Index: config_gram.y
===================================================================
--- config_gram.y	(revision 1045)
+++ config_gram.y	(working copy)
@@ -64,6 +64,8 @@
 static int parse_cmdbits(OPCODE * op);
 
 static int pin_name;
+static AVRPART * parent_part = NULL;
+static FILE* dot_parts;
 %}
 
 %token K_READ
@@ -248,7 +250,17 @@
 %%
 
 configuration :
-  /* empty */ | config
+  /* empty */ | 
+  {
+    char buf[1024];
+    strcpy(buf,infile);
+    strcat(buf,".parts.dot");
+    dot_parts = fopen(buf,"w");
+    fprintf(dot_parts," digraph parts { rankdir=LR; ordering=out; node [shape=box,style=filled];\n");
+  } config {
+    fprintf(dot_parts,"   }\n");
+    fclose(dot_parts);
+  }
 ;
 
 config :
@@ -403,7 +415,21 @@
         lrmv_d(part_list, existing_part);
         avr_free_part(existing_part);
       }
-      PUSH(part_list, current_part); 
+      PUSH(part_list, current_part);
+      {
+        int lines = lineno-current_part->lineno;
+        if (lines > 255) lines = 255;
+        fprintf(dot_parts,"  \"%-16s\" [label=\"%s\\n%02x %02x %02x\",fillcolor=\"#ff%02x%02x\"];\n",
+                current_part->id,
+                current_part->id,
+                current_part->signature[0],
+                current_part->signature[1],
+                current_part->signature[2],
+                255-lines,
+                255-lines);
+        if(parent_part!=NULL)
+          fprintf(dot_parts,"  \"%-16s\" -> \"%-16s\";\n",parent_part->id,current_part->id);
+      }
       current_part = NULL; 
     }
 ;
@@ -414,10 +440,11 @@
       current_part = avr_new_part();
       strcpy(current_part->config_file, infile);
       current_part->lineno = lineno;
+      parent_part = NULL;
     } |
   K_PART K_PARENT TKN_STRING 
     {
-      AVRPART * parent_part = locate_part(part_list, $3->value.string);
+      parent_part = locate_part(part_list, $3->value.string);
       if (parent_part == NULL) {
         fprintf(stderr, 
               "%s: error at %s:%d: can't find parent part",