diff --git a/ivl_target.h b/ivl_target.h
index baa19c94b..0720711f3 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 1.2 2000/08/14 04:39:56 steve Exp $"
+#ident "$Id: ivl_target.h,v 1.3 2000/08/19 18:12:42 steve Exp $"
 #endif
 
 #ifdef __cplusplus
@@ -47,11 +47,23 @@ typedef struct ivl_design_s *ivl_design_t;
 
 typedef struct ivl_net_bufz_s *ivl_net_bufz_t;
 typedef struct ivl_net_const_s*ivl_net_const_t;
+typedef struct ivl_net_event_s*ivl_net_event_t;
+typedef struct ivl_net_logic_s*ivl_net_logic_t;
+typedef struct ivl_net_probe_s*ivl_net_probe_t;
 typedef struct ivl_process_s  *ivl_process_t;
+typedef struct ivl_scope_s    *ivl_scope_t;
+
 
 /* This function returns the string value of the named flag. The key
    is used to select the flag. If the key does not exist or the flag
-   does not have a value, this function returns 0. */
+   does not have a value, this function returns 0.
+
+   Flags come from the "-fkey=value" options to the iverilog command
+   line.
+
+   The key "-o" is special and is the argument to the -o flag of the
+   iverilog command. This is generally how the target learns the name
+   of the output file. */
 extern const char* ivl_get_flag(ivl_design_t, const char*key);
 
 
@@ -79,16 +91,40 @@ typedef void (*end_design_f)(ivl_design_t des);
    in the netlist. */
 typedef int (*net_bufz_f)(const char*name, ivl_net_bufz_t net);
 
+
 /* target_net_const
 
    The "target_net_const" function is called for structural constant
-   values that appear in the design. the DLL is expected to return 0
-   for success, or <0 for some sort of error. If this function is not
-   implemented by the DLL, ivl will generate an error when a constant
-   is detected in the design. */
+   values that appear in the design. */
 typedef int (*net_const_f)(const char*name, ivl_net_const_t net);
 
 
+/* target_net_event
+
+   Verilog code such as @event and @(posedge foo) create event
+   objects. These named objects can be triggered by structural probes
+   or behavioral triggers. The target_net_event function is called
+   once for each event in the netlist. The event function is
+   guaranteed to be called before probe or trigger functions. */
+typedef int (*net_event_f)(const char*name, ivl_net_event_t net);
+
+
+/* target_net_logic
+
+   This function is called for each logic gate in the design. The name
+   parameter is the name of the gate in the design. If the gate is
+   part of an array of gates, the name includes its index. */
+typedef int (*net_logic_f)(const char*name, ivl_net_logic_t net);
+
+
+/* target_net_probe
+
+   This is the probe, or structural trigger, of an event. The
+   net_event_f is guaranteed to be called for the associated event
+   before this probe is called. */
+typedef int (*net_probe_f)(const char*name, ivl_net_probe_t net);
+
+
 /* target_process
 
    The "target_process" function is called for each always and initial
@@ -99,10 +135,24 @@ typedef int (*net_const_f)(const char*name, ivl_net_const_t net);
    process statements, or if I will do that myself. Hmm... */
 typedef int (*process_f)(ivl_process_t net);
 
+
+/* target_scope (optional)
+
+   If the "target_scope" function is implemented in the module, it is
+   called to introduce a new scope in the design. If scopes are
+   nested, this method is always called for the containing scope
+   before the contained scope. Also, this is guaranteed to be called
+   before functions for any objects contained in this scope. */
+typedef void (*scope_f)(ivl_scope_t net);
+
+
 _END_DECL
 
 /*
  * $Log: ivl_target.h,v $
+ * Revision 1.3  2000/08/19 18:12:42  steve
+ *  Add target calls for scope, events and logic.
+ *
  * Revision 1.2  2000/08/14 04:39:56  steve
  *  add th t-dll functions for net_const, net_bufz and processes.
  *
diff --git a/t-dll.cc b/t-dll.cc
index 04ec3413a..6c83f5c9d 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 1.2 2000/08/14 04:39:57 steve Exp $"
+#ident "$Id: t-dll.cc,v 1.3 2000/08/19 18:12:42 steve Exp $"
 #endif
 
 # include  "target.h"
@@ -36,6 +36,10 @@ struct ivl_process_s {
       const NetProcTop*top_;
 };
 
+struct ivl_scope_s {
+      const NetScope*scope_;
+};
+
 /*
  * The DLL target type loads a named object file to handle the process
  * of scanning the netlist. When it is time to start the design, I
@@ -49,9 +53,13 @@ struct dll_target  : public target_t {
       void end_design(const Design*);
 
       bool bufz(const NetBUFZ*);
+      void event(const NetEvent*);
+      void logic(const NetLogic*);
       bool net_const(const NetConst*);
+      void net_probe(const NetEvProbe*);
 
       bool process(const NetProcTop*);
+      void scope(const NetScope*);
 
       void*dll_;
       string dll_path_;
@@ -61,10 +69,14 @@ struct dll_target  : public target_t {
       start_design_f start_design_;
       end_design_f   end_design_;
 
