diff --git a/comm/iCE40/img/comm_ring_40mhz.PNG b/comm/iCE40/img/comm_ring_40mhz.png
similarity index 100%
rename from comm/iCE40/img/comm_ring_40mhz.PNG
rename to comm/iCE40/img/comm_ring_40mhz.png
diff --git a/comm/iCE40/notes.html b/comm/iCE40/notes.html
index f4fb09ad2080f2c46833f90c416b238ae46cc5fb..9a1dbed4751d78ffd7dbb6d6f184158299101454 100644
--- a/comm/iCE40/notes.html
+++ b/comm/iCE40/notes.html
@@ -36,8 +36,8 @@ Install instructions for all of the above tools can be found on the
 </center>
 
 <p>
-The default `make` target synthesizes the design and runs a timing analysis. The target `prog`
-programs an available iCEBreaker via USB.
+The default make target synthesizes the design and runs a timing analysis. The target prog programs
+an available iCEBreaker via USB.
 </p>
 
 
@@ -59,17 +59,17 @@ reports times 256.)
 </center>
 
 <p>
-The fastest I can clock the FPGA while passing `icetime`'s analysis is 39.75MHz. This lets us use a
+The fastest I can clock the FPGA while passing icetime's analysis is 39.75MHz. This lets us use a
 baud rate of nearly 5Mbit (we want to use 8x oversampling when receiving data since the two FPGAs
 clocks aren't synchronized). At this speed, we see groups of 256 round trips happening at a rate of
 978Hz. So overall this means the individual round trip frequency is 250kHz.
 </p>
 
-<img src="./img/comm_ring_40mhz.png" alt="oscilloscope measurements">
+<img src="/img/comm_ring_40mhz.png" alt="oscilloscope measurements">
 
 <p>
 Out of curiosity, I tried running at 48MHz as well and it seemed to work. At 60MHz however it
-quickly drops a byte. So here it seems prudent to stay within `icetime`'s limits.
+quickly drops a byte. So here it seems prudent to stay within icetime's limits.
 </p>
 
 </div>
diff --git a/index.html b/index.html
index 0cc1cbb90d223308437ba93458e1cde98793e844..846ab29c45f0a270b4afb1d359e23543c853bd5a 100644
--- a/index.html
+++ b/index.html
@@ -205,7 +205,7 @@ The communication test measures how quickly two nodes can exchange messages; thi
 
 <tr>
 <td>0.250</td>
-<td><a href=comm/iCE40/ring.v>iCE40, Verilog</a> (<a href=comm/iCE40/README.md>notes</a>)</td>
+<td><a href=comm/iCE40/ring.v>iCE40, Verilog</a> (<a href=comm/iCE40/notes.html>notes</a>)</td>
 <td>tx/rx jumpers (3.3V)</td>
 <td><a href=comm/iCE40/ring.v>iCE40, Verilog</a></td>
 <td>September 2021</td>