diff --git a/src/emucore/CartELF.cxx b/src/emucore/CartELF.cxx
index d3b533a97..131437046 100644
--- a/src/emucore/CartELF.cxx
+++ b/src/emucore/CartELF.cxx
@@ -289,7 +289,34 @@ bool CartridgeELF::save(Serializer& out) const
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 bool CartridgeELF::load(Serializer& in)
 {
-  return false;
+  try {
+    myConfigStrictMode = in.getBool();
+    myConfigMips = in.getInt();
+    myConfigSystemType = static_cast<SystemType>(in.getByte());
+
+    resetWithConfig();
+
+    myIsBusDriven = in.getBool();
+    myDriveBusValue = in.getByte();
+    myArmCyclesOffset = in.getLong();
+    myExecutionStage = static_cast<ExecutionStage>(in.getByte());
+    myInitFunctionIndex = in.getInt();
+    myConsoleTiming = static_cast<ConsoleTiming>(in.getByte());
+
+    in.getByteArray(myLastPeekResult.get(), 0x1000);
+
+    if (!myTransactionQueue.load(in)) return false;
+    if (!myCortexEmu.load(in)) return false;
+    if (!myVcsLib.load(in)) return false;
+
+    myCortexEmu.loadDirtyRegions(in);
+  }
+  catch(...) {
+    cerr << "ERROR: failed to load ELF\n";
+    return false;
+  }
+
+  return true;
 }
 
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
diff --git a/src/emucore/CortexM0.cxx b/src/emucore/CortexM0.cxx
index 930cfdc54..3dae40e63 100644
--- a/src/emucore/CortexM0.cxx
+++ b/src/emucore/CortexM0.cxx
@@ -559,19 +559,19 @@ CortexM0::CortexM0()
 }
 
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
-void CortexM0::MemoryRegion::serialize(Serializer& serializer) const
+void CortexM0::MemoryRegion::saveDirtyBits(Serializer& out) const
 {
   if (type != MemoryRegionType::directCode && type != MemoryRegionType::directData) return;
 
-  serializer.putBool(dirty);
+  out.putBool(dirty);
   if (!dirty) return;
 
-  serializer.putInt(accessWatermarkLow);
-  serializer.putInt(accessWatermarkHigh);
+  out.putInt(accessWatermarkLow);
+  out.putInt(accessWatermarkHigh);
 
   switch (type) {
     case MemoryRegionType::directCode:
-      serializer.putByteArray(
+      out.putByteArray(
         std::get<1>(access).backingStore + (accessWatermarkLow - base),
         accessWatermarkHigh - accessWatermarkLow + 1
       );
@@ -579,26 +579,62 @@ void CortexM0::MemoryRegion::serialize(Serializer& serializer) const
       break;
 
     case MemoryRegionType::directData:
-      serializer.putByteArray(
+      out.putByteArray(
         std::get<0>(access).backingStore + (accessWatermarkLow - base),
         accessWatermarkHigh - accessWatermarkLow + 1
       );
 
       break;
+
+    default:
+      break;
   }
 }
 
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
-bool CortexM0::save(Serializer& serializer) const
+void CortexM0::MemoryRegion::loadDirtyBits(Serializer& in)
+{
+  if (type != MemoryRegionType::directCode && type != MemoryRegionType::directData) return;
+
+  dirty = in.getBool();
+  if (!dirty) return;
+
+  accessWatermarkLow = in.getInt();
+  accessWatermarkHigh = in.getInt();
+
+  switch (type) {
+    case MemoryRegionType::directCode:
+      in.getByteArray(
+        std::get<1>(access).backingStore + (accessWatermarkLow - base),
+        accessWatermarkHigh - accessWatermarkLow + 1
+      );
+
+      break;
+
+    case MemoryRegionType::directData:
+      in.getByteArray(
+        std::get<0>(access).backingStore + (accessWatermarkLow - base),
+        accessWatermarkHigh - accessWatermarkLow + 1
+      );
+
+      break;
+
+    default:
+      break;
+  }
+}
+
+// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+bool CortexM0::save(Serializer& out) const
 {
   try {
     for (size_t i = 0; i < 16; i++)
-      serializer.putInt(reg_norm[i]);
+      out.putInt(reg_norm[i]);
 
-    serializer.putInt(znFlags);
-    serializer.putInt(cFlag);
-    serializer.putInt(vFlag);
-    serializer.putLong(myCycleCounter);
+    out.putInt(znFlags);
+    out.putInt(cFlag);
+    out.putInt(vFlag);
+    out.putLong(myCycleCounter);
   }
   catch (...) {
     cerr << "ERROR: failed to save cortex M0\n";
@@ -609,18 +645,42 @@ bool CortexM0::save(Serializer& serializer) const
 }
 
