100644
--- a/cprop.cc
+++ b/cprop.cc
@@ -17,7 +17,7 @@
  *    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
  */
 #if !defined(WINNT) && !defined(macintosh)
-#ident "$Id: cprop.cc,v 1.36 2002/06/24 01:49:38 steve Exp $"
+#ident "$Id: cprop.cc,v 1.37 2002/06/25 01:33:22 steve Exp $"
 #endif
 
 # include "config.h"
@@ -65,7 +65,7 @@ void cprop_functor::lpm_add_sub(Design*des, NetAddSub*obj)
 	// adder. These will be eliminated later.
       while ((obj->width() > 1)
 	     && obj->pin_DataA(0).nexus()->drivers_constant()
-	     && (driven_value(obj->pin_DataA(0)) == verinum::V0)) {
+	     && (obj->pin_DataA(0).nexus()->driven_value() == verinum::V0)) {
 
 	    NetAddSub*tmp = 0;
 	    tmp = new NetAddSub(obj->scope(), obj->name(), obj->width()-1);
@@ -90,7 +90,7 @@ void cprop_functor::lpm_add_sub(Design*des, NetAddSub*obj)
 	// Now do the same thing on the B side.
       while ((obj->width() > 1)
 	     && obj->pin_DataB(0).nexus()->drivers_constant()
-	     && (driven_value(obj->pin_DataB(0)) == verinum::V0)) {
+	     && (obj->pin_DataB(0).nexus()->driven_value() == verinum::V0)) {
 
 	    NetAddSub*tmp = 0;
 	    tmp = new NetAddSub(obj->scope(), obj->name(), obj->width()-1);
@@ -164,8 +164,8 @@ void cprop_functor::lpm_compare_eq_(Design*des, NetCompare*obj)
 		  continue;
 	    if (! obj->pin_DataB(idx).nexus()->drivers_constant())
 		  continue;
-	    if (driven_value(obj->pin_DataA(idx)) ==
-		driven_value(obj->pin_DataB(idx)))
+	    if (obj->pin_DataA(idx).nexus()->driven_value() ==
+		obj->pin_DataB(idx).nexus()->driven_value())
 		  continue;
 
 	    NetConst*zero = new NetConst(scope, obj->name(), verinum::V0);
@@ -315,7 +315,7 @@ void cprop_functor::lpm_logic(Design*des, NetLogic*obj)
 			    continue;
 		      }
 
-		      if (driven_value(obj->pin(idx)) == verinum::V1) {
+		      if (obj->pin(idx).nexus()->driven_value()==verinum::V1) {
 			    obj->pin(idx).unlink();
 			    top -= 1;
 			    if (idx < top) {
@@ -326,7 +326,7 @@ void cprop_functor::lpm_logic(Design*des, NetLogic*obj)
 			    continue;
 		      }
 
-		      if (driven_value(obj->pin(idx)) != verinum::V0) {
+		      if (obj->pin(idx).nexus()->driven_value() != verinum::V0) {
 			    idx += 1;
 			    xs += 1;
 			    continue;
@@ -462,7 +462,7 @@ void cprop_functor::lpm_logic(Design*des, NetLogic*obj)
 			    continue;
 		      }
 
-		      if (driven_value(obj->pin(idx)) == verinum::V0) {
+		      if (obj->pin(idx).nexus()->driven_value() == verinum::V0) {
 			    obj->pin(idx).unlink();
 			    top -= 1;
 			    if (idx < top) {
@@ -473,7 +473,7 @@ void cprop_functor::lpm_logic(Design*des, NetLogic*obj)
 			    continue;
 		      }
 
-		      if (driven_value(obj->pin(idx)) != verinum::V1) {
+		      if (obj->pin(idx).nexus()->driven_value() != verinum::V1) {
 			    idx += 1;
 			    continue;
 		      }
@@ -593,7 +593,7 @@ void cprop_functor::lpm_logic(Design*des, NetLogic*obj)
 			    continue;
 		      }
 
-		      if (driven_value(obj->pin(idx)) == verinum::V0) {
+		      if (obj->pin(idx).nexus()->driven_value() == verinum::V0) {
 			    obj->pin(idx).unlink();
 			    top -= 1;
 			    if (idx < top) {
@@ -623,7 +623,7 @@ void cprop_functor::lpm_logic(Design*des, NetLogic*obj)
 			    continue;
 		      }
 
