diff --git a/modules/pcjs/lib/x86modb.js b/modules/pcjs/lib/x86modb.js
index d099db152..459672e50 100644
--- a/modules/pcjs/lib/x86modb.js
+++ b/modules/pcjs/lib/x86modb.js
@@ -1,5 +1,5 @@
 /**
- * @fileoverview Implements PCjs 8086 mode-byte decoding.
+ * @fileoverview Implements PCjs 8086-80286 ModRegRM byte decoders.
  * @author <a href="mailto:Jeff@pcjs.org">Jeff Parsons</a>
  * @version 1.0
  * Created 2012-Sep-05
diff --git a/modules/pcjs/lib/x86modb16.js b/modules/pcjs/lib/x86modb16.js
index 8f1892d6a..a12dc1e8b 100644
--- a/modules/pcjs/lib/x86modb16.js
+++ b/modules/pcjs/lib/x86modb16.js
@@ -1,5 +1,5 @@
 /**
- * @fileoverview Implements PCjs 8086 mode-byte decoding.
+ * @fileoverview Implements PCjs 80386 ModRegRM byte decoders with 16-bit addressing.
  * @author <a href="mailto:Jeff@pcjs.org">Jeff Parsons</a>
  * @version 1.0
  * Created 2012-Sep-05
diff --git a/modules/pcjs/lib/x86modb32.js b/modules/pcjs/lib/x86modb32.js
index 543f873d9..7620f8d1f 100644
--- a/modules/pcjs/lib/x86modb32.js
+++ b/modules/pcjs/lib/x86modb32.js
@@ -1,5 +1,5 @@
 /**
- * @fileoverview Implements PCjs 80386 mode-byte decoding.
+ * @fileoverview Implements PCjs 80386 ModRegRM byte decoders with 32-bit addressing.
  * @author <a href="mailto:Jeff@pcjs.org">Jeff Parsons</a>
  * @version 1.0
  * Created 2015-Jan-20
diff --git a/modules/pcjs/lib/x86modsib.js b/modules/pcjs/lib/x86modsib.js
index 784bedbca..ed2da51a8 100644
--- a/modules/pcjs/lib/x86modsib.js
+++ b/modules/pcjs/lib/x86modsib.js
@@ -1,5 +1,5 @@
 /**
- * @fileoverview Implements PCjs 8086 mode-byte decoding.
+ * @fileoverview Implements PCjs 80386 Scale-Index-Base (SIB) decoders.
  * @author <a href="mailto:Jeff@pcjs.org">Jeff Parsons</a>
  * @version 1.0
  * Created 2015-Jan-20
diff --git a/modules/pcjs/lib/x86modw.js b/modules/pcjs/lib/x86modw.js
index 8314d5765..9a1ac29a2 100644
--- a/modules/pcjs/lib/x86modw.js
+++ b/modules/pcjs/lib/x86modw.js
@@ -1,5 +1,5 @@
 /**
- * @fileoverview Implements PCjs 8086 mode-byte decoding.
+ * @fileoverview Implements PCjs 8086-80286 ModRegRM word decoders.
  * @author <a href="mailto:Jeff@pcjs.org">Jeff Parsons</a>
  * @version 1.0
  * Created 2012-Sep-05
diff --git a/modules/pcjs/lib/x86modw16.js b/modules/pcjs/lib/x86modw16.js
index 9752afdde..75a8df4b1 100644
--- a/modules/pcjs/lib/x86modw16.js
+++ b/modules/pcjs/lib/x86modw16.js
@@ -1,5 +1,5 @@
 /**
- * @fileoverview Implements PCjs 8086 mode-byte decoding.
+ * @fileoverview Implements PCjs 80386 ModRegRM word decoders with 16-bit addressing.
  * @author <a href="mailto:Jeff@pcjs.org">Jeff Parsons</a>
  * @version 1.0
  * Created 2012-Sep-05
diff --git a/modules/pcjs/lib/x86modw32.js b/modules/pcjs/lib/x86modw32.js
index c3aee4f61..7b92ec6a0 100644
--- a/modules/pcjs/lib/x86modw32.js
+++ b/modules/pcjs/lib/x86modw32.js
@@ -1,5 +1,5 @@
 /**
- * @fileoverview Implements PCjs 8086 mode-byte decoding.
+ * @fileoverview Implements PCjs 80386 ModRegRM word decoders with 32-bit addressing.
  * @author <a href="mailto:Jeff@pcjs.org">Jeff Parsons</a>
  * @version 1.0
  * Created 2015-Jan-20