Index: trunk/pcblib-param/connector
===================================================================
--- trunk/pcblib-param/connector	(revision 234)
+++ trunk/pcblib-param/connector	(revision 235)
@@ -14,6 +14,8 @@
 #@@param:ny number of pins in the Y direction (mandatory, no default)
 #@@param:spacing spacing between the pins (in mil, or in mm using the mm suffix; optional, default is 100 mil)
 #@@param:silkmark how to mark pin 1; values: square, external, angled, none (optional; default is square)
+#@@param:eshift shift even rows or columns by half spacing; values: x (shift columns), y (shift rows) (optional; default: don't shift)
+#@@param:etrunc truncate the last pin of a shifted row or column (optional boolean, defaults to false)
 
 awk -f `dirname $0`/common.awk -f `dirname $0`/connector.awk -v "args=$*"
 
Index: trunk/pcblib-param/connector.awk
===================================================================
--- trunk/pcblib-param/connector.awk	(revision 234)
+++ trunk/pcblib-param/connector.awk	(revision 235)
@@ -2,7 +2,7 @@
 	P["spacing"] = 100
 	P["silkmark"] = "square"
 
-	proc_args(P, "nx,ny,spacing,silkmark", "nx,ny")
+	proc_args(P, "nx,ny,spacing,silkmark,eshift,etrunc", "nx,ny")
 
 	step=P["spacing"]
 
@@ -19,17 +19,46 @@
 	if (pin_drill > pin_ringdia*0.9)
 		pin_drill = pin_ringdia*0.9
 
-
 	half=step/2
 
+	eshift=tolower(P["eshift"])
+	etrunc=tolower(P["etrunc"])
+	if ((eshift != "x") && (eshift != "y") && (eshift != ""))
+		error("eshift must be x or y (got: ", eshift ")");
+
 	element_begin(spacing " mil connector", "CONN1", P["nx"] "*" P["ny"]    ,0,0, 0, -step)
 
-	for(x = 0; x < P["nx"]; x++)
-		for(y = 0; y < P["ny"]; y++)
-			element_pin(x * step, y * step)
+	for(x = 0; x < P["nx"]; x++) {
+		if ((eshift == "x") && ((x % 2) == 1))
+			yo = step/2
+		else
+			yo = 0
+		for(y = 0; y < P["ny"]; y++) {
+			if ((eshift == "y") && ((y % 2) == 1)) {
+				xo = step/2
+				if ((etrunc) && (x == P["nx"]-1))
+					continue
+			}
+			else {
+				xo = 0
+				if ((etrunc) && (y == P["ny"]-1) && (yo != 0))
+					continue
+			}
+			element_pin(x * step + xo, y * step + yo)
+		}
+	}
 
-	element_rectangle(-half, -half, P["nx"] * step-half, P["ny"] * step-half)
+	xo = 0
+	yo = 0
+	if (!etrunc) {
+		if (eshift == "y")
+			xo = step/2
+		if (eshift == "x")
+			yo = step/2
+	}
 
+	element_rectangle(-half, -half, P["nx"] * step - half + xo, P["ny"] * step - half + yo)
+
 	if (P["silkmark"] == "angled") {
 		element_line(0, -half,  -half, 0)
 	}