diff --git a/src/circuit/ChangeLog b/src/circuit/ChangeLog
index e4c7f2912..04b359876 100644
--- a/src/circuit/ChangeLog
+++ b/src/circuit/ChangeLog
@@ -1,8 +1,10 @@
-2000-05-21  Paolo Nenzi <p.nenzi@ieee.org>
-
-	* inp2r.c: Modified ac parameter parsing code to conform to
-	           spice parameter parsing format
+2000-05-22  Paolo Nenzi <p.nenzi@ieee.org>
 
+	* inp2dot.c: Applied Widlok patch.
+	* inpdoopt.c: Applied Widolok patch:commented the entire function, 
+	              seems obsolete.
+	* inpptree.c, ptfuncs.c: Applied Widlok patch. Now there is a
+	                         new step function called u2.
 2000-04-04  Paolo Nenzi <p.nenzi@ieee.org>
     
 	* inpfindl.c: Modified the file for BSIM4 and future extensions to
diff --git a/src/circuit/inp2dot.c b/src/circuit/inp2dot.c
index 722b172f8..45e946c7b 100644
--- a/src/circuit/inp2dot.c
+++ b/src/circuit/inp2dot.c
@@ -448,14 +448,18 @@ char *word;     /* something to stick a word of input into */
         /* not allowed to pay attention to additional input - return */
         return(1);
         /*NOTREACHED*/
+/* MW. .options is handled before - this is not needed    
     } else if ( (strcmp(token,".options")==0) ||
             (strcmp(token,".option")==0) ||
             (strcmp(token,".opt")==0) ){
-        /* .option - specify program options - rather complicated */
-        /* use a subroutine to handle all of them to keep this */
-        /* subroutine managable */
+        * .option - specify program options - rather complicated /
+        * use a subroutine to handle all of them to keep this /
+        * subroutine managable /
         INPdoOpts(ckt,ft_curckt->ci_curOpt,current,tab);
         return(0);
+INPdoOpts is never called (I hope) */
+
+
     } else if (strcmp(token, ".sens") == 0) {
       which = -1; /* Bug fix from Glao Dezai */
         for(i=0;i<ft_sim->numAnalyses;i++) {
diff --git a/src/circuit/inpdoopt.c b/src/circuit/inpdoopt.c
index baa937ee4..9058994e3 100644
--- a/src/circuit/inpdoopt.c
+++ b/src/circuit/inpdoopt.c
@@ -16,6 +16,7 @@ Author: 1985 Thomas L. Quarles
 #include "fteext.h"
 #include "inp.h"
 
+/* MW. this is never called - look at inp2dot.c
 void
 INPdoOpts(void *ckt, void *anal, card *optCard, INPtables *tab)
 {
@@ -44,7 +45,7 @@ INPdoOpts(void *ckt, void *anal, card *optCard, INPtables *tab)
         return;
     }
     line = optCard->line;
-    INPgetTok(&line,&token,1);    /* throw away '.option' */
+    INPgetTok(&line,&token,1);    * throw away '.option' *
     while (*line) {
         INPgetTok(&line,&token,1);
         for(i=0;i<prm->numParms;i++) {
@@ -80,3 +81,4 @@ INPdoOpts(void *ckt, void *anal, card *optCard, INPtables *tab)
         }
     }
 }
+*/
diff --git a/src/circuit/inpptree.c b/src/circuit/inpptree.c
index a438bf188..83b8e014f 100644
--- a/src/circuit/inpptree.c
+++ b/src/circuit/inpptree.c
@@ -77,7 +77,9 @@ static struct func {
     { "tanh",   PTF_TANH,   PTtanh } ,
     { "u",   	PTF_USTEP,  PTustep } ,
     { "uramp",  PTF_URAMP,  PTuramp } ,
-    { "-",      PTF_UMINUS, PTuminus }
+    { "-",      PTF_UMINUS, PTuminus },
+    /* MW. cif function added */
+    { "u2",	PTF_USTEP2, PTustep2}
 } ;
 
 #define NUM_FUNCS (sizeof (funcs) / sizeof (struct func))
@@ -329,6 +331,11 @@ PTdifferentiate(INPparseNode *p, int varnum)
 	    arg1 = mkf(PTF_USTEP, p->left);
             break;
 
+/* MW. PTF_CIF for new cif function */
+	case PTF_USTEP2:
+	    arg1 = mkcon((double) 0.0);
+	    break;
+	    
         case PTF_UMINUS:    /* - 1 ; like a constant (was 0 !) */
             arg1 = mkcon((double) - 1.0);
             break;
@@ -896,6 +903,10 @@ PTlexer(char **line)
     char *sbuf, *s;
 
     sbuf = *line;
+#ifdef notdef
+    printf("entering lexer, sbuf = '%s', lastoken = %d, lasttype = %d\n", 
+        sbuf, lasttoken, lasttype);
+#endif
     while ((*sbuf == ' ') || (*sbuf == '\t') || (*sbuf == '='))
         sbuf++;
 
@@ -987,7 +998,7 @@ PTlexer(char **line)
     return (&el);
 }
 
-#if 0
+#ifdef notdef
 
 /* Debugging stuff. */