1 files changed, 48 insertions, 1 deletions

diff --git a/tcl/init.tcl b/tcl/init.tcl
index 3b4e2ed..ea3f64c 100644
--- a/tcl/init.tcl
+++ b/tcl/init.tcl
@@ -64,12 +64,59 @@ iopin gpioc[38]     P2
 iopin gpioc[39]     P1
 iopin gpioc[40]     R1
 
+# Arduino shield pins: (seen from top)
+#
+# https://upload.wikimedia.org/wikipedia/commons/c/c9/Pinout_of_ARDUINO_Board_and_ATMega328PU.svg
+#
+#                SCL
+#                SDA
+#               AREF
+#                GND
+# NC              13
+# IOREF           12
+# RESET           11
+# 3.3V            10
+# 5V               9
+# GND              8
+# GND
+# VIN              7
+#                  6
+# A0               5
+# A1               4
+# A2               3
+# A3               2
+# A4               1(RX)
+# A5               0(TX)
+#
+# Equivalent FPGA pins:
+#
+#               N2 or D8 (?)
+#               N1 or C8 (?)
+#               -
+#               GND
+# -             L1
+# -             L2
+# L3            K1
+# 3.3V          L4
+# 5V            K5
+# GND           K2
+# GND
+# -             J1
+#               J2
+# -             G1
+# -             G2
+# -             D1
+# -             F3
+# -             C2
+# -             B1
+
 pin rs232_rx    B1
 pin rs232_tx    C2
 pin rs232_rts   F3
 pin rs232_cts   D1
 
-pin clock_out   L1
+pin debug_rx    K2
+pin debug_tx    K5
 
 rampin ram_data[0]  T12
 rampin ram_data[1]  T13