diff --git a/Makefile b/Makefile
index fc88e53..92d6c9a 100644
--- a/Makefile
+++ b/Makefile
@@ -2,7 +2,7 @@ CXXFLAGS=-g -std=c++11
 
 all: v6502
 
-v6502: v6502.o cpu.o nodes.o trans.o SegmentCache.o TransNetwork.o
+v6502: v6502.o cpu.o nodes.o trans.o SegmentCache.o TransNetwork.o Trace.o
 	g++ $^ -o $@
 
 v6502.o: v6502.cpp cpu.h addressbus.h TransNetwork.h 
@@ -17,6 +17,8 @@ SegmentCache.o: SegmentCache.cpp SegmentCache.h
 
 TransNetwork.o: TransNetwork.cpp TransNetwork.h trans.h
 
+Trace.o: Trace.cpp Trace.h SegmentCache.h
+
 clean:
 	-rm *.o
 	-rm v6502
diff --git a/SegmentCache.cpp b/SegmentCache.cpp
index 934a0be..872bc71 100644
--- a/SegmentCache.cpp
+++ b/SegmentCache.cpp
@@ -1,18 +1,104 @@
-/* 
- * File:   SegmentCache.cpp
- * Author: cmosher
- * 
- * Created on December 10, 2013, 9:56 PM
- */
-
-#include "SegmentCache.h"
-#include <memory>
-#include <string>
-#include <map>
-
-Segment* SegmentCache::getOrAdd(std::string& id) {
-    if (this->cache.find(id) == this->cache.end()) {
-        this->cache[id] = std::make_shared<Segment>(id);
-    }
-    return this->cache[id].get();
-}
+/* 
+ * File:   SegmentCache.cpp
+ * Author: cmosher
+ * 
+ * Created on December 10, 2013, 9:56 PM
+ */
+
+#include "SegmentCache.h"
+#include <memory>
+#include <string>
+#include <map>
+
+Segment* SegmentCache::getOrAdd(const std::string& id) {
+    if (this->cache.find(id) == this->cache.end()) {
+        this->cache[id] = std::make_shared<Segment>(id);
+    }
+    return get(id);
+}
+
+Segment* SegmentCache::get(const std::string& id) const {
+    if (this->cache.find(id) == this->cache.end()) {
+        throw "Cannot find segment: " + id;
+    }
+    return this->cache.at(id).get();
+}
+
+void SegmentCache::initCommon() {
+    this->c = new Common(
+            get("-vss"), get("+vcc"),
+            get("-clk0"),
+            get("-irq"), get("-res"), get("-nmi"),
+            get("+rdy"), get("+so"),
+            get("-db0"), get("-db1"), get("-db2"), get("-db3"), get("-db4"), get("-db5"), get("-db6"), get("-db7"),
+            get("-ab0"), get("-ab1"), get("-ab2"), get("-ab3"), get("-ab4"), get("-ab5"), get("-ab6"), get("-ab7"),
+            get("-ab8"), get("-ab9"), get("-ab10"), get("-ab11"), get("-ab12"), get("-ab13"), get("-ab14"), get("-ab15"),
+            get("-rw"), get("-sync"),
+            get("-clk1out"), get("-clk2out"),
+            get("-a0"), get("-a1"), get("-a2"), get("-a3"), get("-a4"), get("-a5"), get("-a6"), get("-a7"),
+            get("-x0"), get("-x1"), get("-x2"), get("-x3"), get("-x4"), get("-x5"), get("-x6"), get("-x7"),
+            get("-y0"), get("-y1"), get("-y2"), get("-y3"), get("-y4"), get("-y5"), get("-y6"), get("-y7"),
+            get("-pcl0"), get("-pcl1"), get("-pcl2"), get("-pcl3"), get("-pcl4"), get("-pcl5"), get("-pcl6"), get("-pcl7"),
+            get("-pch0"), get("-pch1"), get("-pch2"), get("-pch3"), get("-pch4"), get("-pch5"), get("-pch6"), get("-pch7"),
+            get("+Pout0"), get("+Pout1"), get("+Pout2"), get("+Pout3"), get("+Pout4"), /*no P5 */get("+Pout6"), get("+Pout7"),
+            get("-s0"), get("-s1"), get("-s2"), get("-s3"), get("-s4"), get("-s5"), get("-s6"), get("-s7"));
+}
+
+unsigned char SegmentCache::rData() const {
+    return Segment::asByte(this->c->DB7, this->c->DB6, this->c->DB5, this->c->DB4, this->c->DB3, this->c->DB2, this->c->DB1, this->c->DB0);
+}
+
+unsigned short SegmentCache::rAddr() const {
+    return Segment::asWord(this->c->AB15, this->c->AB14, this->c->AB13, this->c->AB12, this->c->AB11, this->c->AB10, this->c->AB9, this->c->AB8, this->c->AB7, this->c->AB6, this->c->AB5, this->c->AB4, this->c->AB3, this->c->AB2, this->c->AB1, this->c->AB0);
+}
+
+unsigned char SegmentCache::rA() const {
