diff --git a/Makefile.in b/Makefile.in
index 1ed8871de..44bfcbfcc 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -18,12 +18,12 @@
 #    59 Temple Place - Suite 330
 #    Boston, MA 02111-1307, USA
 #
-#ident "$Id: Makefile.in,v 1.62 2000/08/12 16:34:37 steve Exp $"
+#ident "$Id: Makefile.in,v 1.63 2000/08/20 04:13:56 steve Exp $"
 #
 #
 SHELL = /bin/sh
 
-VERSION = 0.3PRE
+VERSION = 0.3
 
 prefix = @prefix@
 exec_prefix = @exec_prefix@
@@ -135,7 +135,7 @@ lexor_keyword.cc: lexor_keyword.gperf
 	gperf -o -i 7 -C -k 1-3,$$ -L ANSI-C -H keyword_hash -N check_identifier -t lexor_keyword.gperf > lexor_keyword.cc || (rm -f lexor_keyword.cc ; false)
 
 
-install: all installdirs $(bindir)/iverilog $(libdir)/ivl/ivl $(mandir)/man1/iverilog.1
+install: all installdirs $(bindir)/iverilog $(libdir)/ivl/ivl $(includedir)/ivl_target.h $(mandir)/man1/iverilog.1
 	cd vpi ; $(MAKE) install
 	cd vvm ; $(MAKE) install
 	cd ivlpp ; $(MAKE) install
@@ -148,6 +148,9 @@ $(libdir)/ivl/ivl: ./ivl
 	$(INSTALL_PROGRAM) ./ivl $(libdir)/ivl/ivl
 	$(STRIP) $(libdir)/ivl/ivl
 
+$(includedir)/ivl_target.h: $(srcdir)/ivl_target.h
+	$(INSTALL_DATA) $(srcdir)/ivl_target.h $(includedir)/ivl_target.h
+
 $(mandir)/man1/iverilog.1: $(srcdir)/iverilog.man
 	$(INSTALL_DATA) $(srcdir)/iverilog.man $(mandir)/man1/iverilog.1
 
@@ -159,6 +162,7 @@ uninstall:
 	rm -f $(bindir)/verilog
 	rm -f $(bindir)/gverilog
 	rm -f $(bindir)/iverilog
+	rm -r $(includedir)/ivl_target.h
 	rm -f $(mandir)/man1/verilog.1
 	rm -f $(mandir)/man1/iverilog.1
 	cd vpi ; $(MAKE) uninstall
diff --git a/compiler.h b/compiler.h
index 781d14f5c..0f58e90e3 100644
--- a/compiler.h
+++ b/compiler.h
@@ -19,7 +19,7 @@
  *    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
  */
 #if !defined(WINNT) && !defined(macintosh)
-#ident "$Id: compiler.h,v 1.3 2000/03/17 21:50:25 steve Exp $"
+#ident "$Id: compiler.h,v 1.4 2000/08/20 04:13:56 steve Exp $"
 #endif
 
 /*
@@ -33,6 +33,25 @@
 # define INTEGER_WIDTH 32
 #endif
 
+/*
+ * When doing dynamic linking, we need a uniform way to identify the
+ * symbol. Some compilers put leading _, some trailing _. The
+ * configure script figures out which is the local convention and
+ * defines NEED_LU and NEED_TU as required.
+ */
+#ifdef NEED_LU
+#define LU "_"
+#else
+#define LU ""
+#endif
+
+#ifdef NEED_TU
+#define TU "_"
+#else
+#define TU ""
+#endif
+
+
 /*
  * These are flags to enable various sorts of warnings. By default all
  * the warnings are of, the -W<list> parameter arranges for each to be
@@ -44,6 +63,10 @@ extern bool warn_implicit;
 
