diff --git a/devices/pdp11/machine/1170/test/machine.xml b/devices/pdp11/machine/1170/test/machine.xml
index b45d47b8e..2c599616a 100644
--- a/devices/pdp11/machine/1170/test/machine.xml
+++ b/devices/pdp11/machine/1170/test/machine.xml
@@ -8,5 +8,5 @@
 	<rom id="rom" addr="0xC000" size="0x0570" file="/devices/pdp11/rom/custom/bootcode.json"/>
 	<ram id="ram" addr="0x10000" size="0x34000"/>
 	<panel ref="/devices/pdp11/panel/1170/wide.xml"/>
-	<debugger id="debugger"/>
+	<debugger id="debugger" base="8"/>
 </machine>
diff --git a/modules/pdp11/lib/debugger.js b/modules/pdp11/lib/debugger.js
index a9cae962e..740d73e3b 100644
--- a/modules/pdp11/lib/debugger.js
+++ b/modules/pdp11/lib/debugger.js
@@ -69,10 +69,6 @@ var DbgAddrPDP11;
 /**
  * DebuggerPDP11(parmsDbg)
  *
- * @constructor
- * @extends Debugger
- * @param {Object} parmsDbg
- *
  * The DebuggerPDP11 component supports the following optional (parmsDbg) properties:
  *
  *      commands: string containing zero or more commands, separated by ';'
@@ -82,6 +78,10 @@ var DbgAddrPDP11;
  *
  * The DebuggerPDP11 component is an optional component that implements a variety of user
  * commands for controlling the CPU, dumping and editing memory, etc.
+ *
+ * @constructor
+ * @extends Debugger
+ * @param {Object} parmsDbg
  */
 function DebuggerPDP11(parmsDbg)
 {
@@ -1921,15 +1921,15 @@ if (DEBUGGER) {
         }
 
         var sOpcodes = "";
-        var sLine = this.toStrAddr(dbgAddrOp) + ": ";
+        var sLine = this.toStrAddr(dbgAddrOp) + ":";
         if (dbgAddrOp.addr !== PDP11.ADDR_INVALID && dbgAddr.addr !== PDP11.ADDR_INVALID) {
             do {
-                sOpcodes += this.toStrBase(this.getWord(dbgAddrOp, true));
+                sOpcodes += ' ' + this.toStrBase(this.getWord(dbgAddrOp, true));
                 if (dbgAddrOp.addr == null) break;
             } while (dbgAddrOp.addr != dbgAddr.addr);
         }
 
-        sLine += str.pad(sOpcodes, 10);
+        sLine += str.pad(sOpcodes, 15);
         sLine += str.pad(sOpName, 7);
         if (sOperands) sLine += ' ' + sOperands;
 
diff --git a/modules/shared/lib/debugger.js b/modules/shared/lib/debugger.js
index 0916eb4fa..d1ac13440 100644
--- a/modules/shared/lib/debugger.js
+++ b/modules/shared/lib/debugger.js
@@ -60,13 +60,17 @@ var DbgAddr;
 /**
  * Debugger(parmsDbg)
  *
- * @constructor
- * @extends Component
- * @param {Object} parmsDbg
+ * The Debugger component supports the following optional (parmsDbg) properties:
+ *
+ *      base: the base to use for most numeric input/output (default is 16)
  *
  * The Debugger component is a shared component containing a subset of functionality used by
  * the other CPU-specific Debuggers (eg, DebuggerX86).  Over time, the goal is to factor out as
  * much common debugging support as possible from those components into this one.
+ *
+ * @constructor
+ * @extends Component
+ * @param {Object} parmsDbg
  */
 function Debugger(parmsDbg)
 {
@@ -77,7 +81,7 @@ function Debugger(parmsDbg)
         /*
          * Default base used to display all values; modified with the "s base" command.
          */
-        this.nBase = 16;
+        this.nBase = parmsDbg['base'] || 16;
 
         /*
          * These keep track of instruction activity, but only when tracing or when Debugger checks
diff --git a/modules/shared/templates/components.xsl b/modules/shared/templates/components.xsl
index 7f3afa7da..18776e6cb 100644
--- a/modules/shared/templates/components.xsl
+++ b/modules/shared/templates/components.xsl
@@ -1168,6 +1168,12 @@
 
 	<xsl:template match="debugger[not(@ref)]">
 		<xsl:param name="machine" select="''"/>
+		<xsl:variable name="base">
+			<xsl:choose>
+				<xsl:when test="@base"><xsl:value-of select="@base"/></xsl:when>
+				<xsl:otherwise>16</xsl:otherwise>
+			</xsl:choose>
+		</xsl:variable>
 		<xsl:variable name="commands">
 			<xsl:choose>
 				<xsl:when test="@commands"><xsl:value-of select="@commands"/></xsl:when>
@@ -1183,7 +1189,7 @@
 		<xsl:call-template name="component">
 			<xsl:with-param name="machine" select="$machine"/>
 			<xsl:with-param name="class">debugger</xsl:with-param>
-			<xsl:with-param name="parms">,commands:'<xsl:value-of select="$commands"/>',messages:'<xsl:value-of select="$messages"/>'</xsl:with-param>
+			<xsl:with-param name="parms">,base:<xsl:value-of select="$base"/>,commands:'<xsl:value-of select="$commands"/>',messages:'<xsl:value-of select="$messages"/>'</xsl:with-param>
 		</xsl:call-template>
 	</xsl:template>