diff --git a/.classpath b/.classpath
index 380ae45fa..be02d8d67 100644
--- a/.classpath
+++ b/.classpath
@@ -3,7 +3,6 @@
 	<classpathentry excluding="processing/app/tools/format/|processing/app/tools/format/src/|processing/app/Trace.java|processing/app/RunnerClassLoader.java" kind="src" path="app/src"/>
 	<classpathentry kind="src" path="app/test"/>
 	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER"/>
-	<classpathentry combineaccessrules="false" kind="src" path="/processing-core"/>
 	<classpathentry kind="lib" path="app/lib/antlr.jar"/>
 	<classpathentry kind="lib" path="app/lib/apple.jar"/>
 	<classpathentry kind="lib" path="app/lib/ecj.jar"/>
@@ -21,5 +20,6 @@
 	<classpathentry kind="lib" path="app/lib/jmdns-3.4.1.jar"/>
 	<classpathentry kind="lib" path="app/lib/jsch-0.1.50.jar"/>
 	<classpathentry kind="lib" path="app/lib/jssc-2.8.0.jar"/>
+	<classpathentry combineaccessrules="false" kind="src" path="/arduino-core"/>
 	<classpathentry kind="output" path="app/bin"/>
 </classpath>
diff --git a/.gitignore b/.gitignore
index 3df768b55..6eb802a6c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,8 +1,8 @@
 app/bin/
 app/pde.jar
 build/macosx/work/
-core/bin/
-core/core.jar
+arduino-core/bin/
+arduino-core/arduino-core.jar
 hardware/arduino/bootloaders/caterina_LUFA/Descriptors.o
 hardware/arduino/bootloaders/caterina_LUFA/Descriptors.lst
 hardware/arduino/bootloaders/caterina_LUFA/Caterina.sym
diff --git a/app/build.xml b/app/build.xml
index 0fbcfeea2..31f52adf2 100644
--- a/app/build.xml
+++ b/app/build.xml
@@ -6,7 +6,7 @@
       <include name="*.jar"/>
     </fileset>
     <pathelement path="${env.JAVA_HOME}/lib/tools.jar"/>
-    <pathelement path="../core/core.jar"/>
+    <pathelement path="../arduino-core/arduino-core.jar"/>
   </path>
 
   <path id="class.path.test">
@@ -24,6 +24,11 @@
   </target>
 
   <target name="compile" description="Compile sources">
+    <condition property="core-built">
+      <available file="../arduino-core/arduino-core.jar" />
+    </condition>
+    <fail unless="core-built" message="Please build the Arduino-core library first and make sure it sits in ../arduino-core/arduino-core.jar" />
+
     <mkdir dir="bin" />
 
     <!-- ant seems to nuke ${java.home} for some reason, pointing at the JRE
@@ -75,9 +80,6 @@
 	   includeAntRuntime="false"
 	   debug="true"
 	   classpathref="class.path" />
-    <copy todir="bin" overwrite="true" verbose="true">
-      <fileset dir="src" includes="**/*.properties" />
-    </copy>
   </target>
 
   <target name="test" depends="compile" description="Runs the test">
diff --git a/arduino-core/build.xml b/arduino-core/build.xml
new file mode 100644
index 000000000..db709c3f8
--- /dev/null
+++ b/arduino-core/build.xml
@@ -0,0 +1,52 @@
+<?xml version="1.0"?>
+<project name="Arduino IDE Core" default="build">
+
+  <path id="class.path">
+    <fileset dir="lib">
+      <include name="*.jar"/>
+    </fileset>
+    <pathelement path="${env.JAVA_HOME}/lib/tools.jar"/>
+  </path>
+
+  <target name="clean" description="Clean out the build directories">
+    <delete dir="bin" />
+    <delete file="arduino-core.jar" />
+  </target>
+
+  <target name="compile" description="Compile">
+<!--
+    <taskdef name="methods"
+             classname="PAppletMethods"
+             classpath="methods/methods.jar" />
+    <methods dir="${basedir}/src/processing/core" />
+-->
+    <mkdir dir="bin" />
+
+    <!-- ant seems to nuke ${java.home} for some reason, pointing at the JRE
+	 subfolder instead of the actual JDK found at JAVA_HOME. 
+	 To avoid this, we grab the actual JAVA_HOME environment variable 
+	 and use that to specify the location of tools.jar. -->
+
+    <!-- if someone is better with ant please help clean this up -->
+    <property environment="env" />
+    <property name="java_home" value="${env.JAVA_HOME}" />
+
+    <javac source="1.6"
+           target="1.6"
+           encoding="UTF-8"
+           includeAntRuntime="false"
+           srcdir="src"
+           classpathref="class.path"
+           destdir="bin">
+    </javac>
+
+    <copy todir="bin" overwrite="true" verbose="true">
+      <fileset dir="src" includes="**/*.properties" />
+    </copy>
+  </target>
+
+  <target name="build" depends="compile" description="Build core library">
+    <jar basedir="bin" destfile="arduino-core.jar" />
+  </target>
+
+</project>
diff --git a/build/build.xml b/build/build.xml
index 1d646714a..229640ebe 100644
--- a/build/build.xml
+++ b/build/build.xml
@@ -39,6 +39,7 @@
 