 /*
  * $Log: compiler.h,v $
+ * Revision 1.4  2000/08/20 04:13:56  steve
+ *  Add ivl_target support for logic gates, and
+ *  make the interface more accessible.
+ *
  * Revision 1.3  2000/03/17 21:50:25  steve
  *  Switch to control warnings.
  *
diff --git a/ivl_target.h b/ivl_target.h
index 0720711f3..d47b0884e 100644
--- a/ivl_target.h
+++ b/ivl_target.h
@@ -19,7 +19,7 @@
  *    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
  */
 #if !defined(WINNT) && !defined(macintosh)
-#ident "$Id: ivl_target.h,v 1.3 2000/08/19 18:12:42 steve Exp $"
+#ident "$Id: ivl_target.h,v 1.4 2000/08/20 04:13:57 steve Exp $"
 #endif
 
 #ifdef __cplusplus
@@ -38,11 +38,25 @@ _BEGIN_DECL
  * module. The main program can load these modules and access the
  * functions within the loaded module to implement the backend
  * behavior.
+ *
+ * The interface is divided into two parts: the entry points within
+ * the core that are called by the module, and then entry points in
+ * the module that are called by the core. It is the latter that
+ * causes the module to be invoked in the first place, but most of the
+ * interesting information about the design is accessed through the
+ * various access functions that the modules calls into the core.
  */
 
 
-/* This is the opaque type of an entire design. This type is used when
-   requesting an operation that affects the entire netlist. */
+/* 
+ * In order to grab onto data in the design, the core passes cookies
+ * to the various functions of the module. These cookies can in turn
+ * be passed to access functions in the core to get more detailed
+ * information.
+ *
+ * The following typedefs list the various cookies that may be passed
+ * around.
+ */
 typedef struct ivl_design_s *ivl_design_t;
 
 typedef struct ivl_net_bufz_s *ivl_net_bufz_t;
@@ -67,7 +81,23 @@ typedef struct ivl_scope_s    *ivl_scope_t;
 extern const char* ivl_get_flag(ivl_design_t, const char*key);
 
 
-  /* TARGET MODULE ENTRY POINTS */
+/* Given an ivl_net_logic_t cookie, get the type of the gate. */
+typedef enum ivl_logic_e { IVL_AND, IVL_BUF, IVL_BUFIF0, IVL_BUFIF1,
+			   IVL_NAND, IVL_NOR, IVL_NOT, IVL_NOTIF0,
+			   IVL_NOTIF1, IVL_OR, IVL_XNOR, IVL_XOR } ivl_logic_t;
+
+extern ivl_logic_t ivl_get_logic_type(ivl_net_logic_t net);
+
+
+/* TARGET MODULE ENTRY POINTS
+ *
+ * The module entry points generally take a cookie and possibly a name
+ * as parameters. They use the cookie to get the required detailed
+ * information, and they do their job. The functions return an integer
+ * value which usually should be 0 for success, or less then 0 for any
+ * errors. How the error is interpreted depends on the function
+ * returning the error.
+ */
 
 /* target_start_design  (required)
 
@@ -150,6 +180,10 @@ _END_DECL
 
 /*
  * $Log: ivl_target.h,v $
+ * Revision 1.4  2000/08/20 04:13:57  steve
+ *  Add ivl_target support for logic gates, and
+ *  make the interface more accessible.
+ *
  * Revision 1.3  2000/08/19 18:12:42  steve
  *  Add target calls for scope, events and logic.
  *
diff --git a/t-dll.cc b/t-dll.cc
index 6c83f5c9d..9ca6b9d12 100644
--- a/t-dll.cc
+++ b/t-dll.cc
@@ -17,11 +17,12 @@
  *    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
  */
 #if !defined(WINNT) && !defined(macintosh)
-#ident "$Id: t-dll.cc,v 1.3 2000/08/19 18:12:42 steve Exp $"
+#ident "$Id: t-dll.cc,v 1.4 2000/08/20 04:13:57 steve Exp $"
 #endif
 