-		      if (driven_value(obj->pin(idx)) == verinum::V1) {
+		      if (obj->pin(idx).nexus()->driven_value() == verinum::V1) {
 			    if (one == 0) {
 				  one = idx;
 				  ones += 1;
@@ -684,7 +684,7 @@ void cprop_functor::lpm_logic(Design*des, NetLogic*obj)
 		      unsigned save;
 		      if (! obj->pin(1).nexus()->drivers_constant())
 			    save = 1;
-		      else if (driven_value(obj->pin(1)) != verinum::V1)
+		      else if (obj->pin(1).nexus()->driven_value() != verinum::V1)
 			    save = 1;
 		      else
 			    save = 2;
@@ -782,7 +782,7 @@ void cprop_functor::lpm_mux(Design*des, NetMux*obj)
 		  break;
 	    }
 
-	    if (driven_value(obj->pin_Data(idx, 0)) != verinum::Vz) {
+	    if (obj->pin_Data(idx, 0).nexus()->driven_value() != verinum::Vz) {
 		  flag = false;
 		  break;
 	    }
@@ -814,7 +814,7 @@ void cprop_functor::lpm_mux(Design*des, NetMux*obj)
 		  break;
 	    }
 
-	    if (driven_value(obj->pin_Data(idx, 1)) != verinum::Vz) {
+	    if (obj->pin_Data(idx, 1).nexus()->driven_value() != verinum::Vz) {
 		  flag = false;
 		  break;
 	    }
@@ -949,6 +949,9 @@ void cprop(Design*des)
 
 /*
  * $Log: cprop.cc,v $
+ * Revision 1.37  2002/06/25 01:33:22  steve
+ *  Cache calculated driven value.
+ *
  * Revision 1.36  2002/06/24 01:49:38  steve
  *  Make link_drive_constant cache its results in
  *  the Nexus, to improve cprop performance.
diff --git a/link_const.cc b/link_const.cc
index bd3df0de3..f36ada7a8 100644
--- a/link_const.cc
+++ b/link_const.cc
@@ -17,7 +17,7 @@
  *    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
  */
 #if !defined(WINNT) && !defined(macintosh)
-#ident "$Id: link_const.cc,v 1.13 2002/06/24 01:49:39 steve Exp $"
+#ident "$Id: link_const.cc,v 1.14 2002/06/25 01:33:22 steve Exp $"
 #endif
 
 # include "config.h"
@@ -101,13 +101,29 @@ bool Nexus::drivers_constant() const
       return true;
 }
 
-verinum::V driven_value(const Link&lnk)
+verinum::V Nexus::driven_value() const
 {
-      verinum::V val = lnk.get_init();
+      switch (driven_) {
+	  case V0:
+	    return verinum::V0;
+	  case V1:
+	    return verinum::V1;
+	  case Vx:
+	    return verinum::Vx;
+	  case Vz:
+	    return verinum::Vz;
+	  case VAR:
+	    assert(0);
+	    break;
+	  case NO_GUESS:
+	    break;
+      }
 
-      const Nexus*nex = lnk.nexus();
-      for (const Link*cur = nex->first_nlink()
-		 ; cur  ;  cur = cur->next_nlink()) {
+      const Link*cur = list_;
+
+      verinum::V val = verinum::Vz;
+
+      for (cur = list_ ; cur  ;  cur = cur->next_) {
 
 	    const NetConst*obj;
 	    const NetNet*sig;
@@ -116,19 +132,41 @@ verinum::V driven_value(const Link&lnk)
 
 	    } else if (sig = dynamic_cast<const NetNet*>(cur->get_obj())) {
 
-		  if (sig->type() == NetNet::SUPPLY0)
+		  if (sig->type() == NetNet::SUPPLY0) {
+			driven_ = V0;
 			return verinum::V0;
-
-		  if (sig->type() == NetNet::SUPPLY1)
+		  }
+		  if (sig->type() == NetNet::SUPPLY1) {
+			driven_ = V1;
 			return verinum::V1;
+		  }
 	    }
       }
 
