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diff --git a/src/edu/berkeley/slipway/demos/Demo.java b/src/edu/berkeley/slipway/demos/Demo.java
new file mode 100644
index 0000000..08f9ca6
--- /dev/null
+++ b/src/edu/berkeley/slipway/demos/Demo.java
@@ -0,0 +1,1096 @@
+package edu.berkeley.slipway.demos;
+
+import edu.berkeley.slipway.*;
+import com.atmel.fpslic.*;
+import static com.atmel.fpslic.FpslicConstants.*;
+import edu.berkeley.slipway.gui.*;
+import java.awt.*;
+import java.awt.event.*;
+import java.awt.color.*;
+import org.ibex.util.*;
+import java.io.*;
+import java.util.*;
+import gnu.io.*;
+
+public class Demo {
+
+    public static boolean mullers = true;
+    public static int masterx = 1;
+
+    public static int PIPELEN=20;
+
+    public static void main(String[] s) throws Exception {
+        SlipwayBoard slipway = new SlipwayBoard();
+        FpslicDevice device = slipway.getFpslicDevice();
+        FpslicDevice at40k = device;
+        try {
+            Log.info(Demo.class, "issuing command");
+
+            //at40k.iob_top(2, true).oe(false);
+            //at40k.iob_top(2, false).oe(false);
+            //at40k.iob_top(1, true).oe(false);
+
+            // this command confirmed to turn *on* led0
+            //at40k.iob_top(1, false).output(0);
+            /*
+              for(int i=0; i<20; i++) {
+              at40k.iob_bot(i, false).output(0);
+              at40k.iob_bot(i, true).output(0);
+              }
+            */
+
+            //System.out.println("tick");
+            //Thread.sleep(3000);
+            //System.out.println("tick");
+            //at40k.cell(0x01, 0x17).xlut((byte)0x);
+
+            /*
+              System.out.println(Integer.toString(0xff & at40k.cell(0x01, 0x17).xlut(), 16));
+              System.out.println(Integer.toString(0xff & at40k.cell(0x01, 0x17).ylut(), 16));
+              at40k.cell(0x01, 0x17).ylut((byte)0xff);
+            */
+
+            //at40k.cell(0x01, 0x17).wi(L1);
+            /*
+              System.out.println("a: " + at40k.new SectorWire(true, 0, 4, 0x17).driverRight());
+              System.out.println("b: " + at40k.new SectorWire(true, 1, 4, 0x17).driverRight());
+              FpslicDevice.SectorWire h0p0 = at40k.new SectorWire(true, 0, 0, 0x17);
+              FpslicDevice.SectorWire h0p1 = at40k.new SectorWire(true, 1, 0, 0x17);
+              FpslicDevice.SectorWire h0p2 = at40k.new SectorWire(true, 2, 0, 0x17);
+              FpslicDevice.SectorWire h4p0 = at40k.new SectorWire(true, 0, 4, 0x17);
+              FpslicDevice.SectorWire h4p1 = at40k.new SectorWire(true, 1, 4, 0x17);
+              FpslicDevice.SectorWire h4p2 = at40k.new SectorWire(true, 2, 4, 0x17);
+
+              //h4p1.drives(h0p1, false);
+              //at40k.cell(0x04, 0x17).out(L1, false);
+              //at40k.cell(0x04, 0x17).h(L0, false);
+
+              for(int plane=0; plane<5; plane++) {
+              at40k.new SectorWire(true, plane,     4, 0x17).drives(at40k.new SectorWire(true, plane,     0, 0x17), false);
+              at40k.cell(0x04, 0x17).out(plane, false);
+              at40k.cell(0x04, 0x17).h(plane, false);
+              at40k.cell(0x01, 0x17).h(plane, false);
+              }
+              try { Thread.sleep(2000); } catch (Exception e) { }
+
+              int plane=0;
+              at40k.new SectorWire(true, plane, 4, 0x17).drives(at40k.new SectorWire(true, plane, 0, 0x17), true);
+              at40k.cell(0x04, 0x17).out(plane, true);
+              at40k.cell(0x04, 0x17).h(plane, true);
+              at40k.cell(0x01, 0x17).h(plane, true);
+              at40k.cell(0x01, 0x17).wi(plane);
+
+            */
+
+            /*
+              System.out.println("xlut is " + hex(at40k.cell(0x04, 0x17).xlut()));
+              System.out.println("ylut is " + hex(at40k.cell(0x04, 0x17).ylut()));
+              FpslicDevice.Cell cell = at40k.cell(0x04, 0x17);
+              //cell.xlut(0xff);
+              //cell.f(false);
+              System.out.println(cell.c());
+              cell.c(YLUT);
+              cell.ylut(0x4D);
+              cell.xlut(0x00);
+
+              cell.b(false);
+              cell.f(false);
+              //cell.t(false, false, true);
+              cell.t(false, true, false);
+              cell.out(L3, true);
+              cell.wi(L3);
+
+              cell.yo(false);
+              cell.h(L0, false);
+              cell.h(L1, false);
+              cell.h(L2, false);
+              cell.h(L3, false);
+              cell.h(L4, false);
+
+              for(int i=3; i>=1; i--) {
+              at40k.cell(i, 0x17).yi(EAST);
+              at40k.cell(i, 0x17).ylut(0x55);
+              at40k.cell(i, 0x17).yo(false);
+              }
+            */
+