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
-bool CortexM0::load(Serializer& serializer)
+bool CortexM0::load(Serializer& in)
 {
-  return false;
+  try {
+    reset();
+
+    for (size_t i = 0; i < 16; i++)
+      reg_norm[i] = in.getInt();
+
+    znFlags = in.getInt();
+    cFlag = in.getInt();
+    vFlag = in.getInt();
+    myCycleCounter = in.getLong();
+  }
+  catch (...) {
+    cerr << "ERROR: failed to load cortex M0\n";
+    return false;
+  }
+
+  return true;
 }
 
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
-void CortexM0::saveDirtyRegions(Serializer& serializer) const
+void CortexM0::saveDirtyRegions(Serializer& out) const
 {
-for (size_t i = 0; i < myNextRegionIndex; i++)
-    myRegions[i].serialize(serializer);
+  for (size_t i = 0; i < myNextRegionIndex; i++)
+    myRegions[i].saveDirtyBits(out);
 }
 
+// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+void CortexM0::loadDirtyRegions(Serializer& in)
+{
+  for (size_t i = 0; i < myNextRegionIndex; i++)
+    myRegions[i].loadDirtyBits(in);
+
+  recompileCodeRegions();
+}
 
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 void CortexM0::MemoryRegion::reset()
diff --git a/src/emucore/CortexM0.hxx b/src/emucore/CortexM0.hxx
index 52e709b81..e65966499 100644
--- a/src/emucore/CortexM0.hxx
+++ b/src/emucore/CortexM0.hxx
@@ -119,9 +119,10 @@ class CortexM0: public Serializable
 
     CortexM0& mapDefault(BusTransactionDelegate* delegate);
 
-    bool save(Serializer& serializer) const override;
-    bool load(Serializer& serializer) override;
+    bool save(Serializer& out) const override;
+    bool load(Serializer& in) override;
     void saveDirtyRegions(Serializer& serialized) const;
+    void loadDirtyRegions(Serializer& serialized);
 
     CortexM0& reset();
     CortexM0& setPc(uInt32 pc);
@@ -184,7 +185,8 @@ class CortexM0: public Serializable
       > access;
 
       void reset();
-      void serialize(Serializer& serializer) const;
+      void saveDirtyBits(Serializer& out) const;
+      void loadDirtyBits(Serializer& in);
 
       private:
         MemoryRegion(const MemoryRegion&) = delete;
diff --git a/src/emucore/elf/BusTransactionQueue.cxx b/src/emucore/elf/BusTransactionQueue.cxx
index 7c0833421..95e2bf927 100644
--- a/src/emucore/elf/BusTransactionQueue.cxx
+++ b/src/emucore/elf/BusTransactionQueue.cxx
@@ -66,15 +66,15 @@ BusTransactionQueue& BusTransactionQueue::reset()
 }
 
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
-bool BusTransactionQueue::save(Serializer& serializer) const
+bool BusTransactionQueue::save(Serializer& out) const
 {
   try {
-    serializer.putInt(myQueueSize);
-    serializer.putShort(myNextInjectAddress);
-    serializer.putLong(myTimestamp);
+    out.putInt(myQueueSize);
+    out.putShort(myNextInjectAddress);
+    out.putLong(myTimestamp);
 
     for (size_t i = 0; i < myQueueSize; i++)
-      myQueue[(myQueueNext + i) % myQueueCapacity].serialize(serializer);
+      myQueue[(myQueueNext + i) % myQueueCapacity].serialize(out);
   }
   catch (...) {
     cerr << "ERROR: failed to save bus transaction queue\n";
@@ -85,19 +85,46 @@ bool BusTransactionQueue::save(Serializer& serializer) const
 }
 
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
-bool BusTransactionQueue::load(Serializer& serializer)
+bool BusTransactionQueue::load(Serializer& in)
 {
+  try {
+    reset();
+
+    myQueueSize = in.getInt();
+    myNextInjectAddress = in.getShort();
+    myTimestamp = in.getLong();
+
+    if (myQueueSize > myQueueCapacity) return false;
+
+    for (size_t i = 0; i < myQueueSize; i++)
+      myQueue[i].deserialize(in);
+  }
+  catch(...) {
+    cerr << "ERROR: failed to load bus transaction queue\n";
+    return false;
+  }
+
   return true;
 }
 