+	/* Cache the result. */
+      switch (val) {
+	  case verinum::V0:
+	    driven_ = V0;
+	    break;
+	  case verinum::V1:
+	    driven_ = V1;
+	    break;
+	  case verinum::Vx:
+	    driven_ = Vx;
+	    break;
+	  case verinum::Vz:
+	    driven_ = Vz;
+	    break;
+      }
+
       return val;
 }
 
 /*
  * $Log: link_const.cc,v $
+ * Revision 1.14  2002/06/25 01:33:22  steve
+ *  Cache calculated driven value.
+ *
  * Revision 1.13  2002/06/24 01:49:39  steve
  *  Make link_drive_constant cache its results in
  *  the Nexus, to improve cprop performance.
diff --git a/mingw.txt b/mingw.txt
index a2b49c175..659f5ace2 100644
--- a/mingw.txt
+++ b/mingw.txt
@@ -88,10 +88,12 @@ to build properly.
 
 This, believe it or not, should be the easy part:
 
-	$ make
+	$ /usr/bin/make
 
 It could take a while. Now is a good time to go get some coffee or
-take a tea break.
+take a tea break. I suggest using the complete path to make, because
+the mingw version will not know how to execute the /usr/bin/install
+program.
 
 
 * Install Icarus Verilog
@@ -106,7 +108,7 @@ window.
 
 When you are ready, install like this:
 
-	$ make install
+	$ /usr/bin/make STRIP=/usr/bin/strip.exe install
 
 This is part of what the configure program did for you. The Makefiles
 now know to put the files under the D:\iverilog (or whatever directory
diff --git a/netlist.h b/netlist.h
index eb7a5179b..34042805f 100644
--- a/netlist.h
+++ b/netlist.h
@@ -19,7 +19,7 @@
  *    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
  */
 #if !defined(WINNT) && !defined(macintosh)
-#ident "$Id: netlist.h,v 1.246 2002/06/24 01:49:39 steve Exp $"
+#ident "$Id: netlist.h,v 1.247 2002/06/25 01:33:22 steve Exp $"
 #endif
 
 /*
@@ -251,6 +251,10 @@ class Nexus {
 	   are no drivers at all. */
       bool drivers_constant() const;
 
+	/* Given the nexus has constant drivers, this method returns
+	   the value that has been driven. */
+      verinum::V driven_value() const;
+
       void* t_cookie() const;
       void* t_cookie(void*) const;
 
@@ -2937,6 +2941,9 @@ extern ostream& operator << (ostream&, NetNet::Type);
 
 /*
  * $Log: netlist.h,v $
+ * Revision 1.247  2002/06/25 01:33:22  steve
+ *  Cache calculated driven value.
+ *
  * Revision 1.246  2002/06/24 01:49:39  steve
  *  Make link_drive_constant cache its results in
  *  the Nexus, to improve cprop performance.
diff --git a/netmisc.h b/netmisc.h
index fa1dd80e4..af5ff8d45 100644
--- a/netmisc.h
+++ b/netmisc.h
@@ -19,7 +19,7 @@
  *    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
  */
 #if !defined(WINNT) && !defined(macintosh)
-#ident "$Id: netmisc.h,v 1.13 2002/06/24 01:49:39 steve Exp $"
+#ident "$Id: netmisc.h,v 1.14 2002/06/25 01:33:22 steve Exp $"
 #endif
 
 # include  "netlist.h"
@@ -33,13 +33,6 @@
 extern NetExpr*pad_to_width(NetExpr*expr, unsigned wid);
 extern NetNet*pad_to_width(Design*des, NetNet*n, unsigned w);
 
-/*
- * This function returns the value of the constant driving this link,
- * or Vz if there is no constant. The results of this function are
- * only meaningful if link_drivers_constant(lnk) == true.
- */
-extern verinum::V driven_value(const Link&lnk);
-
 /*
  * In some cases the lval is accessible as a pointer to the head of
  * a list of NetAssign_ objects. This function returns the width of
@@ -57,6 +50,9 @@ extern NetExpr* elab_and_eval(Design*des, NetScope*scope, const PExpr*pe);
 
