diff --git a/apps/pdp10/diags/klad/dakaa/README.md b/apps/pdp10/diags/klad/dakaa/README.md
index 83a2842b4..4e88c0dfe 100644
--- a/apps/pdp10/diags/klad/dakaa/README.md
+++ b/apps/pdp10/diags/klad/dakaa/README.md
@@ -7,7 +7,7 @@ machines:
     type: pdp10
     config: /devices/pdp10/machine/ka10/test/debugger/machine.xml
     debugger: true
-    commands: a 30724 /apps/pdp10/diags/klad/dakaa/MYDAKAA.MAC
+    commands: a 30724 MYDAKAA.MAC
 ---
 
 PDP-10 KA10 Basic Instruction Diagnostic #1
@@ -32,7 +32,7 @@ The Debugger's assemble ("a") command can be used to test the new built-in
 of the [MACRO-10](http://archive.pcjs.org/pubs/dec/pdp10/tops10/02_1973AsmRef_macro.pdf) assembly language.
 This command:
 
-	a 30724 /apps/pdp10/diags/klad/dakaa/MYDAKAA.MAC
+	a 30724 MYDAKAA.MAC
 
 will automatically read the [MYDAKAA.MAC](MYDAKAA.MAC.txt) source file (a slightly modified copy of [DAKAA.MAC](DAKAA.MAC.txt)),
 assemble it, and then load the binary output at the specified address.
diff --git a/apps/pdp10/diags/klad/dakad/README.md b/apps/pdp10/diags/klad/dakad/README.md
index e7e13caa6..425f1cd9d 100644
--- a/apps/pdp10/diags/klad/dakad/README.md
+++ b/apps/pdp10/diags/klad/dakad/README.md
@@ -7,7 +7,7 @@ machines:
     type: pdp10
     config: /devices/pdp10/machine/ka10/test/debugger/machine.xml
     debugger: true
-    commands: a 30724 /apps/pdp10/diags/klad/dakad/MYDAKAD.MAC
+    commands: a 30724 MYDAKAD.MAC
 ---
 
 PDP-10 KA10 Basic Instruction Diagnostic #4
@@ -32,7 +32,7 @@ The Debugger's assemble ("a") command can be used to test the new built-in
 of the [MACRO-10](http://archive.pcjs.org/pubs/dec/pdp10/tops10/02_1973AsmRef_macro.pdf) assembly language.
 This command:
 
-	a 30724 /apps/pdp10/diags/klad/dakad/MYDAKAD.MAC
+	a 30724 MYDAKAD.MAC
 
 will automatically read the [MYDAKAD.MAC](MYDAKAD.MAC.txt) source file (a slightly modified copy of [DAKAD.MAC](DAKAD.MAC.txt)),
 assemble it, and then load the binary output at the specified address.  Use the command `db 30724` to dump the first few words
diff --git a/apps/pdp10/tests/macro10/LITNEST.MAC.txt b/apps/pdp10/tests/macro10/NESTLIT.MAC.txt
similarity index 100%
rename from apps/pdp10/tests/macro10/LITNEST.MAC.txt
rename to apps/pdp10/tests/macro10/NESTLIT.MAC.txt
diff --git a/apps/pdp10/tests/macro10/README.md b/apps/pdp10/tests/macro10/README.md
index cd9e65d9e..0ec2df6cc 100644
--- a/apps/pdp10/tests/macro10/README.md
+++ b/apps/pdp10/tests/macro10/README.md
@@ -13,6 +13,8 @@ machines:
 PDPjs MACRO-10 Mini-Assembler Tests
 -----------------------------------
 
+### Nested Macro Test
+
 The PDP-10 machine below automatically loads and assembles [TEXT.MAC](TEXT.MAC.txt), one of the
 first tests of the built-in PDPjs MACRO-10 Mini-Assembler.
 
@@ -23,11 +25,11 @@ and pseudo-ops **IRPC**, **IFE**, **IFN**, and **EXP**.  It generates 4 words of
 
 {% include machine.html id="testka10" %}
 
-After the machine executes the following command:
+Assemble TEXT.MAC:
 
-	a 100 /apps/pdp10/tests/macro10/TEXT.MAC
+	a 100 TEXT.MAC
 
-the following results should appear:
+Verify the following results:
 
 	starting PCjs MACRO-10 Mini-Assembler...
 	loading TEXT.MAC
@@ -39,9 +41,27 @@ the following results should appear:
 	PC=000100 RA=00000000 EA=000000 C0=0 C1=0 OV=0 ND=0 PD=0 
 	000100: 014101 102103  UUO     2,102103(1)
 
-and if you dump the first 4 words with the command `db 100 l4`:
+Dump the 4 assembled words with the command `db 100 l4`:
 
 	000100: 014101 102103  003 004 011 004 041  ....!
 	000101: 104105 106107  021 004 051 014 043  ..).#
 	000102: 110111 112113  022 004 111 024 045  ..I.%
 	000103: 114000 000000  023 000 000 000 000  .....
+
+Source code from TEXT.MAC:
+ 
+{% highlight text %}
+{% include_relative TEXT.MAC.txt %}
+{% endhighlight %}
+
+### Nested Literal Test
+
+Assemble NESTLIT.MAC:
+
+    a 100 NESTLIT.MAC
+ 
+Source code from NESTLIT.MAC:
+
+{% highlight text %}
+{% include_relative NESTLIT.MAC.txt %}
+{% endhighlight %}
diff --git a/modules/pdp10/lib/debugger.js b/modules/pdp10/lib/debugger.js
index 9fe9155d6..57b1a7c67 100644
--- a/modules/pdp10/lib/debugger.js
+++ b/modules/pdp10/lib/debugger.js
@@ -2606,7 +2606,7 @@ class DebuggerPDP10 extends Debugger {
         }
 
         var sOptions = asArgs[0].substr(1);
-        var match = sOpcode.match(/^(['"]?)((\/|http:).*)\1$/);
+        var match = sOpcode.match(/^(['"]?)(.*\.mac)\1$/i);
         if (match) {
             var dbg = this;
             if (this.macro10) {
diff --git a/modules/pdp10/lib/macro10.js b/modules/pdp10/lib/macro10.js
index 1a1008001..e5796bb7c 100644
--- a/modules/pdp10/lib/macro10.js
+++ b/modules/pdp10/lib/macro10.js
@@ -288,7 +288,7 @@ class Macro10 {
         /*
          * We know that local resources ending with ".MAC" are actually stored with a ".txt" extension.
          */
-        if (sURL[0] == '/' && sURL.slice(-4) == ".MAC") sURL += ".txt";
+        if (sURL.slice(-4).toUpperCase() == ".MAC") sURL += ".txt";
 
         Web.getResource(sURL, null, true, function processMacro10(sFile, sResource, nErrorCode) {
             if (nErrorCode) {