 # include  "target.h"
 # include  "ivl_target.h"
+# include  "compiler.h"
 # include  <dlfcn.h>
 
 struct ivl_design_s {
@@ -32,6 +33,10 @@ struct ivl_net_const_s {
       const NetConst*con_;
 };
 
+struct ivl_net_logic_s {
+      const NetLogic*dev_;
+};
+
 struct ivl_process_s {
       const NetProcTop*top_;
 };
@@ -95,13 +100,13 @@ bool dll_target::start_design(const Design*des)
       start_design_ = (start_design_f)dlsym(dll_, "target_start_design");
       end_design_   = (end_design_f)  dlsym(dll_, "target_end_design");
 
-      net_bufz_   = (net_bufz_f)  dlsym(dll_, "target_net_bufz");
-      net_const_  = (net_const_f) dlsym(dll_, "target_net_const");
-      net_event_  = (net_event_f) dlsym(dll_, "target_net_event");
-      net_logic_  = (net_logic_f) dlsym(dll_, "target_net_logic");
-      net_probe_  = (net_probe_f) dlsym(dll_, "target_net_probe");
-      process_    = (process_f)   dlsym(dll_, "target_process");
-      scope_      = (scope_f)     dlsym(dll_, "target_scope");
+      net_bufz_   = (net_bufz_f)  dlsym(dll_, LU "target_net_bufz" TU);
+      net_const_  = (net_const_f) dlsym(dll_, LU "target_net_const" TU);
+      net_event_  = (net_event_f) dlsym(dll_, LU "target_net_event" TU);
+      net_logic_  = (net_logic_f) dlsym(dll_, LU "target_net_logic" TU);
+      net_probe_  = (net_probe_f) dlsym(dll_, LU "target_net_probe" TU);
+      process_    = (process_f)   dlsym(dll_, LU "target_process" TU);
+      scope_      = (scope_f)     dlsym(dll_, LU "target_scope" TU);
 
       (start_design_)(&ivl_des);
       return true;
@@ -143,8 +148,11 @@ void dll_target::event(const NetEvent*net)
 
 void dll_target::logic(const NetLogic*net)
 {
+      struct ivl_net_logic_s obj;
+      obj.dev_ = net;
+
       if (net_logic_) {
-	    (net_logic_)(net->name().c_str(), 0);
+	    (net_logic_)(net->name().c_str(), &obj);
 
       } else {
 	    cerr << dll_path_ << ": internal error: target DLL lacks "
@@ -227,8 +235,24 @@ extern "C" const char*ivl_get_flag(ivl_design_t des, const char*key)
       return des->des_->get_flag(key).c_str();
 }
 
+extern "C" ivl_logic_t ivl_get_logic_type(ivl_net_logic_t net)
+{
+      switch (net->dev_->type()) {
+	  case NetLogic::AND:
+	    return IVL_AND;
+	  case NetLogic::OR:
+	    return IVL_OR;
+      }
+      assert(0);
+      return IVL_AND;
+}
+
 /*
  * $Log: t-dll.cc,v $
+ * Revision 1.4  2000/08/20 04:13:57  steve
+ *  Add ivl_target support for logic gates, and
+ *  make the interface more accessible.
+ *
  * Revision 1.3  2000/08/19 18:12:42  steve
  *  Add target calls for scope, events and logic.
  *
diff --git a/tgt-stub/Makefile.in b/tgt-stub/Makefile.in
index 274c9118b..8f31cc4f7 100644
--- a/tgt-stub/Makefile.in
+++ b/tgt-stub/Makefile.in
@@ -16,7 +16,7 @@
 #    59 Temple Place - Suite 330
 #    Boston, MA 02111-1307, USA
 #
-#ident "$Id: Makefile.in,v 1.1 2000/08/12 16:34:37 steve Exp $"
+#ident "$Id: Makefile.in,v 1.2 2000/08/20 04:13:57 steve Exp $"
 #
 #
 SHELL = /bin/sh
@@ -47,7 +47,7 @@ all: stub.tgt
 