+    return Segment::asByte(this->c->A7, this->c->A6, this->c->A5, this->c->A4, this->c->A3, this->c->A2, this->c->A1, this->c->A0);
+}
+
+unsigned char SegmentCache::rX() const {
+    return Segment::asByte(this->c->X7, this->c->X6, this->c->X5, this->c->X4, this->c->X3, this->c->X2, this->c->X1, this->c->X0);
+}
+
+unsigned char SegmentCache::rY() const {
+    return Segment::asByte(this->c->Y7, this->c->Y6, this->c->Y5, this->c->Y4, this->c->Y3, this->c->Y2, this->c->Y1, this->c->Y0);
+}
+
+unsigned char SegmentCache::rS() const {
+    return Segment::asByte(this->c->S7, this->c->S6, this->c->S5, this->c->S4, this->c->S3, this->c->S2, this->c->S1, this->c->S0);
+}
+
+unsigned short SegmentCache::rPC() const {
+    return Segment::asWord(this->c->PCH7, this->c->PCH6, this->c->PCH5, this->c->PCH4, this->c->PCH3, this->c->PCH2, this->c->PCH1, this->c->PCH0, this->c->PCL7, this->c->PCL6, this->c->PCL5, this->c->PCL4, this->c->PCL3, this->c->PCL2, this->c->PCL1, this->c->PCL0);
+}
+
+void SegmentCache::setDataSegs(const unsigned char data) {
+    unsigned char x = data;
+
+    this->c->DB0->set(x & 1);
+    x >>= 1;
+    this->c->DB1->set(x & 1);
+    x >>= 1;
+    this->c->DB2->set(x & 1);
+    x >>= 1;
+    this->c->DB3->set(x & 1);
+    x >>= 1;
+    this->c->DB4->set(x & 1);
+    x >>= 1;
+    this->c->DB5->set(x & 1);
+    x >>= 1;
+    this->c->DB6->set(x & 1);
+    x >>= 1;
+    this->c->DB7->set(x & 1);
+}
+
+void SegmentCache::addDataToRecalc(std::set<Segment*>& s) {
+    s.insert(this->c->DB0);
+    s.insert(this->c->DB1);
+    s.insert(this->c->DB2);
+    s.insert(this->c->DB3);
+    s.insert(this->c->DB4);
+    s.insert(this->c->DB5);
+    s.insert(this->c->DB6);
+    s.insert(this->c->DB7);
+}
diff --git a/SegmentCache.h b/SegmentCache.h
index 8f49772..e166d4d 100644
--- a/SegmentCache.h
+++ b/SegmentCache.h
@@ -1,30 +1,185 @@
-/* 
- * File:   SegmentCache.h
- * Author: Christopher
- *
- * Created on December 10, 2013, 9:56 PM
- */
-
-#ifndef SEGMENTCACHE_H
-#define	SEGMENTCACHE_H
-
-#include "trans.h"
-#include <memory>
-#include <string>
-#include <map>
-
-class SegmentCache {
-public:
-    SegmentCache() {}
-    virtual ~SegmentCache() {}
-
-    Segment* getOrAdd(std::string& id);
-
-private:
-    std::map<std::string,std::shared_ptr<Segment>> cache;
-
-    SegmentCache(const SegmentCache&);
-    SegmentCache& operator=(const SegmentCache&);
-};
-
-#endif	/* SEGMENTCACHE_H */
+/* 
+ * File:   SegmentCache.h
+ * Author: Christopher
+ *
+ * Created on December 10, 2013, 9:56 PM
+ */
+
+#ifndef SEGMENTCACHE_H
+#define	SEGMENTCACHE_H
+
+#include "trans.h"
+#include <memory>
+#include <string>
+#include <map>
+#include <set>
+
+class SegmentCache {
+public:
+
+    SegmentCache() {
+    }
+
+    virtual ~SegmentCache() {
+    }
+
+    Segment* getOrAdd(const std::string& id);
+    Segment* get(const std::string& id) const;
+
+    class Common {
+    public:
+        Segment* VSS;
+        Segment* VCC;
+        Segment* CLK0;
+        Segment* IRQ;
+        Segment* RES;
+        Segment* NMI;
+        Segment* RDY;
+        Segment* SO;
+        Segment* DB0;
+        Segment* DB1;
+        Segment* DB2;
+        Segment* DB3;
+        Segment* DB4;
+        Segment* DB5;
+        Segment* DB6;
+        Segment* DB7;
+        Segment* AB0;
+        Segment* AB1;
+        Segment* AB2;
+        Segment* AB3;
+        Segment* AB4;
+        Segment* AB5;
+        Segment* AB6;
+        Segment* AB7;
+        Segment* AB8;
+        Segment* AB9;
+        Segment* AB10;
+        Segment* AB11;
+        Segment* AB12;
+        Segment* AB13;
+        Segment* AB14;
+        Segment* AB15;
+        Segment* RW;
+        Segment* SYNC;
+        Segment* CLK1OUT;
+        Segment* CLK2OUT;
+        Segment* A0;
+        Segment* A1;
+        Segment* A2;
+        Segment* A3;