-      net_bufz_f     net_bufz_;
-      net_const_f    net_const_;
+      net_bufz_f   net_bufz_;
+      net_const_f  net_const_;
+      net_event_f  net_event_;
+      net_logic_f  net_logic_;
+      net_probe_f  net_probe_;
 
-      process_f      process_;
+      process_f    process_;
+      scope_f      scope_;
 
 } dll_target_obj;
 
@@ -82,9 +94,14 @@ 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");
-      process_      = (process_f)     dlsym(dll_, "target_process");
+
+      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");
 
       (start_design_)(&ivl_des);
       return true;
@@ -111,6 +128,32 @@ bool dll_target::bufz(const NetBUFZ*net)
       return false;
 }
 
+void dll_target::event(const NetEvent*net)
+{
+      if (net_event_) {
+	    (net_event_)(net->full_name().c_str(), 0);
+
+      } else {
+	    cerr << dll_path_ << ": internal error: target DLL lacks "
+		 << "target_net_event function." << endl;
+      }
+
+      return;
+}
+
+void dll_target::logic(const NetLogic*net)
+{
+      if (net_logic_) {
+	    (net_logic_)(net->name().c_str(), 0);
+
+      } else {
+	    cerr << dll_path_ << ": internal error: target DLL lacks "
+		 << "target_net_logic function." << endl;
+      }
+
+      return;
+}
+
 bool dll_target::net_const(const NetConst*net)
 {
       struct ivl_net_const_s obj;
@@ -130,6 +173,21 @@ bool dll_target::net_const(const NetConst*net)
       return false;
 }
 
+void dll_target::net_probe(const NetEvProbe*net)
+{
+      if (net_probe_) {
+	    int rc = (net_probe_)(net->name().c_str(), 0);
+	    return;
+
+      } else {
+	    cerr << dll_path_ << ": internal error: target DLL lacks "
+		 << "target_net_probe function." << endl;
+	    return;
+      }
+
+      return;
+}
+
 bool dll_target::process(const NetProcTop*net)
 {
       struct ivl_process_s obj;
@@ -149,6 +207,16 @@ bool dll_target::process(const NetProcTop*net)
       return false;
 }
 
+void dll_target::scope(const NetScope*net)
+{
+      struct ivl_scope_s obj;
+
+      obj.scope_ = net;
+
+      if (scope_)
+	    (scope_)(&obj);
+}
+
 extern const struct target tgt_dll = { "dll", &dll_target_obj };
 
 
@@ -161,6 +229,9 @@ extern "C" const char*ivl_get_flag(ivl_design_t des, const char*key)
 
 /*
  * $Log: t-dll.cc,v $
+ * Revision 1.3  2000/08/19 18:12:42  steve
+ *  Add target calls for scope, events and logic.
+ *
  * Revision 1.2  2000/08/14 04:39:57  steve
  *  add th t-dll functions for net_const, net_bufz and processes.
  *
diff --git a/tgt-stub/stub.c b/tgt-stub/stub.c
index 2eaf29740..bf0cc23d9 100644
--- a/tgt-stub/stub.c
+++ b/tgt-stub/stub.c
@@ -17,7 +17,7 @@
  *    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
  */
 #if !defined(WINNT) && !defined(macintosh)
-#ident "$Id: stub.c,v 1.2 2000/08/14 04:39:57 steve Exp $"
+#ident "$Id: stub.c,v 1.3 2000/08/19 18:12:42 steve Exp $"
 #endif
 
 # include  <ivl_target.h>
@@ -60,6 +60,23 @@ int target_net_const(const char*name, ivl_net_const_t net)
       return 0;
 }
 
+int target_net_event(const char*name, ivl_net_event_t net)
+{
+      fprintf(out, "STUB: %s: event\n", name);
+      return 0;
+}
+
+int target_net_logic(const char*name, ivl_net_logic_t net)
+{
+      fprintf(out, "STUB: %s: logic gate\n", name);
+      return 0;
+}
+
+int target_net_probe(const char*name, ivl_net_probe_t net)
+{
+      fprintf(out, "STUB: %s: probe\n", name);
+      return 0;
+}
 int target_process(ivl_process_t net)
 {
       fprintf(out, "STUB: process\n");
@@ -68,6 +85,9 @@ int target_process(ivl_process_t net)
 
 /*
  * $Log: stub.c,v $
+ * Revision 1.3  2000/08/19 18:12:42  steve
+ *  Add target calls for scope, events and logic.
+ *
  * Revision 1.2  2000/08/14 04:39:57  steve
  *  add th t-dll functions for net_const, net_bufz and processes.
  *