diff --git a/c/classpath.h b/c/classpath.h
index 53009a4..25b8f66 100644
--- a/c/classpath.h
+++ b/c/classpath.h
@@ -1,6 +1,12 @@
 #include "example/DreamcastVideo2.class.h"
 #include "example/DreamcastVideo.class.h"
+#include "example/GdromExtentReader.class.h"
 #include "example/GdromTest.class.h"
+#include "filesystem/iso9660/ByteParser.class.h"
+#include "filesystem/iso9660/DirectoryRecord.class.h"
+#include "filesystem/iso9660/ExtentReader.class.h"
+#include "filesystem/iso9660/PrimaryVolumeDescriptor.class.h"
+#include "filesystem/iso9660/VolumeParser.class.h"
 #include "java/io/PrintStream.class.h"
 #include "java/lang/Boolean.class.h"
 #include "java/lang/Byte.class.h"
diff --git a/c/classpath.inc.c b/c/classpath.inc.c
index 900e62d..4a4a92f 100644
--- a/c/classpath.inc.c
+++ b/c/classpath.inc.c
@@ -1,6 +1,12 @@
 (const uint8_t *)&_binary_example_DreamcastVideo2_class_start,
 (const uint8_t *)&_binary_example_DreamcastVideo_class_start,
+(const uint8_t *)&_binary_example_GdromExtentReader_class_start,
 (const uint8_t *)&_binary_example_GdromTest_class_start,
+(const uint8_t *)&_binary_filesystem_iso9660_ByteParser_class_start,
+(const uint8_t *)&_binary_filesystem_iso9660_DirectoryRecord_class_start,
+(const uint8_t *)&_binary_filesystem_iso9660_ExtentReader_class_start,
+(const uint8_t *)&_binary_filesystem_iso9660_PrimaryVolumeDescriptor_class_start,
+(const uint8_t *)&_binary_filesystem_iso9660_VolumeParser_class_start,
 (const uint8_t *)&_binary_java_io_PrintStream_class_start,
 (const uint8_t *)&_binary_java_lang_Boolean_class_start,
 (const uint8_t *)&_binary_java_lang_Byte_class_start,
diff --git a/classpath.mk b/classpath.mk
index 8a148a4..cccec1f 100644
--- a/classpath.mk
+++ b/classpath.mk
@@ -1,7 +1,13 @@
 CLASS_PATH = \
 	example/DreamcastVideo2.class.o \
 	example/DreamcastVideo.class.o \
+	example/GdromExtentReader.class.o \
 	example/GdromTest.class.o \
+	filesystem/iso9660/ByteParser.class.o \
+	filesystem/iso9660/DirectoryRecord.class.o \
+	filesystem/iso9660/ExtentReader.class.o \
+	filesystem/iso9660/PrimaryVolumeDescriptor.class.o \
+	filesystem/iso9660/VolumeParser.class.o \
 	java/io/PrintStream.class.o \
 	java/lang/Boolean.class.o \
 	java/lang/Byte.class.o \
diff --git a/example/GdromExtentReader.class.h b/example/GdromExtentReader.class.h
new file mode 100644
index 0000000..4eb6791
--- /dev/null
+++ b/example/GdromExtentReader.class.h
@@ -0,0 +1,15 @@
+#pragma once
+
+#include <stdint.h>
+
+#ifdef __cplusplus
+extern C {
+#endif
+
+extern uint32_t _binary_example_GdromExtentReader_class_start __asm("_binary_example_GdromExtentReader_class_start");
+extern uint32_t _binary_example_GdromExtentReader_class_end __asm("_binary_example_GdromExtentReader_class_end");
+extern uint32_t _binary_example_GdromExtentReader_class_size __asm("_binary_example_GdromExtentReader_class_size");
+
+#ifdef __cplusplus
+}
+#endif
diff --git a/example/GdromTest.java b/example/GdromTest.java
index 44a72c1..ca909af 100644
--- a/example/GdromTest.java
+++ b/example/GdromTest.java
@@ -3,6 +3,17 @@ package example;
 import sega.dreamcast.gdrom.GdromProtocol;
 import sega.dreamcast.gdrom.G1IF;
 import java.misc.Memory;
+import filesystem.iso9660.VolumeParser;
+import filesystem.iso9660.ExtentReader;
+
+class GdromExtentReader implements ExtentReader {
+    public void readInto(byte[] buf, int extent) {
+        int starting_address = extent + 150;
+        System.out.print("starting_address: ");
+        System.out.println(starting_address);
+        GdromProtocol.cdReadPIO(buf, starting_address, 1);
+    }
+}
 
 class GdromTest {
     static byte[] buf;
@@ -29,15 +40,20 @@ class GdromTest {
 
         int data_track_fad = GdromProtocol.tocGetDataTrackFad();
 