+            //System.out.println("reading port status: " + Integer.toString(device.readFpgaData() & 0xff, 16));
+
+
+            // blank these out
+            /*
+              at40k.cell(23, 8).ylut(0xff);
+              at40k.cell(23, 11).ylut(0xff);
+              at40k.iob_right(8, true).enableOutput();
+              at40k.iob_right(11, true).enableOutput();
+            */
+            //for(int x=4;  x<=22; x++) swap(at40k.cell(x, 22), NW, NORTH);
+
+
+            // entry cell: just copy X->X Y->Y
+            //at40k.cell(4,23).b(false);
+            //at40k.cell(4,23).yo(false);
+            //at40k.cell(4,23).ylut(at40k.cell(4,23).xlut());
+            //at40k.cell(4,23).xo(false);
+            /*
+              at40k.cell(4,23).xlut(0x55);
+              at40k.cell(4,23).ylut(0x55);
+            */
+            /*
+              at40k.cell(4,23).xlut(0x71);
+              at40k.cell(4,23).ylut(0x44);
+              at40k.cell(4,23).c(YLUT);
+              at40k.cell(4,23).f(false);
+              at40k.cell(4,23).t(false, false, true);
+            */
+
+            //for(int x=6;  x<=23; x++) copy(at40k.cell(x, 23), NW, WEST);  // top row copies to the right
+            /*
+              copy(at40k.cell(5, 22), NW, NORTH);
+              for(int x=6;  x<=22; x++) copy(at40k.cell(x, 22), NW, WEST);  // second top row copies to the right
+              //for(int y=22; y>=10; y--) copy(at40k.cell(23, y), NW, NORTH); // right edge copies down
+              for(int y=21; y>=9;  y--) copy(at40k.cell(22, y), NW, NORTH); // second right edge copies down
+              copy(at40k.cell(23, 9), NW, WEST);                            // second output
+            */
+            /*
+              handshaker(at40k.cell(4,23));
+              at40k.cell(4,23).xi(NW);
+              at40k.cell(4,23).yi(SOUTH);
+
+              //handshaker(at40k.cell(5,23));
+              //at40k.cell(5,23).yi(NORTH);
+
+              at40k.cell(5,23).yi(NORTH);
+              at40k.cell(5,23).xlut(0x55);
+              at40k.cell(5,23).xi(SW);
+              at40k.cell(5,23).ylut(0x55);
+              at40k.cell(5,22).yi(NORTH);
+              at40k.cell(5,22).xlut(0x55);
+
+              bounce(at40k.cell(4,22));
+
+              // cell southeast of entry cell
+              at40k.cell(3,22).xi(NE);      // NW->xin
+              at40k.cell(3,22).ylut(0x33);  // xin->y
+              at40k.cell(3,22).yo(false);   // y->yout
+              copy(at40k.cell(3, 21), NW, NORTH);  // second top row copies to the right
+              copy(at40k.cell(4, 21), NW, EAST);  // second top row copies to the right
+              copy(at40k.cell(5, 21), NW, EAST);  // second top row copies to the right
+              copy(at40k.cell(6, 21), NW, EAST);  // second top row copies to the right
+              copy(at40k.cell(6, 22), NW, SOUTH);  // second top row copies to the right
+            */
+            /*
+              at40k.cell(05,22).xlut(0xff);
+              at40k.cell(05,22).ylut(0xff);
+              at40k.cell(05,22).c(XLUT);
+              at40k.cell(05,22).f(false);
+              at40k.cell(05,22).b(false);
+              at40k.cell(05,22).oe(NONE);
+              at40k.cell(05,22).v(L3, true);
+              at40k.cell(05,22).out(L3, true);
+            */
+            /*
+              at40k.cell(4,23).ylut(~0xCC);
+              at40k.cell(4,23).xlut(~0xAA);
+              at40k.cell(5,23).ylut(~0xAA);
+              at40k.cell(5,23).xlut(~0xAA);
+              for(int i=6; i<PIPELEN+2; i++) {
+              at40k.cell(i, 23).ylut(0xAA);
+              at40k.cell(i, 23).xlut(0xCC);
+              at40k.cell(i, 23).yi(WEST);
+              }
+            */
+
+            doitx(at40k, slipway);
+            Gui vis = new Gui(device, slipway);
+            Frame fr = new Frame();
+            fr.addKeyListener(vis);
+            fr.setLayout(new BorderLayout());
+            fr.add(vis, BorderLayout.CENTER);
+            fr.pack();
+            fr.setSize(900, 900);
+            vis.repaint();
+            fr.repaint();
+            fr.show();
+            synchronized(Demo.class) { Demo.class.wait(); }
+            /* LAST
+               System.out.println("doit");
+               if (mullers) doitx(at40k, device);
+               //System.out.println("counter");
+               //counter(at40k, device);
+
+               at40k.cell(21,15).yi(WEST);
+               at40k.cell(21,15).ylut(0xAA);
+
+               at40k.cell(22,15).yi(WEST);
+               at40k.cell(22,15).ylut(0xAA);
+            */
+
+            FpslicDevice.Cell root = at40k.cell(10,20);
+            
+            root.yo(root.north());
+            root.ylut(~LUT_SELF);
+            root.c(YLUT);
+            root = root.north();