+        Segment* A4;
+        Segment* A5;
+        Segment* A6;
+        Segment* A7;
+        Segment* X0;
+        Segment* X1;
+        Segment* X2;
+        Segment* X3;
+        Segment* X4;
+        Segment* X5;
+        Segment* X6;
+        Segment* X7;
+        Segment* Y0;
+        Segment* Y1;
+        Segment* Y2;
+        Segment* Y3;
+        Segment* Y4;
+        Segment* Y5;
+        Segment* Y6;
+        Segment* Y7;
+        Segment* PCL0;
+        Segment* PCL1;
+        Segment* PCL2;
+        Segment* PCL3;
+        Segment* PCL4;
+        Segment* PCL5;
+        Segment* PCL6;
+        Segment* PCL7;
+        Segment* PCH0;
+        Segment* PCH1;
+        Segment* PCH2;
+        Segment* PCH3;
+        Segment* PCH4;
+        Segment* PCH5;
+        Segment* PCH6;
+        Segment* PCH7;
+        Segment* P0;
+        Segment* P1;
+        Segment* P2;
+        Segment* P3;
+        Segment* P4;
+        Segment* P6;
+        Segment* P7;
+        Segment* S0;
+        Segment* S1;
+        Segment* S2;
+        Segment* S3;
+        Segment* S4;
+        Segment* S5;
+        Segment* S6;
+        Segment* S7;
+
+        Common(
+                Segment* VSS, Segment* VCC,
+                Segment* CLK0,
+                Segment* IRQ, Segment* RES, Segment* NMI,
+                Segment* RDY, Segment* SO,
+                Segment* DB0, Segment* DB1, Segment* DB2, Segment* DB3, Segment* DB4, Segment* DB5, Segment* DB6, Segment* DB7,
+                Segment* AB0, Segment* AB1, Segment* AB2, Segment* AB3, Segment* AB4, Segment* AB5, Segment* AB6, Segment* AB7,
+                Segment* AB8, Segment* AB9, Segment* AB10, Segment* AB11, Segment* AB12, Segment* AB13, Segment* AB14, Segment* AB15,
+                Segment* RW, Segment* SYNC,
+                Segment* CLK1OUT, Segment* CLK2OUT,
+                Segment* A0, Segment* A1, Segment* A2, Segment* A3, Segment* A4, Segment* A5, Segment* A6, Segment* A7,
+                Segment* X0, Segment* X1, Segment* X2, Segment* X3, Segment* X4, Segment* X5, Segment* X6, Segment* X7,
+                Segment* Y0, Segment* Y1, Segment* Y2, Segment* Y3, Segment* Y4, Segment* Y5, Segment* Y6, Segment* Y7,
+                Segment* PCL0, Segment* PCL1, Segment* PCL2, Segment* PCL3, Segment* PCL4, Segment* PCL5, Segment* PCL6, Segment* PCL7,
+                Segment* PCH0, Segment* PCH1, Segment* PCH2, Segment* PCH3, Segment* PCH4, Segment* PCH5, Segment* PCH6, Segment* PCH7,
+                Segment* P0, Segment* P1, Segment* P2, Segment* P3, Segment* P4, /* no P5 */ Segment* P6, Segment* P7,
+                Segment* S0, Segment* S1, Segment* S2, Segment* S3, Segment* S4, Segment* S5, Segment* S6, Segment* S7) :
+        VSS(VSS), VCC(VCC),
+        CLK0(CLK0),
+        IRQ(IRQ), RES(RES), NMI(NMI),
+        RDY(RDY), SO(SO),
+        DB0(DB0), DB1(DB1), DB2(DB2), DB3(DB3), DB4(DB4), DB5(DB5), DB6(DB6), DB7(DB7),
+        AB0(AB0), AB1(AB1), AB2(AB2), AB3(AB3), AB4(AB4), AB5(AB5), AB6(AB6), AB7(AB7),
+        AB8(AB8), AB9(AB9), AB10(AB10), AB11(AB11), AB12(AB12), AB13(AB13), AB14(AB14), AB15(AB15),
+        RW(RW), SYNC(SYNC),
+        CLK1OUT(CLK1OUT), CLK2OUT(CLK2OUT),
+        A0(A0), A1(A1), A2(A2), A3(A3), A4(A4), A5(A5), A6(A6), A7(A7),
+        X0(X0), X1(X1), X2(X2), X3(X3), X4(X4), X5(X5), X6(X6), X7(X7),
+        Y0(Y0), Y1(Y1), Y2(Y2), Y3(Y3), Y4(Y4), Y5(Y5), Y6(Y6), Y7(Y7),
+        PCL0(PCL0), PCL1(PCL1), PCL2(PCL2), PCL3(PCL3), PCL4(PCL4), PCL5(PCL5), PCL6(PCL6), PCL7(PCL7),
+        PCH0(PCH0), PCH1(PCH1), PCH2(PCH2), PCH3(PCH3), PCH4(PCH4), PCH5(PCH5), PCH6(PCH6), PCH7(PCH7),
+        P0(P0), P1(P1), P2(P2), P3(P3), P4(P4), /* no P5 */ P6(P6), P7(P7),
+        S0(S0), S1(S1), S2(S2), S3(S3), S4(S4), S5(S5), S6(S6), S7(S7) {
+        }
+        ~Common();
+