 /*
  * $Log: netmisc.h,v $
+ * Revision 1.14  2002/06/25 01:33:22  steve
+ *  Cache calculated driven value.
+ *
  * Revision 1.13  2002/06/24 01:49:39  steve
  *  Make link_drive_constant cache its results in
  *  the Nexus, to improve cprop performance.
diff --git a/syn-rules.y b/syn-rules.y
index ecbe7eb71..43ef430e2 100644
--- a/syn-rules.y
+++ b/syn-rules.y
@@ -19,7 +19,7 @@
  *    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
  */
 #if !defined(WINNT) && !defined(macintosh)
-#ident "$Id: syn-rules.y,v 1.21 2002/06/08 23:42:46 steve Exp $"
+#ident "$Id: syn-rules.y,v 1.22 2002/06/25 01:33:22 steve Exp $"
 #endif
 
 # include "config.h"
@@ -226,7 +226,7 @@ static void make_initializer(Design*des, NetProcTop*top, NetAssignBase*asn)
 
       for (unsigned idx = 0 ;  idx < asn->l_val(0)->lwidth() ;  idx += 1) {
 
-	    verinum::V bit = driven_value(rsig->bit(idx));
+	    verinum::V bit = rsig->bit(idx).nexus()->driven_value();
 
 	    Nexus*nex = asn->l_val(0)->sig()->pin(idx).nexus();
 	    for (Link*cur = nex->first_nlink()
diff --git a/t-dll.cc b/t-dll.cc
index 812e3f902..ff2505d74 100644
--- a/t-dll.cc
+++ b/t-dll.cc
@@ -17,7 +17,7 @@
  *    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
  */
 #if !defined(WINNT) && !defined(macintosh)
-#ident "$Id: t-dll.cc,v 1.87 2002/06/24 01:49:39 steve Exp $"
+#ident "$Id: t-dll.cc,v 1.88 2002/06/25 01:33:22 steve Exp $"
 #endif
 
 # include "config.h"
@@ -1030,7 +1030,7 @@ void dll_target::lpm_clshift(const NetCLShift*net)
       if (net->pin_Direction().is_linked()) {
 	    assert( net->pin_Direction().nexus()->drivers_constant() );
 
-	    verinum::V dir = driven_value(net->pin_Direction());
+	    verinum::V dir = net->pin_Direction().nexus()->driven_value();
 	    switch (dir) {
 		case verinum::V0:
 		  break;
@@ -1950,6 +1950,9 @@ extern const struct target tgt_dll = { "dll", &dll_target_obj };
 
 /*
  * $Log: t-dll.cc,v $
+ * Revision 1.88  2002/06/25 01:33:22  steve
+ *  Cache calculated driven value.
+ *
  * Revision 1.87  2002/06/24 01:49:39  steve
  *  Make link_drive_constant cache its results in
  *  the Nexus, to improve cprop performance.
diff --git a/xnfio.cc b/xnfio.cc
index d04b95093..5ead89b5e 100644
--- a/xnfio.cc
+++ b/xnfio.cc
@@ -17,7 +17,7 @@
  *    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
  */
 #if !defined(WINNT) && !defined(macintosh)
-#ident "$Id: xnfio.cc,v 1.21 2002/06/24 01:49:39 steve Exp $"
+#ident "$Id: xnfio.cc,v 1.22 2002/06/25 01:33:22 steve Exp $"
 #endif
 
 # include "config.h"
@@ -323,7 +323,7 @@ bool xnfio_f::compare_sideb_const(Design*des, NetCompare*dev)
 	    if (! dev->pin_DataB(idx).nexus()->drivers_constant())
 		  return false;
 
-	    side.set(idx, driven_value(dev->pin_DataB(idx)));
+	    side.set(idx, dev->pin_DataB(idx).nexus()->driven_value());
       }
 
 	/* Handle the special case of comparing A to 0. Use an N-input
@@ -363,6 +363,9 @@ void xnfio(Design*des)
 
 /*
  * $Log: xnfio.cc,v $
+ * Revision 1.22  2002/06/25 01:33:22  steve
+ *  Cache calculated driven value.
+ *
  * Revision 1.21  2002/06/24 01:49:39  steve
  *  Make link_drive_constant cache its results in
  *  the Nexus, to improve cprop performance.