+
+            root.yo(root.east());
+            root.ylut(~LUT_SELF);
+            root.c(YLUT);
+            root = root.east();
+
+            root.yo(root.south());
+            root.ylut(~LUT_SELF);
+            root.c(YLUT);
+            root = root.south();
+
+            root.yo(root.west());
+            root.c(YLUT);
+            root = root.west();
+
+            //////////////////////////////////////////////////////////////////////////////
+
+            at40k.cell(23,15).h(3, true);
+            at40k.cell(23,15).yi(L3);
+            at40k.cell(23,15).ylut(0xAA);
+            at40k.iob_right(15, true).enableOutput(WEST);
+
+
+            FpslicDevice.Cell c = at40k.cell(10,10);
+            c.ylut(~LUT_SELF);
+            c.xlut(LUT_Z);
+            c.yi(WEST);
+            c.c(YLUT);
+            c.f(false);
+            c.t(TMUX_FB);
+            copy(c.west(), EAST, NW);
+            copy(c.west().north().west(), SE, SE);
+
+            c = c.east();
+            c.ylut(~LUT_SELF);
+            c.xlut(LUT_Z);
+            c.yi(EAST);
+            c.c(YLUT);
+            c.f(false);
+            c.t(TMUX_FB);
+            copy(c.east(), WEST, SE);
+            copy(c.east().south().east(), NW, NW);
+
+            c = c.north();
+            copy(c.north(), SOUTH, SOUTH);
+            c.xlut((LUT_SELF & ~LUT_OTHER) | LUT_Z);
+            c.ylut(LUT_Z);
+            c.yi(SOUTH);
+            c.c(XLUT);
+            c.xi(SW);
+            c.wi(L4);
+            c.f(false);
+            c.t(TMUX_W_AND_FB);
+            c.v(L4, false);
+            c.h(L4, true);
+            c.v(L2, false);
+            c.h(L2, true);
+
+            c = c.west();
+            copy(c.north(), SOUTH, SOUTH);
+            c.xlut((LUT_SELF & ~LUT_OTHER) | LUT_Z);
+            c.ylut(~LUT_Z);
+            c.yi(SOUTH);
+            c.xi(SE);
+            c.c(XLUT);
+            c.wi(L4);
+            c.f(false);
+            c.t(TMUX_W_AND_FB);
+            c.v(L4, false);
+            c.h(L4, true);
+            c.v(L2, false);
+            c.h(L2, true);
+
+            c = c.west();
+            c.v(L4, false);
+            c.h(L4, true);
+            c.out(L4, true);
+            c.f(false);
+            c.b(false);
+            c.oe(NONE);
+            c.c(YLUT);
+            c.hwire(L4).west().drives(c.hwire(L4), false);
+            c.hwire(L4).east().drives(c.hwire(L4), false);
+
+            c = c.south();
+            c = c.south();
+            c.v(L4, false);
+            c.h(L4, true);
+            c.out(L4, true);
+            c.f(false);
+            c.b(false);
+            c.oe(NONE);
+            c.c(YLUT);
+            c.hwire(L4).west().drives(c.hwire(L4), false);
+            c.hwire(L4).east().drives(c.hwire(L4), false);
+
+            c = c.east();
+            c = c.east();
+            copy(c.south(), NORTH, NORTH);
+            c.xlut(((~LUT_SELF) & (~LUT_OTHER)) | LUT_Z);
+            c.ylut(LUT_Z);
+            c.yi(NORTH);
+            c.c(XLUT);
+            c.xi(NW);
+            c.wi(L4);
+            c.f(false);
+            c.t(TMUX_W_AND_FB);
+            c.v(L4, false);
+            c.h(L4, true);
+            c.v(L2, false);
+            c.h(L2, true);
+
+            c = c.west();
+            copy(c.south(), NORTH, NORTH);
+            c.xlut((LUT_SELF & LUT_OTHER) | LUT_Z);
+            c.ylut(LUT_Z);
+            c.yi(NORTH);
+            c.xi(NE);
+            c.c(XLUT);
+            c.wi(L4);
+            c.f(false);
+            c.t(TMUX_W_AND_FB);
+            c.v(L4, false);
+            c.h(L4, true);
+            c.v(L2, false);
+            c.h(L2, true);
+
+
+            // catch a rising transition
+            /*
+              c = c.west();
+              c.v(L2, false);
+              c.h(L2, true);
+              c.out(L2, true);
+              c.f(false);
+              c.b(false);
+              c.oe(NONE);
+              c.c(YLUT);
+            */
+            c.hwire(L2).west().drives(c.hwire(L2), false);
+            c.hwire(L2).east().drives(c.hwire(L2), false);
+
+
+
+            //////
+
+            c = at40k.cell(20,20);
+            c.yi(WEST);
+            c.ylut(LUT_SELF);
+            c.c(YLUT);
+            c.oe(H4);
+            c.h(L4, true);
+            c.b(false);
+            c.f(false);
+            c.out(L4);
+
+            c = at40k.cell(21,20);
+            c.c(YLUT);
+            c.oe(NONE);
+            c.h(L4, true);
+            c.b(false);
+            c.f(false);
+
+
+            c = at40k.cell(8,8);
+            c.f(true);
+            c.b(true);
+            c.xo(true);
+            c.xi(NE);
+            c.zi(L3);
+            c.wi(L0);
+            c.yi(NORTH);
+            c.oe(H4);
+            c.h(L0, true);
