diff --git a/chip-6800/support.js b/chip-6800/support.js
index b1f860a..28f06cb 100644
--- a/chip-6800/support.js
+++ b/chip-6800/support.js
@@ -4,7 +4,9 @@
 
 chipname='6800';
 
-grChipSize=7000;
+grChipSize=6600;
+grChipOffsetX=25
+grChipOffsetY=-200;
 
 ngnd = nodenames['gnd'];
 npwr = nodenames['vcc'];
diff --git a/chip-z80/support.js b/chip-z80/support.js
index 8097efd..ab81183 100644
--- a/chip-z80/support.js
+++ b/chip-z80/support.js
@@ -5,6 +5,8 @@
 chipname='z80';
 
 grChipSize=5000;
+grChipOffsetX=150;
+grChipOffsetY=0;
 grCanvasSize=5000;
 grMaxZoom=24;
 
@@ -22,15 +24,6 @@ presetLogLists=[
     ['_int','_nmi', nodenamereset],
 ];
 
-// Override drawSeg so we can use a different offset
-function drawSeg(ctx, seg){
-	var dx = 150;
-	ctx.beginPath();
-	ctx.moveTo(grScale(seg[0]+dx), grScale(grChipSize-seg[1]));
-	for(var i=2;i<seg.length;i+=2) ctx.lineTo(grScale(seg[i]+dx), grScale(grChipSize-seg[i+1]));
-	ctx.lineTo(grScale(seg[0]+dx), grScale(grChipSize-seg[1]));
-}
-
 function setupTransistors(){
     for(i in transdefs){
         var tdef = transdefs[i];
diff --git a/expertWires.js b/expertWires.js
index 9a0e13e..690411a 100644
--- a/expertWires.js
+++ b/expertWires.js
@@ -43,6 +43,8 @@ var labelThese=[];
 //   rounding artifacts, and at high zoom there will be anti-aliasing on edges.
 var grMaxZoom=12;
 var grChipSize=10000;
+var grChipOffsetX=400;
+var grChipOffsetY=0;
 var grCanvasSize=2000;
 var grLineWidth=1;
 
@@ -457,7 +459,7 @@ function hiliteNodeList(){
 // the localx and localy functions return canvas coordinate offsets from the canvas window top left corner
 // we divide the results by 'zoom' to get drawn coordinates useful in findNodeNumber
 // to convert to reported user chip coordinates we multiply by grChipSize/600
-// to compare to segdefs and transdefs coordinates we subtract 400 from x and subtract y from grChipSize
+// to compare to segdefs and transdefs coordinates we subtract grChipOffsetX from x and subtract y from grChipSize plus grChipOffsetY
 
 function handleClick(e){
 	var x = localx(hilite, e.clientX)/zoom;
@@ -476,8 +478,8 @@ function handleClick(e){
 	// we have a node, but maybe we clicked over a transistor
 	var nodelist=[w];
 	// match the coordinate against transistor gate bounding boxes
-	x=cx-400;
-	y=grChipSize-cy;
+	x=cx-grChipOffsetX;
+	y=grChipSize+grChipOffsetY-cy;
 	for(var i=0;i<nodes[w].gates.length;i++){
 		var xmin=nodes[w].gates[i].bb[0], xmax=nodes[w].gates[i].bb[1];
 		var ymin=nodes[w].gates[i].bb[2], ymax=nodes[w].gates[i].bb[3];
diff --git a/kioskWires.js b/kioskWires.js
index fb2e40f..f2c1659 100644
--- a/kioskWires.js
+++ b/kioskWires.js
@@ -45,6 +45,8 @@ var userResetHigh;
 //   rounding artifacts, and at high zoom there will be anti-aliasing on edges.
 var grMaxZoom=12;
 var grChipSize=10000;
+var grChipOffsetX=400;
+var grChipOffsetY=0;
 var grCanvasSize=2000;
 var grLineWidth=1;
 
diff --git a/wires.js b/wires.js
index f7145f2..ce0065b 100644
--- a/wires.js
+++ b/wires.js
@@ -211,11 +211,12 @@ function zoomToBox(xmin,xmax,ymin,ymax){
 }
 
 function drawSeg(ctx, seg){
-	var dx = 400;
+	var dx = grChipOffsetX;
+	var dy = grChipOffsetY;
 	ctx.beginPath();
-	ctx.moveTo(grScale(seg[0]+dx), grScale(grChipSize-seg[1]));
-	for(var i=2;i<seg.length;i+=2) ctx.lineTo(grScale(seg[i]+dx), grScale(grChipSize-seg[i+1]));
-	ctx.lineTo(grScale(seg[0]+dx), grScale(grChipSize-seg[1]));
+	ctx.moveTo(grScale(seg[0]+dx), grScale(grChipSize-seg[1]+dy));
+	for(var i=2;i<seg.length;i+=2) ctx.lineTo(grScale(seg[i]+dx), grScale(grChipSize-seg[i+1]+dy));
+	ctx.lineTo(grScale(seg[0]+dx), grScale(grChipSize-seg[1]+dy));
 }
 
 function findNodeNumber(x,y){