--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/pirelli/serial	Sun Oct 20 04:49:28 2013 +0000
@@ -0,0 +1,11 @@
+Tracing the apparently-unused MODEM UART signals
+
+TxD from Calypso: ball B9, L1 trace goes to (3905,1100).  Found it on L2, goes
+to an inner via at (3914,1070).  Found the inner via on L7, goes to (3182,1071).
+On L8 the signal goes directly to the debug connector identified by steve-m.
+
+RxD to Calypso: ball A9, seems to have a micro-via under the ball, pad coords
+(3888,1054).  Found it on L2, goes to an inner via at (3911,1030) and also to
+what looks like a via back to L1 at (3858,1228).  The stub back to L1 appears
+to be a pull-up resistor.  Found the inner via on L7, goes to (3154,928).
+On L8 the signal goes directly to the debug connector identified by steve-m.