+            c.h(L2, true);
+            c.h(L4, true);
+            c.v(L1, true);
+            c.v(L3, true);
+            c.out(L0, true);
+            c.out(L1, true);
+            c.out(L2, true);
+            c.out(L3, true);
+            c.out(L4, true);
+            c.xo(true);
+            c.yo(true);
+            c.c(ZMUX);
+
+            at40k.cell(9,10).xo(true);
+            at40k.cell(9,10).yo(true);
+            at40k.cell(9,10).c(YLUT);
+            at40k.cell(9,10).b(false);
+
+            //for(int x=5; x<PIPELEN; x++) {
+            //at40k.cell(x,23).hwire(L0).drives(at40k.cell(x,23).hwire(L0).east());
+            //}
+
+            /*
+              at40k.cell(22,11).ylut(0xff);
+              at40k.cell(23,11).yi(L3);
+              //at40k.cell(23,11).yi(WEST);
+              //at40k.cell(23,11).xi(L1);
+              at40k.cell(23,11).ylut(0xAA);
+              at40k.iob_right(11, true).enableOutput(WEST);
+              at40k.cell(23,11).v(L3, true);
+              at40k.cell(23,11).yo(false);
+              //at40k.flush();
+              */
+            int vx=04;
+            int vv=23;
+            /*
+              System.out.println("correct: " + at40k.cell(19,15).hwire(L3) + " drives " + at40k.cell(20,15).hwire(L3));
+              System.out.println("correct: " + at40k.cell(15,15).hwire(L3) + " drives " + at40k.cell(19,15).hwire(L3));
+              System.out.println("correct: " + at40k.cell(11,15).hwire(L3) + " drives " + at40k.cell(15,15).hwire(L3));
+              System.out.println("correct: " + at40k.cell(07,15).hwire(L3) + " drives " + at40k.cell(11,15).hwire(L3));
+
+              at40k.cell(19,15).hwire(L3).drives(at40k.cell(20,15).hwire(L3), true);
+              at40k.cell(15,15).hwire(L3).drives(at40k.cell(19,15).hwire(L3), true);
+              at40k.cell(11,15).hwire(L3).drives(at40k.cell(15,15).hwire(L3), true);
+              at40k.cell(07,15).hwire(L3).drives(at40k.cell(11,15).hwire(L3), true);
+            */
+            //at40k.cell(05,vv).xlut(0xff);
+            //at40k.cell(05,vv).ylut(0xff);
+            /*
+              at40k.cell(vx,vv).c(YLUT);
+              at40k.cell(vx,vv).f(false);
+              at40k.cell(vx,vv).b(false);
+              at40k.cell(vx,vv).oe(NONE);
+              at40k.cell(vx,vv).v(L3, true);
+              at40k.cell(vx,vv).out(L3, true);
+            */
+            /*
+              at40k.cell(vx,15).v(L3, true);
+              at40k.cell(vx,15).h(L3, true);
+              at40k.cell(vx,19).vwire(L3).drives(at40k.cell(vx,15).vwire(L3), true);
+              at40k.cell(vx,23).vwire(L3).drives(at40k.cell(vx,19).vwire(L3), true);
+            */
+
+            //at40k.cell(5,23).ylut(0x00);
+            //at40k.cell(6,22).ylut(0xff);
+            //at40k.cell(22,11).ylut(0xff);
+            /*
+              FpslicDevice.Cell cell = at40k.cell(4, 16);
+              cell.xlut(0xff);
+              cell.ylut(0xff);
+              cell.b(false);
+              cell.f(false);
+              cell.c(XLUT);
+              cell.h(L3, true);
+              cell.v(L3, true);
+              cell.out(L3, true);
+              cell.oe(NONE);
+            */
+            //scan(at40k, cell, YLUT, true);
+            //scan(at40k, cell, YLUT, false);
+
+            //device.scanFPGA(true);
+
+            at40k.cell(10,10).f(true);
+            at40k.cell(10,10).c(ZMUX);
+
+            at40k.cell(8,7).xlut(LUT_SELF);
+            at40k.cell(8,7).xi(NW);
+
+            at40k.cell(7,8).xlut(LUT_SELF & LUT_Z);
+            at40k.cell(7,8).xi(SE);
+            at40k.cell(7,8).c(XLUT);
+            at40k.cell(7,8).f(false);
+            at40k.cell(7,8).b(false);
+            at40k.cell(7,8).t(TMUX_FB);
+            at40k.cell(7,8).xo(false);
+            System.out.println(at40k.cell(7,8).fb_relevant());
+
+            at40k.cell(6,13).xi(SE);
+            at40k.cell(6,13).c(ZMUX);
+            at40k.cell(6,13).xlut(LUT_SELF);
+            at40k.cell(6,13).ylut(LUT_OTHER);
+            at40k.cell(6,13).xo(false);
+            at40k.cell(6,13).yo(false);
+            at40k.cell(7,12).xi(SE);
+
+            for(int i=0; i<24; i++) {
+                at40k.iob_bot(i, true).enableOutput(NORTH);
+                at40k.iob_bot(i, false).enableOutput(NW);
+                at40k.cell(i, 0).xlut(0xff);
+                at40k.cell(i, 0).ylut(0xff);
+            }
+
+            device.flush();
+
+            fr.addKeyListener(vis);
+            fr.setLayout(new BorderLayout());
+            fr.add(vis, BorderLayout.CENTER);
+            fr.pack();
+            fr.setSize(900, 900);
+            vis.repaint();
+            fr.repaint();
+            fr.show();
+            synchronized(Demo.class) { Demo.class.wait(); }
+
