diff --git a/configure.py b/configure.py
index 42c6fb23c..00954404f 100644
--- a/configure.py
+++ b/configure.py
@@ -669,7 +669,7 @@ config.libs = [
             Object(NonMatching, "JSystem/JAudio/JASSeqParser.cpp"),
             Object(NonMatching, "JSystem/JAudio/JASTrack.cpp"),
             Object(NonMatching, "JSystem/JAudio/JASTrackInterrupt.cpp"),
-            Object(NonMatching, "JSystem/JAudio/JASTrackPort.cpp"),
+            Object(Matching,    "JSystem/JAudio/JASTrackPort.cpp"),
             Object(NonMatching, "JSystem/JAudio/JASBank.cpp"),
             Object(NonMatching, "JSystem/JAudio/JASWaveBank.cpp"),
             Object(NonMatching, "JSystem/JAudio/JASBasicBank.cpp"),
diff --git a/include/JSystem/JAudio/JASTrackPort.h b/include/JSystem/JAudio/JASTrackPort.h
new file mode 100644
index 000000000..dfb990a14
--- /dev/null
+++ b/include/JSystem/JAudio/JASTrackPort.h
@@ -0,0 +1,21 @@
+#ifndef JASTRACKPORT_H
+#define JASTRACKPORT_H
+
+#include "dolphin/types.h"
+
+namespace JASystem {
+    class TTrackPort {
+    public:
+        void init();
+        u16 readImport(int);
+        u16 readExport(int);
+        void writeImport(int, u16);
+        void writeExport(int, u16);
+
+        /* 0x00 */ u8 field_0x0[16];
+        /* 0x10 */ u8 field_0x10[16];
+        /* 0x20 */ u16 field_0x20[16];
+    };
+}
+
+#endif /* JASTRACKPORT_H */
diff --git a/src/JSystem/JAudio/JASTrackPort.cpp b/src/JSystem/JAudio/JASTrackPort.cpp
index 38a7151c8..b55e5341f 100644
--- a/src/JSystem/JAudio/JASTrackPort.cpp
+++ b/src/JSystem/JAudio/JASTrackPort.cpp
@@ -3,31 +3,45 @@
 // Translation Unit: JASTrackPort.cpp
 //
 
-#include "JASTrackPort.h"
-#include "dolphin/types.h"
+#include "JSystem/JAudio/JASTrackPort.h"
+#include "JSystem/JUtility/JUTAssert.h"
+
+const u32 MAX_PORTS = 16;
 
 /* 802842A8-802842E8       .text init__Q28JASystem10TTrackPortFv */
 void JASystem::TTrackPort::init() {
     /* Nonmatching */
+    for (int i = 0; i < 16; i++) {
+        field_0x0[i] = 0;
+        field_0x10[i] = 0;
+        field_0x20[i] = 0;
+    }
 }
 
 /* 802842E8-8028437C       .text readImport__Q28JASystem10TTrackPortFi */
-void JASystem::TTrackPort::readImport(int) {
-    /* Nonmatching */
+u16 JASystem::TTrackPort::readImport(int port_num) {
+    JUT_ASSERT(31, port_num >= 0 && port_num < MAX_PORTS);
+    field_0x0[port_num] = 0;
+    return field_0x20[port_num];
 }
 
 /* 8028437C-80284414       .text readExport__Q28JASystem10TTrackPortFi */
-void JASystem::TTrackPort::readExport(int) {
-    /* Nonmatching */
+u16 JASystem::TTrackPort::readExport(int port_num) {
+    JUT_ASSERT(38, port_num >= 0 && port_num < MAX_PORTS);
+    field_0x10[port_num] = 0;
+    return field_0x20[port_num];
 }
 
 /* 80284414-802844AC       .text writeImport__Q28JASystem10TTrackPortFiUs */
-void JASystem::TTrackPort::writeImport(int, unsigned short) {
-    /* Nonmatching */
+void JASystem::TTrackPort::writeImport(int port_num, u16 value) {
+    JUT_ASSERT(45, port_num >= 0 && port_num < MAX_PORTS);
+    field_0x0[port_num] = 1;
+    field_0x20[port_num] = value;
 }
 
 /* 802844AC-80284548       .text writeExport__Q28JASystem10TTrackPortFiUs */
-void JASystem::TTrackPort::writeExport(int, unsigned short) {
-    /* Nonmatching */
+void JASystem::TTrackPort::writeExport(int port_num, u16 value) {
+    JUT_ASSERT(51, port_num >= 0 && port_num < MAX_PORTS);
+    field_0x10[port_num] = 1;
+    field_0x20[port_num] = value;
 }
-