+    private:
+        Common(const Common&);
+        Common& operator=(const Common&);
+    };
+
+    void initCommon();
+    Common* c;
+
+    unsigned char rData() const;
+    unsigned short rAddr() const;
+    unsigned char rA() const;
+    unsigned char rX() const;
+    unsigned char rY() const;
+    unsigned char rS() const;
+    unsigned short rPC() const;
+
+    void setDataSegs(const unsigned char data);
+    void addDataToRecalc(std::set<Segment*>& s);
+
+private:
+    std::map<const std::string, std::shared_ptr<Segment > > cache;
+
+    SegmentCache(const SegmentCache&);
+    SegmentCache& operator=(const SegmentCache&);
+};
+
+#endif	/* SEGMENTCACHE_H */
diff --git a/Trace.cpp b/Trace.cpp
new file mode 100644
index 0000000..45e73eb
--- /dev/null
+++ b/Trace.cpp
@@ -0,0 +1,79 @@
+/* 
+ * File:   Trace.cpp
+ * Author: cmosher
+ * 
+ * Created on December 12, 2013, 3:39 PM
+ */
+
+#include "Trace.h"
+#include "SegmentCache.h"
+#include <iostream>
+#include <iomanip>
+
+static void pHex(const unsigned char x) {
+    std::cout << std::setw(2) << std::setfill('0') << std::hex << (unsigned long) x << std::dec;
+}
+
+static void pHexw(const unsigned short x) {
+    std::cout << std::setw(4) << std::setfill('0') << std::hex << (unsigned long) x << std::dec;
+}
+
+void Trace::dumpSegments() {
+//    for (int i = 0; i < segs.size(); ++i) {
+//        seg& s = segs[i];
+//        if (s.pullup) {
+//            std::cout << "U";
+//        } else if (s.pulldown) {
+//            std::cout << "D";
+//        } else {
+//            std::cout << "f";
+//        }
+//        if (s->on) {
+//            std::cout << "+";
+//        } else {
+//            std::cout << "-";
+//        }
+//    }
+//    std::cout << std::endl;
+}
+
+void Trace::dumpRegisters() {
+    std::cout << "A";
+    pHex(s.rA());
+    std::cout << " X";
+    pHex(s.rX());
+    std::cout << " Y";
+    pHex(s.rY());
+    std::cout << " ";
+    std::cout << (s.c->P7->on ? "N" : "n");
+    std::cout << (s.c->P6->on ? "V" : "v");
+    std::cout << ".";
+    std::cout << (s.c->P4->on ? "B" : "b");
+    std::cout << (s.c->P3->on ? "D" : "d");
+    std::cout << (s.c->P2->on ? "I" : "i");
+    std::cout << (s.c->P1->on ? "Z" : "z");
+    std::cout << (s.c->P0->on ? "C" : "c");
+    std::cout << " S";
+    pHex(s.rS());
+    std::cout << " PC";
+    pHexw(s.rPC());
+    if (s.c->CLK1OUT->on) {
+        std::cout << "  PH1  ";
+    }
+    if (s.c->CLK2OUT->on) {
+        std::cout << "  PH2";
+        if (s.c->RW->on) {
+            std::cout << " R";
+        } else {
+            std::cout << " W";
+        }
+    }
+    if (!(s.c->CLK1OUT->on || s.c->CLK2OUT->on)) {
+        std::cout << "  PH-  ";
+    }
+    std::cout << " DB";
+    pHex(s.rData());
+    std::cout << " AB";
+    pHexw(s.rAddr());
+    std::cout << std::endl;
+}
diff --git a/Trace.h b/Trace.h
new file mode 100644
index 0000000..2f3735e
--- /dev/null
+++ b/Trace.h
@@ -0,0 +1,28 @@
+/* 
+ * File:   Trace.h
+ * Author: cmosher
+ *
+ * Created on December 12, 2013, 3:39 PM
+ */
+
+#ifndef TRACE_H
+#define	TRACE_H
+
+class SegmentCache;
+
+class Trace {
+public:
+    Trace(const SegmentCache& s) : s(s) {}
+    virtual ~Trace() {}
+
+    void dumpSegments();
+    void dumpRegisters();
+
+private:
+    Trace(const Trace&);
+    Trace& operator=(const Trace&);
+
+    const SegmentCache& s;
+};
+
+#endif	/* TRACE_H */
diff --git a/TransNetwork.cpp b/TransNetwork.cpp
index 298d9a4..b9f3db1 100644
--- a/TransNetwork.cpp
+++ b/TransNetwork.cpp
@@ -17,6 +17,8 @@ TransNetwork::TransNetwork(std::istream& in) {
         this->transes.insert(std::make_shared<Trans>(this->segs.getOrAdd(c1), this->segs.getOrAdd(gate), this->segs.getOrAdd(c2)));
         in >> c1 >> gate >> c2;
     }
+
+    this->segs.initCommon();
 }
 