+
+
+            /*
+              Visualizer v = new Visualizer(at40k, device);
+              v.show();
+              v.setSize(1380, 1080);
+              FpslicDevice.Cell cell = at40k.cell(4, 23);
+            */
+            //Image img = v.createImage(v.getWidth(), v.getHeight());
+            /*
+              int x = 1;
+              int y = 14;
+              cell = at40k.cell(x,y);
+              scan(at40k, cell, YLUT, true);
+              cell.c(YLUT);
+              cell.b(false);
+              cell.f(false);
+              cell.oe(NONE);
+              cell.ylut(0xff);
+            */
+            //int x = 5;
+            //int y = 11;
+
+            //selfTest(device, at40k, v);
+            //System.out.println("save: " + SlipwayBoard.save + " of " + (SlipwayBoard.saveof*5));
+
+            at40k.iob_top(0, true).enableInput();
+            copy(at40k.cell(0, 23), NORTH, NORTH);
+            at40k.iob_bot(0, true).enableOutput(NORTH);
+
+            for(int i=0; i<10000; i++) {
+                //v.refresh();
+                try { Thread.sleep(100); } catch (Exception e) { }
+            }
+            //cell.ylut(0x09);
+
+            //at40k.cell(0x01, 0x17).h(0, false);
+            //at40k.cell(0x01, 0x17).xi(NE);
+            //at40k.cell(0x01, 0x17).ylut((byte)0x55);
+
+            //at40k.cell(0x04, 0x17).xlut((byte)0x10);
+            //at40k.cell(0x04, 0x17).ylut((byte)0x10);
+            //at40k.cell(0x04, 0x17).yo(false);
+            //at40k.cell(0x04, 0x17).xo();
+
+            /*
+              at40k.cell(0x01, 0x17).xi(L0);
+              at40k.cell(0x01, 0x17).h(L0, true);
+            */
+            /*
+              at40k.cell(0x03, 0x17).xlut((byte)0x55);
+              at40k.cell(0x03, 0x17).ylut((byte)0x55);
+              at40k.cell(0x03, 0x17).yi(EAST);
+              at40k.cell(0x03, 0x17).ylut((byte)0x55);
+              at40k.cell(0x03, 0x17).yo(true);
+
+              at40k.cell(0x03, 0x17).f(false);
+              at40k.cell(0x03, 0x17).c(XLUT);
+              at40k.cell(0x03, 0x17).oe(NONE);
+              at40k.cell(0x03, 0x17).out(L0, true);
+
+              at40k.cell(0x02, 0x17).yi(EAST);
+              at40k.cell(0x02, 0x17).ylut((byte)0x55);
+              at40k.cell(0x02, 0x17).yo(false);
+
+              at40k.cell(0x01, 0x17).yi(EAST);
+              at40k.cell(0x01, 0x17).ylut((byte)0x55);
+              at40k.cell(0x01, 0x17).yo(false);
+
+              at40k.cell(0x01, 0x17).h(L0, true);
+              at40k.cell(0x01, 0x17).v(L0, false);
+            */
+            //at40k.cell(0x01, 0x17).yi(L0);
+            //at40k.cell(0x01, 0x17).xi(L0);
+            //at40k.cell(0x01, 0x17).ylut((byte)0x33);
+
+            /*
+              at40k.cell(0x03, 0x17).h(L0, true);
+              at40k.cell(0x03, 0x17).out(L0, true);
+              at40k.cell(0x03, 0x17).c(XLUT);
+              at40k.cell(0x03, 0x17).f(false);
+            */
+            /*
+              at40k.cell(0x01, 0x17).xin(4);
+              at40k.cell(0x01, 0x17).yin(4);
+              at40k.cell(0x01, 0x16).ylut((byte)0x00);
+              device.mode4(2, 0x17, 0x01, 0);
+
+              for(int i=0; i<10; i++) {
+              Thread.sleep(3000);
+              System.out.println("tick");
+              //at40k.cell(0x01, 0x17).xlut((byte)0xFF);
+              at40k.cell(0x00, 0x17).ylut((byte)0x00);
+              device.getFpslicDevice().flush();
+              Thread.sleep(3000);
+              System.out.println("tick");
+              //at40k.cell(0x01, 0x17).xlut((byte)0x00);
+              at40k.cell(0x00, 0x17).ylut((byte)0xFF);
+              device.getFpslicDevice().flush();
+              }
+            */
+
+
+            /*
+              at40k.iob_top(0, true).output(0);
+              at40k.iob_top(0, true).oe(false);
+              at40k.iob_top(0, true).pullup();
+              device.getFpslicDevice().flush();
+              Thread.sleep(3000);
+
+              Log.info(Demo.class, "issuing command");
+              at40k.iob_top(1, true).pulldown();
+              device.getFpslicDevice().flush();
+            */
+            Log.info(Demo.class, "done");
+            System.exit(0);
+        } catch (Exception e) { e.printStackTrace(); }
+    }
+
+
+    public static void copy(FpslicDevice.Cell c, int xdir, int ydir) {
+        switch(xdir) {
+            case NW: case NE: case SW: case SE: {
+                c.xi(xdir);
+                c.xlut(LUT_SELF);
+                break;
+            }
+            case NORTH: case SOUTH: case EAST: case WEST: {
+                c.yi(xdir);
+                c.xlut(LUT_OTHER);
+                break;
+            }
+            case NONE: break;
+            default: throw new Error();
+        }