 %.o dep/%.d: %.c
 	@[ -d dep ] || mkdir dep
-	$(CC) -Wall $(CPPFLAGS) -I$(srcdir) -MD -c $< -o $*.o
+	$(CC) -Wall $(CPPFLAGS) -I$(srcdir)/.. -MD -c $< -o $*.o
 	mv $*.d dep
 
 O = stub.o
diff --git a/tgt-stub/stub.c b/tgt-stub/stub.c
index bf0cc23d9..ef2c6f51e 100644
--- a/tgt-stub/stub.c
+++ b/tgt-stub/stub.c
@@ -17,9 +17,16 @@
  *    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
  */
 #if !defined(WINNT) && !defined(macintosh)
-#ident "$Id: stub.c,v 1.3 2000/08/19 18:12:42 steve Exp $"
+#ident "$Id: stub.c,v 1.4 2000/08/20 04:13:57 steve Exp $"
 #endif
 
+/*
+ * This is a sample target module. All this does is write to the
+ * output file some information about each object handle when each of
+ * the various object functions is called. This can be used to
+ * understand the behavior of the core as it uses a target module.
+ */
+
 # include  <ivl_target.h>
 # include  <stdio.h>
 
@@ -68,7 +75,18 @@ int target_net_event(const char*name, ivl_net_event_t net)
 
 int target_net_logic(const char*name, ivl_net_logic_t net)
 {
-      fprintf(out, "STUB: %s: logic gate\n", name);
+      switch (ivl_get_logic_type(net)) {
+	  case IVL_AND:
+	    fprintf(out, "STUB: %s: AND gate\n", name);
+	    break;
+	  case IVL_OR:
+	    fprintf(out, "STUB: %s: OR gate\n", name);
+	    break;
+	  default:
+	    fprintf(out, "STUB: %s: unsupported gate\n", name);
+	    return -1;
+      }
+
       return 0;
 }
 
@@ -85,6 +103,10 @@ int target_process(ivl_process_t net)
 
 /*
  * $Log: stub.c,v $
+ * Revision 1.4  2000/08/20 04:13:57  steve
+ *  Add ivl_target support for logic gates, and
+ *  make the interface more accessible.
+ *
  * Revision 1.3  2000/08/19 18:12:42  steve
  *  Add target calls for scope, events and logic.
  *
diff --git a/verilog.spec b/verilog.spec
index 04985961d..dab4d13cc 100644
--- a/verilog.spec
+++ b/verilog.spec
@@ -1,10 +1,10 @@
 Summary: Icarus Verilog
 Name: verilog
-Version: 0.3
-Release: 2
+Version: 0.4
+Release: x
 Copyright: GPL
 Group: Applications/Engineering
-Source: ftp://icarus.com/pub/eda/verilog/v0.3/verilog-0.3.tar.gz
+Source: ftp://icarus.com/pub/eda/verilog/v0.4/verilog-0.4.tar.gz
 URL: http://www.icarus.com/eda/verilog/index.html
 Packager: Stephen Williams <steve@icarus.com>
 
@@ -20,7 +20,7 @@ engineering formats, including a C++ simulation. It strives to be
 true to the IEEE-1364 standard.
 
 %prep
-%setup -n verilog-0.3
+%setup -n verilog-0.4
 
 %build
 ./configure --prefix=/usr
@@ -39,6 +39,7 @@ make prefix=$RPM_BUILD_ROOT/usr install
 %attr(-,root,root) /usr/lib/ivl/ivlpp
 %attr(-,root,root) /usr/lib/ivl/system.vpi
 %attr(-,root,root) /usr/lib/libvvm.a
+%attr(-,root,root) /usr/include/ivl_target.h
 %attr(-,root,root) /usr/include/vpi_priv.h
 %attr(-,root,root) /usr/include/vpi_user.h
 %attr(-,root,root) /usr/include/vvm.h