diff --git a/The-Mockingboard.md b/The-Mockingboard.md
index 780f4ba..7a7cad0 100644
--- a/The-Mockingboard.md
+++ b/The-Mockingboard.md
@@ -1,6 +1,7 @@
 The Mockingboards are a series of audio expansions for the Apple II, the most common of which provides stereo sound from a combination of two 6522s, connected to two AY-3-8910s.
 
-== AY-3-8910s ==
+## AY-3-8910s
+
 Each AY is connected to its 6522:
 * the 6522 port A connected to the AY's data pins;
 * bit 0 of the 6522's port B connected to the AY's BC1;
@@ -10,7 +11,8 @@ Each AY is connected to its 6522:
 
 The three channels from each AY are mixed together with equal volume.
 
-== 6522s ==
+## 6522s
+
 The 6522s are exposed to the processor's bus:
 * the four register select lines are connected to address lines 0 to 3; and
 * the reset and data lines connected as expected.
@@ -25,5 +27,6 @@ The 6522 for the right channel:
 
 Both also require the board's IOSEL to be active — they appear only in the ordinary IO area for their board.
 
-== Clock Rate ==
+## Clock Rate
+
 Both the 6522s and the AYs are clocked according to the Apple card's phase 1 clock input. So they are clocked at the same rate as the CPU.
\ No newline at end of file