+        switch(ydir) {
+            case NW: case NE: case SW: case SE: {
+                c.xi(ydir);
+                c.ylut(LUT_OTHER);
+                break;
+            }
+            case NORTH: case SOUTH: case EAST: case WEST: {
+                c.yi(ydir);
+                c.ylut(LUT_SELF);
+                break;
+            }
+            case NONE: break;
+            default: throw new Error();
+        }
+        c.xo(false);
+        c.yo(false);
+    }
+    public static String hex(int x) {
+        return Long.toString(x & 0xffffffffL, 16);
+    }
+
+    public static void handshaker(FpslicDevice.Cell cell) {
+        cell.xlut(0x22);
+        cell.ylut(0x71);
+        cell.c(XLUT);
+        cell.f(false);
+        cell.t(false, false, true);
+    }
+
+
+    private static String pad(int i, String s) { if (s.length()>i) return s; return "0"+pad((i-1),s); }
+    public static String bin8(byte b) {
+        int n = b & 0xff;
+        String ret = "";
+        for(int i=7; i>=0; i--)
+            ret += (n & (1<<i))==0 ? "0" : "1";
+        return ret;
+    }
+
+    public static void bounce(FpslicDevice.Cell cell, int xi, int yi) {
+        cell.xlut((byte)0xCC);
+        cell.ylut((byte)0xCC);
+        cell.xi(xi);
+        cell.yi(yi);
+        cell.xo(false);
+        cell.yo(false);
+    }
+    public static void muller(FpslicDevice.Cell cell, int xi, int yi) {
+        cell.ylut(0xB2);
+        cell.c(YLUT);
+        cell.f(false);
+        cell.t(false, false, true);
+        cell.xi(xi);
+        cell.yi(yi);
+        cell.yo(false);
+        cell.xo(false);
+    }
+
+    public static int lutSwap(int x) {
+        return
+            (x & 0x80)        |
+            ((x & 0x20) << 1) |
+            ((x & 0x40) >> 1) |
+            (x & 0x10) |
+            (x & 0x08)        |
+            ((x & 0x02) << 1) |
+            ((x & 0x04) >> 1) |
+            (x & 0x01);
+    }
+
+    /** watches for a rising/falling edge on Yin, emits a pulse on Xout */
+    public static void pulse_detect(FpslicDevice.Cell c, int in, boolean falling) {
+        c.ylut(0x00);
+        c.xlut(0x00);
+        switch(in) {
+            case NW: case NE: case SW: case SE: {
+                c.xi(in);
+                loopback(c, XLUT);
+                if (!falling) c.ylut(lutSwap(0x0C)); /* x & !z */
+                else          c.ylut(lutSwap(0x30)); /* !x & z */
+                c.xlut(LUT_SELF);
+                break;
+            }
+            case NORTH: case SOUTH: case EAST: case WEST: {
+                c.yi(in);
+                loopback(c, YLUT);
+                if (!falling) c.xlut(0x0C); /* y & !z */
+                else          c.xlut(0x30); /* !y & z */
+                c.ylut(LUT_SELF);
+                break;
+            }
+            default: throw new Error();
+        }
+    }
+
+    /** watches for a pulse on Xin, copies value of Yin */
+    public static void pulse_copy(FpslicDevice.Cell cell, int xi, int yi, boolean invert) {
+        loopback(cell, YLUT);
+        if (!invert) cell.ylut(0xB8);   /* yo = x ?  yi : z => 1011 1000 */
+        else         cell.ylut(0x74);   /* yo = x ? !yi : z => 0111 0100 */
+        if (!invert) cell.xlut(lutSwap(0xB8));   /* yo = x ?  yi : z => 1011 1000 */
+        else         cell.xlut(lutSwap(0x74));   /* yo = x ? !yi : z => 0111 0100 */
+        cell.xi(xi);
+        cell.yi(yi);
+    }
+
+    public static void loopback(FpslicDevice.Cell cell, int cin) {
+        cell.f(false);
+        cell.b(false);
+        cell.t(false, false, true);
+        cell.yo(false);
+        cell.xo(false);
+        cell.c(cin);
+    }
+
+    public static void doit(FpslicDevice at40k, SlipwayBoard device) throws Exception {
+
+        FpslicDevice.Cell led = at40k.cell(1, 23);
+        led.v(L2, true);
+        led.h(L2, false);
+        led.yi(L2);
+        led.ylut(~LUT_SELF);
+        led.xlut(LUT_SELF);
+        led.yo(false);
+
+        FpslicDevice.Cell c = at40k.cell(1, 22);
+        c.out(L1, true);
+        c.out(L0, true);
+        c.oe(V4);
+        c.ylut(0xff);
+        c.h(L1, true);
+        c.h(L0, false);
+
+        c.v(L0, /*false*/true);
+
+        c.v(L1, true);
+        c.f(false);
+        c.b(false);
+        c.c(YLUT);
+
+        for(int i=0; i<4; i++) at40k.cell(i, 20).h(L0, false);
+        FpslicDevice.Cell z = at40k.cell(1, 20);
+        z.out(L0, true);
+        z.xlut(0xff);
+        z.c(XLUT);
+        z.yi(L0);
+        z.ylut(~LUT_SELF);
+        z.v(L0, true);
+        //z.h(L0, true);
+        z.h(L0, false);
+        z.f(false);
+        z.b(false);
+        z.hwire(L0).east().drives(z.hwire(L0), false);
+        z.hwire(L1).east().drives(z.hwire(L1), false);
+        z.vwire(L0).south().drives(z.vwire(L0), false);
