diff --git a/src/debugger/gui/Cart2KWidget.cxx b/src/debugger/gui/Cart2KWidget.cxx
index 9b70fb85e..a36da741b 100644
--- a/src/debugger/gui/Cart2KWidget.cxx
+++ b/src/debugger/gui/Cart2KWidget.cxx
@@ -26,6 +26,13 @@ Cartridge2KWidget::Cartridge2KWidget(
       int x, int y, int w, int h, Cartridge2K& cart)
   : CartDebugWidget(boss, font, x, y, w, h)
 {
-  addBaseInformation(2048, "Atari", "Standard 2K cartridge, non-bankswitched\n"
-                     "Accessible @ $1000 - $1FFF");
+  // Eventually, we should query this from the debugger/disassembler
+  uInt16 size = cart.mySize;
+  uInt16 start = (cart.myImage[size-3] << 8) | cart.myImage[size-2];
+  start -= start % size;
+
+  ostringstream info;
+  info << "Standard 2K cartridge, non-bankswitched\n"
+       << "Accessible @ $" << HEX4 << start << " - " << "$" << (start + size - 1);
+  addBaseInformation(size, "Atari", info.str());
 }
diff --git a/src/debugger/gui/Cart4KWidget.cxx b/src/debugger/gui/Cart4KWidget.cxx
index 149b95ca9..209da55da 100644
--- a/src/debugger/gui/Cart4KWidget.cxx
+++ b/src/debugger/gui/Cart4KWidget.cxx
@@ -26,7 +26,12 @@ Cartridge4KWidget::Cartridge4KWidget(
       int x, int y, int w, int h, Cartridge4K& cart)
   : CartDebugWidget(boss, font, x, y, w, h)
 {
-  uInt16 offset = (cart.myImage[0xFFD] << 8) | cart.myImage[0xFFC];
-  addBaseInformation(4096, "Atari", "Standard 4K cartridge, non-bankswitched\n"
-                     "Accessible @ $1000 - $1FFF");
+  // Eventually, we should query this from the debugger/disassembler
+  uInt16 start = (cart.myImage[0xFFD] << 8) | cart.myImage[0xFFC];
+  start -= start % 0x1000;
+
+  ostringstream info;
+  info << "Standard 4K cartridge, non-bankswitched\n"
+       << "Accessible @ $" << HEX4 << start << " - " << "$" << (start + 0xFFF);
+  addBaseInformation(4096, "Atari", info.str());
 }
diff --git a/src/debugger/gui/CartDebugWidget.hxx b/src/debugger/gui/CartDebugWidget.hxx
index 8bd04c61a..5cd4a7cb2 100644
--- a/src/debugger/gui/CartDebugWidget.hxx
+++ b/src/debugger/gui/CartDebugWidget.hxx
@@ -54,15 +54,19 @@ class CartDebugWidget : public Widget, public CommandSender
                 fwidth = _w - lwidth - 30;
       EditTextWidget* w = 0;
       StringListWidget* sw = 0;
+      ostringstream buf;
 
       int x = 10, y = 10;
 
       // Add ROM size, manufacturer and bankswitch info
       new StaticTextWidget(_boss, _font, x, y, lwidth,
             myFontHeight, "ROM Size: ", kTextAlignLeft);
+      buf << bytes << " bytes";
+      if(bytes >= 1024)
+        buf << " / " << (bytes/1024) << "KB";
+
       w = new EditTextWidget(_boss, _font, x+lwidth, y,
-            fwidth, myFontHeight, BSPF_toString(bytes) + " bytes / " +
-            BSPF_toString((bytes/1024)) + "KB");
+            fwidth, myFontHeight, buf.str());
       w->setEditable(false);
       y += myLineHeight + 4;
 
diff --git a/src/emucore/Cart2K.hxx b/src/emucore/Cart2K.hxx
index 9392972a9..d69ab9606 100644
--- a/src/emucore/Cart2K.hxx
+++ b/src/emucore/Cart2K.hxx
@@ -38,7 +38,7 @@ class System;
 */
 class Cartridge2K : public Cartridge
 {
-  friend class Cart2KWidget;
+  friend class Cartridge2KWidget;
 
   public:
     /**