diff --git a/src/debugger/gui/CartDPCPlusWidget.hxx b/src/debugger/gui/CartDPCPlusWidget.hxx
index e233fe402..b5c58fb88 100644
--- a/src/debugger/gui/CartDPCPlusWidget.hxx
+++ b/src/debugger/gui/CartDPCPlusWidget.hxx
@@ -85,7 +85,7 @@ class CartridgeDPCPlusWidget : public CartDebugWidget
     CheckboxWidget* myIMLDA;
     DataGridWidget* myRandom;
 
-    CartState myState, myOldState;
+    CartState myOldState;
 
     enum { kBankChanged = 'bkCH' };
 };
diff --git a/src/debugger/gui/CartDPCWidget.cxx b/src/debugger/gui/CartDPCWidget.cxx
index 68d30b994..d4fa040b3 100644
--- a/src/debugger/gui/CartDPCWidget.cxx
+++ b/src/debugger/gui/CartDPCWidget.cxx
@@ -147,11 +147,12 @@ void CartridgeDPCWidget::saveOldState()
     myOldState.flags.push_back(myCart.myFlags[i]);
   }
   for(int i = 0; i < 3; ++i)
-  {
     myOldState.music.push_back(myCart.myMusicMode[i]);
-  }
 
   myOldState.random = myCart.myRandomNumber;
+
+  for(int i = 0; i < internalRamSize(); ++i)
+    myOldState.internalram.push_back(myCart.myDisplayImage[i]);
 }
 
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
@@ -234,3 +235,56 @@ string CartridgeDPCWidget::bankState()
 
   return buf.str();
 }
+
+// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+uInt32 CartridgeDPCWidget::internalRamSize() 
+{
+  return 2*1024;
+}
+
+// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+uInt32 CartridgeDPCWidget::internalRamRPort(int start)
+{
+  return 0x0000 + start;
+}
+
+// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+string CartridgeDPCWidget::internalRamDescription() 
+{
+  ostringstream desc;
+  desc << "$0000 - $07FF - 2K display data\n"
+       << "                indirectly accessible to 6507\n"
+       << "                via DPC+'s Data Fetcher registers\n";
+  
+  return desc.str();
+}
+
+// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+const ByteArray& CartridgeDPCWidget::internalRamOld(int start, int count)
+{
+  myRamOld.clear();
+  for(int i = 0; i < count; i++)
+    myRamOld.push_back(myOldState.internalram[start + i]);
+  return myRamOld;
+}
+
+// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+const ByteArray& CartridgeDPCWidget::internalRamCurrent(int start, int count)
+{
+  myRamCurrent.clear();
+  for(int i = 0; i < count; i++)
+    myRamCurrent.push_back(myCart.myDisplayImage[start + i]);
+  return myRamCurrent;
+}
+
+// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+void CartridgeDPCWidget::internalRamSetValue(int addr, uInt8 value)
+{
+  myCart.myDisplayImage[addr] = value;
+}
+
+// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+uInt8 CartridgeDPCWidget::internalRamGetValue(int addr)
+{
+  return myCart.myDisplayImage[addr];
+}
diff --git a/src/debugger/gui/CartDPCWidget.hxx b/src/debugger/gui/CartDPCWidget.hxx
index 376a95428..50892b30a 100644
--- a/src/debugger/gui/CartDPCWidget.hxx
+++ b/src/debugger/gui/CartDPCWidget.hxx
@@ -42,6 +42,16 @@ class CartridgeDPCWidget : public CartDebugWidget
 
     string bankState();
 
+    // start of functions for Cartridge RAM tab
+    uInt32 internalRamSize();
+    uInt32 internalRamRPort(int start);
+    string internalRamDescription(); 
+    const ByteArray& internalRamOld(int start, int count);
+    const ByteArray& internalRamCurrent(int start, int count);
+    void internalRamSetValue(int addr, uInt8 value);
+    uInt8 internalRamGetValue(int addr);
+    // end of functions for Cartridge RAM tab   
+
   private:
     struct CartState {
       ByteArray tops;
@@ -50,6 +60,7 @@ class CartridgeDPCWidget : public CartDebugWidget
       ByteArray flags;
       BoolArray music;
       uInt8 random;
+      ByteArray internalram;
     };
 
   private: