1 files changed, 8 insertions, 0 deletions
diff --git a/fpga/gpmc/xilinx/common/main.v b/fpga/gpmc/xilinx/common/main.v
index a59c3ed..cd811fa 100644
--- a/fpga/gpmc/xilinx/common/main.v
+++ b/fpga/gpmc/xilinx/common/main.v
@@ -42,6 +42,11 @@ module main(
 	output reg userlogic_reset,
 	input userlogic_clock,
 
+	output userlogic_serial_txd,
+	input userlogic_serial_rxd,
+	output host_serial_txd,
+	input host_serial_rxd,
+
 	input [3:0] four_bit_leds,
 	input [7:0] eight_bit_leds,
 
@@ -57,6 +62,9 @@ module main(
 
 	parameter RAM_ADDR_BITS = 15;
 
+	assign host_serial_txd = userlogic_serial_rxd;
+	assign userlogic_serial_txd = host_serial_rxd;
+
 	reg [15:0] sixteen_bit_io_in;
 	reg [15:0] sixteen_bit_io_out;
 	reg [15:0] sixteen_bit_io_reg;