Corrected the mess caused by introducing default_nettype none into the design
verification netlists.  Also cleaned up the broken power-on-reset signaling,
and added connections from the user space to the I/O pad direct-to-pad analog
signal pins.
diff --git a/verilog/rtl/ring_osc2x13.v b/verilog/rtl/ring_osc2x13.v
index 719da6e..324c2c7 100644
--- a/verilog/rtl/ring_osc2x13.v
+++ b/verilog/rtl/ring_osc2x13.v
@@ -9,7 +9,7 @@
     input [1:0] trim;
     output out;
 
-    wire d0, d1, d2;
+    wire d0, d1, d2, ts;
 
     sky130_fd_sc_hd__clkbuf_2 delaybuf0 (
 	.A(in),
@@ -232,3 +232,4 @@
 `endif // !FUNCTIONAL
 
 endmodule
+`default_nettype wire