diff --git a/Makefile b/Makefile
index 08225bd..fc88e53 100644
--- a/Makefile
+++ b/Makefile
@@ -11,7 +11,7 @@ cpu.o: cpu.cpp cpu.h addressbus.h nodes.h
 
 nodes.o: nodes.cpp nodes.h
 
-trans.o: trans.cpp trans.h SegmentCache.h
+trans.o: trans.cpp trans.h
 
 SegmentCache.o: SegmentCache.cpp SegmentCache.h
 
@@ -20,3 +20,4 @@ TransNetwork.o: TransNetwork.cpp TransNetwork.h trans.h
 clean:
 	-rm *.o
 	-rm v6502
+	-rm v6502.exe
diff --git a/SegmentCache.cpp b/SegmentCache.cpp
index 1a2bcad..934a0be 100644
--- a/SegmentCache.cpp
+++ b/SegmentCache.cpp
@@ -9,7 +9,6 @@
 #include <memory>
 #include <string>
 #include <map>
-#include <algorithm>
 
 Segment* SegmentCache::getOrAdd(std::string& id) {
     if (this->cache.find(id) == this->cache.end()) {
diff --git a/TransNetwork.cpp b/TransNetwork.cpp
index 337e6c8..298d9a4 100644
--- a/TransNetwork.cpp
+++ b/TransNetwork.cpp
@@ -7,21 +7,16 @@
 
 #include "TransNetwork.h"
 #include "trans.h"
-#include "SegmentCache.h"
+#include <memory>
 #include <iostream>
 
-TransNetwork::TransNetwork(std::istream& readFromHere) {
-    SegmentCache segs;
-
+TransNetwork::TransNetwork(std::istream& in) {
     std::string c1, gate, c2;
-    readFromHere >> c1 >> gate >> c2;
-    while (readFromHere.good()) {
-        Trans trans(segs.getOrAdd(c1), segs.getOrAdd(gate), segs.getOrAdd(c2));
-        std::cout << trans;
-
-        readFromHere >> c1 >> gate >> c2;
+    in >> c1 >> gate >> c2;
+    while (in.good()) {
+        this->transes.insert(std::make_shared<Trans>(this->segs.getOrAdd(c1), this->segs.getOrAdd(gate), this->segs.getOrAdd(c2)));
+        in >> c1 >> gate >> c2;
     }
-    std::cout << std::endl << "done" << std::endl;
 }
 
 TransNetwork::~TransNetwork() {
diff --git a/TransNetwork.h b/TransNetwork.h
index 21f7ac3..caad451 100644
--- a/TransNetwork.h
+++ b/TransNetwork.h
@@ -8,9 +8,15 @@
 #ifndef TRANSNETWORK_H
 #define	TRANSNETWORK_H
 
+#include "trans.h"
+#include "SegmentCache.h"
 #include <istream>
 
 class TransNetwork {
+private:
+    SegmentCache segs;
+    std::set<std::shared_ptr<Trans>> transes;
+
 public:
     TransNetwork(std::istream& readFromHere);
     virtual ~TransNetwork();
diff --git a/cpu.cpp b/cpu.cpp
index 0a10264..a4d3a38 100644
--- a/cpu.cpp
+++ b/cpu.cpp
@@ -110,13 +110,13 @@ addressBus(addressBus) {
 
     for (int i = 0; i != trns.size(); ++i) {
         trn& t = trns[i];
-        if (t.c1 == n->VSS) {
-            t.c1 = t.c2;
-            t.c2 = n->VSS;
-        } else if (t.c1 == n->VCC) {
-            t.c1 = t.c2;
-            t.c2 = n->VCC;
-        }
+//        if (t.c1 == n->VSS) {
+//            t.c1 = t.c2;
+//            t.c2 = n->VSS;
+//        } else if (t.c1 == n->VCC) {
+//            t.c1 = t.c2;
+//            t.c2 = n->VCC;
+//        }
         segs[t.gate].gates.push_back(i);
         segs[t.c1].c1c2s.push_back(i);
         segs[t.c2].c1c2s.push_back(i);
diff --git a/trans.cpp b/trans.cpp
index ef07706..7b92dd8 100644
--- a/trans.cpp
+++ b/trans.cpp
@@ -6,5 +6,3 @@
  */
 
 #include "trans.h"
-#include "SegmentCache.h"
-#include <istream>
diff --git a/trans.h b/trans.h
index 8d38152..0e4dabc 100644
--- a/trans.h
+++ b/trans.h
@@ -9,23 +9,21 @@
 #define	TRANS_H
 
 #include <string>
-#include <vector>
-#include <iostream>
+#include <set>
 
 class Trans;
-class SegmentCache;
 
 class Segment {
 public:
     std::string id;
-    std::vector<Trans*> gates;
-    std::vector<Trans*> c1c2s;
+    std::set<Trans*> gates;
+    std::set<Trans*> c1c2s;
 
     bool pullup;
     bool pulldown;
     bool on;
 
-    Segment(std::string& id) : id(id) {
+    Segment(std::string& id) : id(id), on(false), pulldown(false), pullup(id[0] == '+') {
     }
 };
 
@@ -39,6 +37,9 @@ private:
 
 public:
     Trans(Segment* c1, Segment* gate, Segment* c2) : on(false), c1(c1), gate(gate), c2(c2) {
+        c1->c1c2s.insert(this);
+        gate->gates.insert(this);
+        c2->c1c2s.insert(this);
     }
 
     virtual ~Trans() {
diff --git a/v6502.cpp b/v6502.cpp
index e06f515..653461f 100644
--- a/v6502.cpp
+++ b/v6502.cpp
@@ -37,7 +37,7 @@
 //    }
 //}
 
-int main(int argc, char *argv[]) {
+int xxxmain(int argc, char *argv[]) {
     std::ifstream if_trans("transistors");
     if (!if_trans.is_open()) {
         std::cerr << "error opening file: transistors" << std::endl;
@@ -46,7 +46,7 @@ int main(int argc, char *argv[]) {
     TransNetwork n(if_trans);
 }
 
-int xxxmain(int argc, char *argv[]) {
+int main(int argc, char *argv[]) {
     AddressBus mem;
     CPU cpu(mem);