-        int primary_volume_descriptor = data_track_fad + 16;
-
-        GdromProtocol.cdReadPIO(buf, primary_volume_descriptor, 1);
+        //GdromProtocol.cdReadPIO(buf, primary_volume_descriptor, 1);
 
+        GdromExtentReader reader = new GdromExtentReader();
+        VolumeParser parser = new VolumeParser(data_track_fad - 150, reader);
+        System.out.println("::parser parse::");
+        parser.parse();
+        /*
         System.out.println("data:");
         for (int i = 0; i < 16; i++) {
-            System.out.print(buf[i]);
-            System.out.print(' ');
+            System.out.print(((int)buf[i]) & 0xff);
+            System.out.print(" ");
         }
         System.out.println();
+        */
+
     }
 }
diff --git a/filesystem/iso9660/ByteParser.class.h b/filesystem/iso9660/ByteParser.class.h
new file mode 100644
index 0000000..f4a7acf
--- /dev/null
+++ b/filesystem/iso9660/ByteParser.class.h
@@ -0,0 +1,15 @@
+#pragma once
+
+#include <stdint.h>
+
+#ifdef __cplusplus
+extern C {
+#endif
+
+extern uint32_t _binary_filesystem_iso9660_ByteParser_class_start __asm("_binary_filesystem_iso9660_ByteParser_class_start");
+extern uint32_t _binary_filesystem_iso9660_ByteParser_class_end __asm("_binary_filesystem_iso9660_ByteParser_class_end");
+extern uint32_t _binary_filesystem_iso9660_ByteParser_class_size __asm("_binary_filesystem_iso9660_ByteParser_class_size");
+
+#ifdef __cplusplus
+}
+#endif
diff --git a/filesystem/iso9660/DirectoryRecord.class.h b/filesystem/iso9660/DirectoryRecord.class.h
new file mode 100644
index 0000000..48c637a
--- /dev/null
+++ b/filesystem/iso9660/DirectoryRecord.class.h
@@ -0,0 +1,15 @@
+#pragma once
+
+#include <stdint.h>
+
+#ifdef __cplusplus
+extern C {
+#endif
+
+extern uint32_t _binary_filesystem_iso9660_DirectoryRecord_class_start __asm("_binary_filesystem_iso9660_DirectoryRecord_class_start");
+extern uint32_t _binary_filesystem_iso9660_DirectoryRecord_class_end __asm("_binary_filesystem_iso9660_DirectoryRecord_class_end");
+extern uint32_t _binary_filesystem_iso9660_DirectoryRecord_class_size __asm("_binary_filesystem_iso9660_DirectoryRecord_class_size");
+
+#ifdef __cplusplus
+}
+#endif
diff --git a/filesystem/iso9660/ExtentReader.class.h b/filesystem/iso9660/ExtentReader.class.h
new file mode 100644
index 0000000..b2d6ffc
--- /dev/null
+++ b/filesystem/iso9660/ExtentReader.class.h
@@ -0,0 +1,15 @@
+#pragma once
+
+#include <stdint.h>
+
+#ifdef __cplusplus
+extern C {
+#endif
+
+extern uint32_t _binary_filesystem_iso9660_ExtentReader_class_start __asm("_binary_filesystem_iso9660_ExtentReader_class_start");
+extern uint32_t _binary_filesystem_iso9660_ExtentReader_class_end __asm("_binary_filesystem_iso9660_ExtentReader_class_end");
+extern uint32_t _binary_filesystem_iso9660_ExtentReader_class_size __asm("_binary_filesystem_iso9660_ExtentReader_class_size");
+
+#ifdef __cplusplus
+}
+#endif
diff --git a/filesystem/iso9660/ExtentReader.java b/filesystem/iso9660/ExtentReader.java
index e20190b..63bfdf9 100644
--- a/filesystem/iso9660/ExtentReader.java
+++ b/filesystem/iso9660/ExtentReader.java
@@ -1,5 +1,5 @@
 package filesystem.iso9660;
 