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
-void BusTransactionQueue::Transaction::serialize(Serializer& serializer) const
+void BusTransactionQueue::Transaction::serialize(Serializer& out) const
 {
-  serializer.putShort(address);
-  serializer.putShort(mask);
-  serializer.putByte(value);
-  serializer.putLong(timestamp);
-  serializer.putBool(yield);
+  out.putShort(address);
+  out.putShort(mask);
+  out.putByte(value);
+  out.putLong(timestamp);
+  out.putBool(yield);
+}
+
+// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+void BusTransactionQueue::Transaction::deserialize(Serializer& in)
+{
+  address = in.getShort();
+  mask = in.getShort();
+  value = in.getByte();
+  timestamp = in.getLong();
+  yield = in.getBool();
 }
 
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
diff --git a/src/emucore/elf/BusTransactionQueue.hxx b/src/emucore/elf/BusTransactionQueue.hxx
index 3f4bace5f..35f20aa6f 100644
--- a/src/emucore/elf/BusTransactionQueue.hxx
+++ b/src/emucore/elf/BusTransactionQueue.hxx
@@ -37,7 +37,8 @@ class BusTransactionQueue: public Serializable {
       uInt64 timestamp{0};
       bool yield{false};
 
-      void serialize(Serializer& serializer) const;
+      void serialize(Serializer& out) const;
+      void deserialize(Serializer& in);
     };
 
   public:
@@ -46,8 +47,8 @@ class BusTransactionQueue: public Serializable {
 
     BusTransactionQueue& reset();
 
-    bool save(Serializer& serializer) const override;
-    bool load(Serializer& serializer) override;
+    bool save(Serializer& out) const override;
+    bool load(Serializer& in) override;
 
     BusTransactionQueue& setNextInjectAddress(uInt16 address);
     uInt16 getNextInjectAddress() const;
diff --git a/src/emucore/elf/VcsLib.cxx b/src/emucore/elf/VcsLib.cxx
index 83f193542..6798d27a7 100644
--- a/src/emucore/elf/VcsLib.cxx
+++ b/src/emucore/elf/VcsLib.cxx
@@ -112,18 +112,18 @@ VcsLib::VcsLib(BusTransactionQueue& transactionQueue)
 }
 
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
-bool VcsLib::save(Serializer& serializer) const
+bool VcsLib::save(Serializer& out) const
 {
   try {
-    serializer.putByte(myStuffMaskA);
-    serializer.putByte(myStuffMaskX);
-    serializer.putByte(myStuffMaskY);
-    serializer.putBool(myIsWaitingForRead);
-    serializer.putShort(myWaitingForReadAddress);
-    serializer.putShort(myCurrentAddress);
-    serializer.putBool(myCurrentValue);
+    out.putByte(myStuffMaskA);
+    out.putByte(myStuffMaskX);
+    out.putByte(myStuffMaskY);
+    out.putBool(myIsWaitingForRead);
+    out.putShort(myWaitingForReadAddress);
+    out.putShort(myCurrentAddress);
+    out.putBool(myCurrentValue);
 
-    if (!myRand.save(serializer)) return false;
+    if (!myRand.save(out)) return false;
   }
   catch (...) {
     cerr << "ERROR: failed to save vcslib\n";
@@ -134,9 +134,27 @@ bool VcsLib::save(Serializer& serializer) const
 }
 
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
-bool VcsLib::load(Serializer& serializer)
+bool VcsLib::load(Serializer& in)
 {
-  return false;
+  reset();
+
+  try {
+    myStuffMaskA = in.getByte();
+    myStuffMaskX = in.getByte();
+    myStuffMaskY = in.getByte();
+    myIsWaitingForRead = in.getBool();
+    myWaitingForReadAddress = in.getShort();
+    myCurrentAddress = in.getShort();
+    myCurrentValue = in.getBool();
+
+    if (!myRand.load(in)) return false;
+  }
+  catch(...) {
+    cerr << "ERROR: failed to load vcslib\n";
+    return false;
+  }
+
+  return true;
 }
 
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
diff --git a/src/emucore/elf/VcsLib.hxx b/src/emucore/elf/VcsLib.hxx
index 22140cab3..0fab154ae 100644
--- a/src/emucore/elf/VcsLib.hxx
+++ b/src/emucore/elf/VcsLib.hxx
@@ -31,8 +31,8 @@ class VcsLib: public CortexM0::BusTransactionDelegate, public Serializable {
     explicit VcsLib(BusTransactionQueue& transactionQueue);
     ~VcsLib() override = default;
 
-    bool save(Serializer& serializer) const override;
-    bool load(Serializer& serializer) override;
+    bool save(Serializer& out) const override;
+    bool load(Serializer& in) override;
 
     void reset();