 TransNetwork::~TransNetwork() {
diff --git a/TransNetwork.h b/TransNetwork.h
index caad451..838df67 100644
--- a/TransNetwork.h
+++ b/TransNetwork.h
@@ -13,7 +13,7 @@
 #include <istream>
 
 class TransNetwork {
-private:
+public:
     SegmentCache segs;
     std::set<std::shared_ptr<Trans>> transes;
 
diff --git a/cpu.cpp b/cpu.cpp
index a4d3a38..285fd34 100644
--- a/cpu.cpp
+++ b/cpu.cpp
@@ -14,6 +14,7 @@
 
 #include "nodes.h"
 #include "addressbus.h"
+#include "SegmentCache.h"
 
 
 
@@ -210,8 +211,7 @@ void CPU::step() {
      */
     const bool nextPhase = !segs[n->CLK0].on;
 
-    setSeg(n->CLK0, nextPhase);
-    recalc(n->CLK0);
+    clock(nextPhase);
 
     // database read/write happens during Clock Phase 2 (only)
     if (segs[n->CLK2OUT].on) {
@@ -222,6 +222,11 @@ void CPU::step() {
     dumpSegs();
 }
 
+void CPU::clock(bool phase) {
+    setSeg(n->CLK0, phase);
+    recalc(n->CLK0);
+}
+
 void CPU::rw() {
     readBus();
 
diff --git a/cpu.h b/cpu.h
index efedf6c..440ff8c 100644
--- a/cpu.h
+++ b/cpu.h
@@ -62,13 +62,14 @@ private:
     unsigned char mRead(unsigned short addr);
     void mWrite(unsigned short addr, unsigned char data);
     void rw();
-    void step();
     void initPins();
 
 public:
     CPU(AddressBus& addressBus);
     ~CPU();
 