-interface ExtentReader {
+public interface ExtentReader {
     public abstract void readInto(byte[] buf, int extent);
 }
diff --git a/filesystem/iso9660/PrimaryVolumeDescriptor.class.h b/filesystem/iso9660/PrimaryVolumeDescriptor.class.h
new file mode 100644
index 0000000..e9d9e55
--- /dev/null
+++ b/filesystem/iso9660/PrimaryVolumeDescriptor.class.h
@@ -0,0 +1,15 @@
+#pragma once
+
+#include <stdint.h>
+
+#ifdef __cplusplus
+extern C {
+#endif
+
+extern uint32_t _binary_filesystem_iso9660_PrimaryVolumeDescriptor_class_start __asm("_binary_filesystem_iso9660_PrimaryVolumeDescriptor_class_start");
+extern uint32_t _binary_filesystem_iso9660_PrimaryVolumeDescriptor_class_end __asm("_binary_filesystem_iso9660_PrimaryVolumeDescriptor_class_end");
+extern uint32_t _binary_filesystem_iso9660_PrimaryVolumeDescriptor_class_size __asm("_binary_filesystem_iso9660_PrimaryVolumeDescriptor_class_size");
+
+#ifdef __cplusplus
+}
+#endif
diff --git a/filesystem/iso9660/TestExtentReader.java b/filesystem/iso9660/TestExtentReader.java
index 0850e1c..b9a83b6 100644
--- a/filesystem/iso9660/TestExtentReader.java
+++ b/filesystem/iso9660/TestExtentReader.java
@@ -6,7 +6,6 @@ import java.io.IOException;
 
 class TestExtentReader implements ExtentReader {
     byte[] all_bytes;
-
     public TestExtentReader() {
         try {
             all_bytes = Files.readAllBytes(Paths.get("classes/classes.iso"));
diff --git a/filesystem/iso9660/VolumeParser.class.h b/filesystem/iso9660/VolumeParser.class.h
new file mode 100644
index 0000000..f0e1358
--- /dev/null
+++ b/filesystem/iso9660/VolumeParser.class.h
@@ -0,0 +1,15 @@
+#pragma once
+
+#include <stdint.h>
+
+#ifdef __cplusplus
+extern C {
+#endif
+
+extern uint32_t _binary_filesystem_iso9660_VolumeParser_class_start __asm("_binary_filesystem_iso9660_VolumeParser_class_start");
+extern uint32_t _binary_filesystem_iso9660_VolumeParser_class_end __asm("_binary_filesystem_iso9660_VolumeParser_class_end");
+extern uint32_t _binary_filesystem_iso9660_VolumeParser_class_size __asm("_binary_filesystem_iso9660_VolumeParser_class_size");
+
+#ifdef __cplusplus
+}
+#endif
diff --git a/filesystem/iso9660/VolumeParser.java b/filesystem/iso9660/VolumeParser.java
index 33356d2..4aea3ea 100644
--- a/filesystem/iso9660/VolumeParser.java
+++ b/filesystem/iso9660/VolumeParser.java
@@ -2,9 +2,9 @@ package filesystem.iso9660;
 
 import filesystem.iso9660.PrimaryVolumeDescriptor;
 import filesystem.iso9660.DirectoryRecord;
-import filesystem.iso9660.TestExtentReader;
 
 public class VolumeParser {
+    int fad;
     byte[] buf;
     DirectoryRecord dr;
     ExtentReader reader;
@@ -102,8 +102,10 @@ public class VolumeParser {
     }
 
     public void parse() {
-        int pvd_extent = 16;
+        int pvd_extent = this.fad + 16;
 
+        System.out.print("pvd_extent: ");
+        System.out.println(pvd_extent);
         reader.readInto(buf, pvd_extent);
 
         printStandardIdentifier();
@@ -119,15 +121,20 @@ public class VolumeParser {
         walkDirectory(extent, num_extents, 0);
     }
 
-    public VolumeParser(ExtentReader reader) {
+    public VolumeParser(int fad, ExtentReader reader) {
+        this.fad = fad;
         this.reader = reader;
         this.buf = new byte[2048];
         this.dr = new DirectoryRecord(this.buf, 0);
     }
 