   <!-- Libraries required for running arduino -->
   <fileset dir=".." id="runtime.jars">
+    <include name="arduino-core/arduino-core.jar" />
     <include name="app/pde.jar" />
     <include name="app/lib/commons-codec-1.7.jar" />
     <include name="app/lib/commons-exec-1.1.jar" />
@@ -83,10 +84,12 @@
   <!-- - - - - - - - - - - - - - - - - - -->
 
   <target name="subprojects-clean">
+    <subant buildpath="../arduino-core" target="clean"/>
     <subant buildpath="../app" target="clean"/>
   </target>
 
   <target name="subprojects-build">
+    <subant buildpath="../arduino-core" target="build"/>
     <subant buildpath="../app" target="build"/>
   </target>
 
@@ -160,7 +163,7 @@
     <echo message="Latest revision detected in shared/revision.txt is: ${revision}" />
 
     <!-- figure out the revision number in base.java -->
-    <loadfile srcfile="../app/src/processing/app/Base.java"
+    <loadfile srcfile="../arduino-core/src/processing/app/BaseNoGui.java"
 	      property="revision.base">
       <filterchain>
         <tokenfilter>
@@ -170,7 +173,7 @@
         </tokenfilter>
       </filterchain>
     </loadfile>
-    <echo message="Revision in Base.java is: ${revision.base}" />
+    <echo message="Revision in BaseNoGui.java is: ${revision.base}" />
   </target>
 
   <!-- - - - - - - - -->
diff --git a/build/macosx/template.app/Contents/Info.plist b/build/macosx/template.app/Contents/Info.plist
index fe985281f..726fd700f 100755
--- a/build/macosx/template.app/Contents/Info.plist
+++ b/build/macosx/template.app/Contents/Info.plist
@@ -94,7 +94,7 @@
       <!-- In 0149, removed /System/Library/Java from the CLASSPATH because
            it can cause problems if users have installed weird files there.
            http://dev.processing.org/bugs/show_bug.cgi?id=1045 -->
-      <string>$JAVAROOT/pde.jar:$JAVAROOT/antlr.jar:$JAVAROOT/apple.jar:$JAVAROOT/ecj.jar:$JAVAROOT/registry.jar:$JAVAROOT/quaqua.jar:$JAVAROOT/jssc-2.8.0.jar:$JAVAROOT/commons-codec-1.7.jar:$JAVAROOT/commons-exec-1.1.jar:$JAVAROOT/commons-httpclient-3.1.jar:$JAVAROOT/commons-logging-1.0.4.jar:$JAVAROOT/jmdns-3.4.1.jar:$JAVAROOT/jsch-0.1.50.jar:$JAVAROOT/jna.jar</string>
+      <string>$JAVAROOT/pde.jar:$JAVAROOT/arduino-core.jar:$JAVAROOT/antlr.jar:$JAVAROOT/apple.jar:$JAVAROOT/ecj.jar:$JAVAROOT/registry.jar:$JAVAROOT/quaqua.jar:$JAVAROOT/jssc-2.8.0.jar:$JAVAROOT/commons-codec-1.7.jar:$JAVAROOT/commons-exec-1.1.jar:$JAVAROOT/commons-httpclient-3.1.jar:$JAVAROOT/commons-logging-1.0.4.jar:$JAVAROOT/jmdns-3.4.1.jar:$JAVAROOT/jsch-0.1.50.jar:$JAVAROOT/jna.jar</string>
 
       <key>JVMArchs</key>  
       <array>