+    void step(); /* convenience method */
+    void clock(bool phase);
     void powerOn();
     void reset();
     void tick();
diff --git a/nodes.cpp b/nodes.cpp
index 0a46446..66c4176 100644
--- a/nodes.cpp
+++ b/nodes.cpp
@@ -13,7 +13,7 @@ nodes::nodes(std::map<std::string,int>& map_seg_i) {
     RES = map_seg_i["-res"];
     NMI = map_seg_i["-nmi"];
     RDY = map_seg_i["+rdy"];
-    SO = map_seg_i["+s0"];
+    SO = map_seg_i["+so"];
 
 /* data bus (I/O) */
     DB0 = map_seg_i["-db0"];
diff --git a/trans.cpp b/trans.cpp
index 7b92dd8..56996cb 100644
--- a/trans.cpp
+++ b/trans.cpp
@@ -6,3 +6,35 @@
  */
 
 #include "trans.h"
+
+unsigned char Segment::asByte(Segment* b7, Segment* b6, Segment* b5, Segment* b4, Segment* b3, Segment* b2, Segment* b1, Segment* b0) {
+    return
+        b7->on << 0x7 |
+        b6->on << 0x6 |
+        b5->on << 0x5 |
+        b4->on << 0x4 |
+        b3->on << 0x3 |
+        b2->on << 0x2 |
+        b1->on << 0x1 |
+        b0->on;
+}
+
+unsigned short Segment::asWord(Segment* bf, Segment* be, Segment* bd, Segment* bc, Segment* bb, Segment* ba, Segment* b9, Segment* b8, Segment* b7, Segment* b6, Segment* b5, Segment* b4, Segment* b3, Segment* b2, Segment* b1, Segment* b0) {
+    return
+        bf->on << 0xf |
+        be->on << 0xe |
+        bd->on << 0xd |
+        bc->on << 0xc |
+        bb->on << 0xb |
+        ba->on << 0xa |
+        b9->on << 0x9 |
+        b8->on << 0x8 |
+        b7->on << 0x7 |
+        b6->on << 0x6 |
+        b5->on << 0x5 |
+        b4->on << 0x4 |
+        b3->on << 0x3 |
+        b2->on << 0x2 |
+        b1->on << 0x1 |
+        b0->on;
+}
diff --git a/trans.h b/trans.h
index 0e4dabc..d75739c 100644
--- a/trans.h
+++ b/trans.h
@@ -23,8 +23,16 @@ public:
     bool pulldown;
     bool on;
 
-    Segment(std::string& id) : id(id), on(false), pulldown(false), pullup(id[0] == '+') {
+    Segment(const std::string& id) : id(id), on(false), pulldown(false), pullup(id[0] == '+') {
     }
+
+    void set(bool up) {
+        this->pullup = up;
+        this->pulldown = !up;
+    }
+
+    static unsigned char asByte(Segment* b7, Segment* b6, Segment* b5, Segment* b4, Segment* b3, Segment* b2, Segment* b1, Segment* b0);
+    static unsigned short asWord(Segment* b15, Segment* b14, Segment* b13, Segment* b12, Segment* b11, Segment* b10, Segment* b9, Segment* b8, Segment* b7, Segment* b6, Segment* b5, Segment* b4, Segment* b3, Segment* b2, Segment* b1, Segment* b0);
 };
 
 class Trans {
@@ -36,6 +44,7 @@ private:
     bool on;
 
 public:
+
     Trans(Segment* c1, Segment* gate, Segment* c2) : on(false), c1(c1), gate(gate), c2(c2) {
         c1->c1c2s.insert(this);
         gate->gates.insert(this);
diff --git a/v6502.cpp b/v6502.cpp
index 653461f..a163589 100644
--- a/v6502.cpp
+++ b/v6502.cpp
@@ -37,16 +37,18 @@
 //    }
 //}
 
-int xxxmain(int argc, char *argv[]) {
+int main(int argc, char *argv[]) {
     std::ifstream if_trans("transistors");
     if (!if_trans.is_open()) {
         std::cerr << "error opening file: transistors" << std::endl;
         exit(EXIT_FAILURE);
     }
-    TransNetwork n(if_trans);
+    TransNetwork tn(if_trans);
+    SegmentCache::Common* n = tn.segs.c;
+    n->CLK0->on = true;
 }
 
-int main(int argc, char *argv[]) {
+int xxxmain(int argc, char *argv[]) {
     AddressBus mem;
     CPU cpu(mem);