+    /*
+    import filesystem.iso9660.TestExtentReader;
+
     public static void main(String[] args) {
         TestExtentReader reader = new TestExtentReader();
         VolumeParser parser = new VolumeParser(reader);
         parser.parse();
     }
+    */
 }
diff --git a/generate_classpath.sh b/generate_classpath.sh
index 7e531a4..6972818 100644
--- a/generate_classpath.sh
+++ b/generate_classpath.sh
@@ -1,4 +1,4 @@
-function make_class () {
+function java_to_class () {
     while read line; do
         echo "${line%.java}.class"
     done
@@ -68,10 +68,20 @@ function classpath_h () {
 
 set -e
 
-find sega/ java/ -name '*.class' -exec rm -f {} \;
-make -j$(nproc) -f Makefile.dreamcast.mk $(find model/ example/ sega/ java/ -name '*.java' | make_class)
-find model/ example/ sega/ java/ -name '*.class' | sort | rename_class_files
-find model/ example/ sega/ java/ -name '*.class' | sort | classpath_mk
-find model/ example/ sega/ java/ -name '*.class' | sort | classpath_inc_c
-find model/ example/ sega/ java/ -name '*.class' | sort | make_header
-find model/ example/ sega/ java/ -name '*.class' | sort | classpath_h
+function find_classes () {
+    find model/ example/ sega/ java/ filesystem/ -name '*.class' -not -name 'Test*' | sort
+}
+
+function find_sources () {
+    find model/ example/ sega/ java/ filesystem/ -name '*.java' -not -name 'Test*' | sort
+}
+
+find sega/ java/ filesystem/ -name '*.class' -exec rm -f {} \;
+
+make -j$(nproc) -f Makefile.dreamcast.mk $(find_sources | java_to_class)
+
+find_classes | rename_class_files
+find_classes | classpath_mk
+find_classes | classpath_inc_c
+find_classes | make_header
+find_classes | classpath_h
diff --git a/java/io/PrintStream.java b/java/io/PrintStream.java
index ad867cb..4af2b96 100644
--- a/java/io/PrintStream.java
+++ b/java/io/PrintStream.java
@@ -24,6 +24,10 @@ public class PrintStream
         write(String.valueOf(b));
     }
 
+    public void print(char c) {
+        write(String.valueOf(c));
+    }
+
     public void print(int i) {
         write(String.valueOf(i));
     }
@@ -58,6 +62,11 @@ public class PrintStream
         write(newline);
     }
 
+    public void println(char c) {
+        write(String.valueOf(c));
+        write(newline);
+    }
+
     public void println(int i) {
         write(String.valueOf(i));
         write(newline);
diff --git a/java/lang/String.java b/java/lang/String.java
index 3bdcd2f..78f77f0 100644
--- a/java/lang/String.java
+++ b/java/lang/String.java
@@ -31,6 +31,10 @@ public class String {
         return b ? "true" : "false";
     }
 
+    public static String valueOf(char c) {
+        return new String(new byte[] { (byte)c });
+    }
+
     public static String valueOf(int i) {
         return Integer.toString(i);
     }
diff --git a/sega/dreamcast/gdrom/GdromProtocol.java b/sega/dreamcast/gdrom/GdromProtocol.java
index 80bdddb..176d39a 100644
--- a/sega/dreamcast/gdrom/GdromProtocol.java
+++ b/sega/dreamcast/gdrom/GdromProtocol.java
@@ -36,13 +36,13 @@ public class GdromProtocol {
 
         Memory.putU1(Gdrom.command, GdromBits.command__code__packet_command);
 
-        System.out.println("words:");
+        //System.out.println("words:");
         for (int i = 0; i < 6; i++) {
             int i0 = command.getByte(i * 2);
             int i1 = command.getByte(i * 2 + 1);
             // little endian
             int word = ((i1 & 0xff) << 8) | (i0 & 0xff);
-            System.out.println(word);
+            //System.out.println(word);
             Memory.putU2(Gdrom.data, word);
         }
 
@@ -56,18 +56,18 @@ public class GdromProtocol {
     public static void readData(byte[] buf, int length) {
         for (int i = 0; i < (length >> 1); i++) {
             int data = Memory.getU2(Gdrom.data);
-            buf[i * 2] = (byte)((data >> 8) & 0xff);
-            buf[i * 2 + 1] = (byte)(data & 0xff);
+            buf[i * 2] = (byte)(data);
+            buf[i * 2 + 1] = (byte)(data >> 8);
         }
     }
 
     public static int getFad(byte[] buf, int i) {
-        int i0 = buf[0];
-        int i1 = buf[1];
-        int i2 = buf[2];
-        //int i3 = low & 0xff;
+        //int i0 = ((int)buf[i * 4 + 0]) & 0xff;
+        int i1 = ((int)buf[i * 4 + 1]) & 0xff;
+        int i2 = ((int)buf[i * 4 + 2]) & 0xff;
+        int i3 = ((int)buf[i * 4 + 3]) & 0xff;
 
-        return (i2 << 16) | (i1 << 8) | i0;
+        return (i1 << 16) | (i2 << 8) | (i3 << 0);
     }
 
     public static int tocGetDataTrackFad() {