+        z.vwire(L1).south().drives(z.vwire(L1), false);
+        z.oe(H4);
+
+        z = at40k.cell(0, 20);
+        z.oe(NONE);
+        z.out(L0, true);
+        z.out(L1, true);
+        z.out(L2, true);
+        //z.out(L3, true);
+        z.out(L4, true);
+        z.h(L0, true);
+        z.h(L1, true);
+        z.h(L2, true);
+        //z.h(L3, true);
+        z.h(L4, true);
+        z.f(false);
+        z.b(false);
+        z.yi(EAST);
+        z.ylut(LUT_SELF);
+        z.c(YLUT);
+
+        for(int y=20; y<=22; y++)
+            for(int x=2; x<=5; x++) {
+                c = at40k.cell(x, y);
+                copy(c, NW, WEST);
+            }
+
+        //c = at40k.cell(2, 22);
+        //c.h(L0, true);
+        //c.yi(L0);
+
+        c = at40k.cell(1, 21);
+        c.v(L0, true);
+        c.v(L2, true);
+        c.yi(L0);
+        c.out(L2, true);
+        c.ylut(LUT_SELF);
+        c.c(YLUT);
+        c.b(false);
+        c.f(false);
+        c.oe(NONE);
+        c.yo(false);
+
+        
+
+        c = at40k.cell(13, 22);
+        c.xlut(LUT_OTHER | 0xF0);
+        c.c(XLUT);
+        c.t(false, false, true);
+        c.b(false);
+        c.f(false);
+        c.ylut(0xF0);
+        c.yi(EAST);
+        c.yo(false);
+        /*
+        // this gate detects a rising edge on its Xin (delayed copy on Yin); when viewed, it inverts its state
+        c = at40k.cell(14, 22);
+        c.ylut(0x00);
+        c.c(XLUT);
+        c.f(false);
+        c.b(false);
+        c.t(false, false, true);
+        c.xi(SE);
+        c.yi(SOUTH);
+        c.yo(false);
+        c.xo(false);
+        c.ylut(0xA6); // (x & !z) ? ~y : y
+        c.xlut(LUT_SELF); 
+
+        c = at40k.cell(14, 20);
+        c.ylut(LUT_OTHER);
+        c.xi(NE);
+        c = at40k.cell(14, 21);
+        c.ylut(LUT_SELF);
+        c.xi(SOUTH);
+
+        c = at40k.cell(13, 22);
+        c.xlut(0x00);
+        c.xlut(LUT_OTHER);// | 0xF0);
+        */
+        //c = at40k.cell(13, 22);
+        //copy(c, NW, EAST);
+        /*
+          c.ylut(0x00);
+          c.c(YLUT);
+          c.f(false);
+          c.b(false);
+          c.t(false, false, true);
+          c.xi(SE);
+          c.yi(NORTH);
+          c.yo(false);
+          c.xo(false);
+          c.ylut(0x54);  // (x || z) & !y
+        */
+
+        /*        
+                  c = at40k.cell(2, 21);
+                  c.ylut(0x00);
+                  c.c(YLUT);
+                  c.f(false);
+                  c.b(false);
+                  c.t(false, false, true);
+                  c.xi(SE);
+                  c.yi(WEST);
+                  c.yo(false);
+                  c.xo(false);
+                  c.ylut(0xE8);
+ 
+                  //at40k.cell(2, 21).xlut(0xF0);
+
+                  at40k.cell(3, 22).ylut(LUT_OTHER);
+                  at40k.cell(3, 22).xi(SW);
+        */
+        //at40k.iob_top(5, true).enableOutput(SOUTH);
+        //at40k.iob_top(5, false).enableOutput(SE);
+    }
+
+    public static int yofs = mullers ? 19 : 22;
+    public static void counter(FpslicDevice at40k, SlipwayBoard device) throws Exception {
+        // watch for rising edge from south, emit pulse on Xout (to NE)
+        //copy(at40k.cell(16,23), SW, WEST);
+        
+        for(int x=22; x>=1; x-=2) {
+            pulse_detect(at40k.cell(x, yofs), SE,      false);
+            pulse_detect(at40k.cell(x, yofs-1), EAST,    true);
+            pulse_copy(at40k.cell(x-1, yofs), SE, SOUTH, false);
+            pulse_copy(at40k.cell(x-1, yofs-1), NE, NORTH, true);
+
+            //pulse_detect(at40k.cell(15, 22), NORTH, false);
+            //pulse_detect(at40k.cell(16, 22), NW,    true);
+            //pulse_copy(at40k.cell(16, 21), NW, WEST, false);
+            //pulse_copy(at40k.cell(15, 21), NE, EAST, true);
+        }
+        for(int x=23; x>1; x-=2) {
+            pulse_detect(at40k.cell(x-1, yofs-2), SW,    false);
+            pulse_detect(at40k.cell(x-1, yofs-3), WEST,  true);
+            pulse_copy(at40k.cell(x, yofs-2), SW, SOUTH, false);
+            pulse_copy(at40k.cell(x, yofs-3), NW, NORTH, true);
+
+            //pulse_detect(at40k.cell(15, 22), NORTH, false);
+            //pulse_detect(at40k.cell(16, 22), NW,    true);
+            //pulse_copy(at40k.cell(16, 21), NW, WEST, false);
+            //pulse_copy(at40k.cell(15, 21), NE, EAST, true);
+        }
+        copy(at40k.cell(1, yofs-2), SOUTH, SOUTH);
+        copy(at40k.cell(1, yofs-3), NORTH, NORTH);
+        at40k.cell(1, yofs-3).ylut(~at40k.cell(1, yofs-3).ylut());
+        at40k.cell(1, yofs-3).xlut(~at40k.cell(1, yofs-3).xlut());
+
+        copy(at40k.cell(23, yofs), SOUTH, SOUTH);
+        copy(at40k.cell(23, yofs-1), SOUTH, SOUTH);
+
+        for(int i=23; i>yofs; i--) copy(at40k.cell(1, i), SOUTH, SOUTH);
+
+        //at40k.iob_top(1, true).slew(SLOW);
+        //at40k.iob_top(1, false).slew(SLOW);
+
+    }
+
+    public static void fill(FpslicDevice at40k, SlipwayBoard device, int num) throws Exception {
+        //muller(at40k.cell(PIPELEN,22), NE, WEST);
+        FpslicDevice.Cell a = at40k.cell(10,22);
+        FpslicDevice.Cell b = at40k.cell(11,22);
+        a.ylut(0x00);
+        for(int i=0; i<num; i++) {
+            //System.out.println(i);
+            b.lut(0xff, 0xff);
+            device.getFpslicDevice().flush();
+            try { Thread.sleep(1); } catch (Exception e) { }
+            b.lut(0x00, 0x00);
+            device.getFpslicDevice().flush();
+            try { Thread.sleep(1); } catch (Exception e) { }
+        }
+        b.ylut(0xB2);
+        a.ylut(0xB2);
+    }
+
+    public static void drain(FpslicDevice at40k, SlipwayBoard device) throws Exception {
+        FpslicDevice.Cell a = at40k.cell(10,22);
+        FpslicDevice.Cell b = at40k.cell(11,22);
+        a.lut(0x00, 0x00);
+        b.lut(0x00, 0x00);
+        for(int i=0; i<30; i++) {
+            //System.out.println(i);
+            a.lut(0xff, 0xff);
+            device.getFpslicDevice().flush();
+            try { Thread.sleep(1); } catch (Exception e) { }
+            a.lut(0x00, 0x00);
+            device.getFpslicDevice().flush();
+            try { Thread.sleep(1); } catch (Exception e) { }
+        }
+        b.ylut(0xB2);
+        a.ylut(0xB2);
+    }
+
+    public static void doitx(FpslicDevice at40k, SlipwayBoard device) throws Exception {
+        for(int i=5; i<PIPELEN+1; i++) bounce(at40k.cell(i, 23), SE,                     SOUTH);
+        for(int x=5; x<PIPELEN;   x++) muller(at40k.cell(x, 22), x==PIPELEN-1 ? SE : NE, WEST);
+        
+        bounce(at40k.cell(PIPELEN,  21), NW, WEST);
+        
+        for(int x=5; x<PIPELEN;   x++) muller(at40k.cell(x, 21), SW,                     x==PIPELEN-1 ? NORTH : EAST);
+        for(int x=4; x<PIPELEN+1; x++) bounce(at40k.cell(x, 20), NW,                     NORTH);
+        
+        bounce(at40k.cell(4, 22), SE, EAST);
+        //muller(at40k.cell(4PIPELEN-1,21), SW, NORTH);
+        
+        //muller(at40k.cell(4,22), NE, WEST);
+        //at40k.cell(4,22).ylut(0xEE);
+        muller(at40k.cell(5, 22), NE, SOUTH);
+        muller(at40k.cell(5, 21), NW, EAST);
+        /*
+          for(int x=4; x>=0; x--) {
+          at40k.cell(x, 21).ylut(0xAA);
+          at40k.cell(x, 21).yi(EAST);
+          at40k.cell(x, 21).yo(false);
+          }
+
+          at40k.cell(0, 22).ylut(0xAA);
+          at40k.cell(0, 22).yi(SOUTH);
+          at40k.cell(0, 22).yo(false);
+
+          at40k.cell(0, 23).ylut(~0xAA);
+          at40k.cell(0, 23).xlut(~0xcc);
+          at40k.cell(0, 23).yi(SOUTH);
+          at40k.cell(0, 23).yo(false);
+        */
+        for(int x=3; x<=23; x+=2) {
+            pulse_detect(at40k.cell(x-1, 19), SW,    false);
+            pulse_detect(at40k.cell(x-1, 18), WEST,  true);
+            pulse_copy(at40k.cell(x, 19), SW, SOUTH, false);
+            pulse_copy(at40k.cell(x, 18), NW, NORTH, true);
+
+            if (x<17) {
+                pulse_detect(at40k.cell(x-1, 16), SW,    false);
+                pulse_detect(at40k.cell(x-1, 15), WEST,  true);
+                pulse_copy(at40k.cell(x, 16), SW, SOUTH, false);
+                pulse_copy(at40k.cell(x, 15), NW, NORTH, true);
+            }
+            //pulse_detect(at40k.cell(15, 22), NORTH, false);
+            //pulse_detect(at40k.cell(16, 22), NW,    true);
+            //pulse_copy(at40k.cell(16, 21), NW, WEST, false);
+            //pulse_copy(at40k.cell(15, 21), NE, EAST, true);
+        }
+        for(int x=14; x>=1; x--)
+            copy(at40k.cell(x, 17), EAST, EAST);
+        for(int x=4; x>=0; x--)
+            copy(at40k.cell(x, 21), EAST, EAST);
+        copy(at40k.cell(13, 17), SOUTH, SOUTH);
+
+        copy(at40k.cell(0, 20), NORTH, NORTH);
+        copy(at40k.cell(0, 19), NORTH, NORTH);
+        copy(at40k.cell(0, 18), NORTH, NORTH);
+        copy(at40k.cell(0, 17), NORTH, NORTH);
+        copy(at40k.cell(0, 16), NORTH, NORTH);
+        copy(at40k.cell(1, 16), WEST, WEST);
+        copy(at40k.cell(1, 15), NORTH, NORTH);
+
+        copy(at40k.cell(1, 20), SOUTH, SOUTH);
+        copy(at40k.cell(1, 19), SOUTH, SOUTH);
+        copy(at40k.cell(1, 18), SOUTH, SOUTH);
+
+        for(int y=20; y<=23; y++)
+            copy(at40k.cell(23, y), SOUTH, SOUTH);
+
+
+        //for(int x=19; x<=23; x++)
+        //copy(at40k.cell(x, 0), WEST, WEST);
+        //copy(at40k.cell(18, 19), NW, NW);
+        //at40k.iob_top(5, true).enableOutput(SOUTH);
+        //at40k.iob_top(5, false).enableOutput(SOUTH);
+    }
+}