Well, that didn't take long. I went ahead and added the ability

to erase/load/save the Flash memory in the FA2 scheme (it's stored
in the Harmony cart, but emulated with a file).  This is a debugger,
so it might as well have access to all the lower-level stuff in
the cart.


git-svn-id: svn://svn.code.sf.net/p/stella/code/trunk@2697 8b62c5a3-ac7e-4cc8-8f21-d9a121418aba

src/debugger/gui/CartDebugWidget.hxx

@@ -41,7 +41,8 @@ class CartDebugWidget : public Widget, public CommandSender
         CommandSender(boss),
         myFontWidth(font.getMaxCharWidth()),
         myFontHeight(font.getFontHeight()),
-        myLineHeight(font.getLineHeight())
+        myLineHeight(font.getLineHeight()),
+        myButtonHeight(myLineHeight + 4)
     {
       _type = kCartDebugWidget;
     }
@@ -108,7 +109,7 @@ class CartDebugWidget : public Widget, public CommandSender
   protected:
     // These will be needed by most of the child classes;
     // we may as well make them protected variables
-    int myFontWidth, myFontHeight, myLineHeight;
+    int myFontWidth, myFontHeight, myLineHeight, myButtonHeight;
 
   private:
     StringListWidget* myDesc;

src/debugger/gui/CartFA2Widget.cxx

@@ -34,8 +34,7 @@ CartridgeFA2Widget::CartridgeFA2Widget(
   info << "Modified FA RAM+, six or seven 4K banks\n"
        << "256 bytes RAM @ $F000 - $F1FF\n"
        << "  $F100 - $F1FF (R), $F000 - $F0FF (W)\n"
-       << "RAM can be loaded/saved to Harmony flash by accessing $FF4 "
-          "(not currently accessible)\n"
+       << "RAM can be loaded/saved to Harmony flash by accessing $FF4\n"
        << "Startup bank = " << cart.myStartBank << "\n";
 
   // Eventually, we should query this from the debugger/disassembler
@@ -68,6 +67,34 @@ CartridgeFA2Widget::CartridgeFA2Widget(
                     font.getStringWidth("Set bank: "), kBankChanged);
   myBank->setTarget(this);
   addFocusWidget(myBank);
+  ypos += myLineHeight + 20;
+
+  const int bwidth = font.getStringWidth("Erase") + 20;
+
+  StaticTextWidget* t = new StaticTextWidget(boss, font, xpos, ypos,
+      font.getStringWidth("Harmony Flash: "),
+      myFontHeight, "Harmony Flash: ", kTextAlignLeft);
+
+  xpos += t->getWidth() + 4;
+  myFlashErase =
+    new ButtonWidget(boss, font, xpos, ypos-4, bwidth, myButtonHeight,
+                     "Erase", kFlashErase);
+  myFlashErase->setTarget(this);
+  addFocusWidget(myFlashErase);
+  xpos += myFlashErase->getWidth() + 8;
+
+  myFlashLoad =
+    new ButtonWidget(boss, font, xpos, ypos-4, bwidth, myButtonHeight,
+                     "Load", kFlashLoad);
+  myFlashLoad->setTarget(this);
+  addFocusWidget(myFlashLoad);
+  xpos += myFlashLoad->getWidth() + 8;
+
+  myFlashSave =
+    new ButtonWidget(boss, font, xpos, ypos-4, bwidth, myButtonHeight,
+                     "Save", kFlashSave);
+  myFlashSave->setTarget(this);
+  addFocusWidget(myFlashSave);
 }
 
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
@@ -82,11 +109,25 @@ void CartridgeFA2Widget::loadConfig()
 void CartridgeFA2Widget::handleCommand(CommandSender* sender,
                                       int cmd, int data, int id)
 {
-  if(cmd == kBankChanged)
+  switch(cmd)
   {
+    case kBankChanged:
       myCart.unlockBank();
       myCart.bank(myBank->getSelected());
       myCart.lockBank();
       invalidate();
+      break;
+
+    case kFlashErase:
+      myCart.flash(0);
+      break;
+
+    case kFlashLoad:
+      myCart.flash(1);
+      break;
+
+    case kFlashSave:
+      myCart.flash(2);
+      break;
   }
 }

src/debugger/gui/CartFA2Widget.hxx

@@ -21,6 +21,7 @@
 #define CARTRIDGEFA2_WIDGET_HXX
 
 class CartridgeFA2;
+class ButtonWidget;
 class PopUpWidget;
 
 #include "CartDebugWidget.hxx"
@@ -39,8 +40,14 @@ class CartridgeFA2Widget : public CartDebugWidget
   private:
     CartridgeFA2& myCart;
     PopUpWidget* myBank;
+    ButtonWidget *myFlashErase, *myFlashLoad, *myFlashSave;
 
-    enum { kBankChanged = 'bkCH' };
+    enum {
+      kBankChanged = 'bkCH',
+      kFlashErase  = 'flER',
+      kFlashLoad   = 'flLD',
+      kFlashSave   = 'flSV'
+    };
 };
 
 #endif

src/emucore/CartFA2.cxx

@@ -432,3 +432,47 @@ uInt8 CartridgeFA2::ramReadWrite()
       return myImage[(myCurrentBank << 12) + 0xFF4] | 0x40;
   }
 }
+
+// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+void CartridgeFA2::flash(uInt8 operation)
+{
+  Serializer serializer(myFlashFile);
+  if(serializer.isValid())
+  {
+    if(operation == 0)       // erase
+    {
+      try
+      {
+        uInt8 buf[256];
+        memset(buf, 0, 256);
+        serializer.putByteArray(buf, 256);
+      }
+      catch(...)
+      {
+      }
+    }
+    else if(operation == 1)  // read
+    {
+      try
+      {
+        serializer.getByteArray(myRAM, 256);
+      }
+      catch(...)
+      {
+        memset(myRAM, 0, 256);
+      }
+    }
+    else if(operation == 2)  // write
+    {
+      try
+      {
+        serializer.putByteArray(myRAM, 256);
+      }
+      catch(...)
+      {
+        // Maybe add logging here that save failed?
+        cerr << name() << ": ERROR saving score table" << endl;
+      }
+    }
+  }
+}

src/emucore/CartFA2.hxx

@@ -180,6 +180,15 @@ class CartridgeFA2 : public Cartridge
     */
     uInt8 ramReadWrite();
 
+    /**
+      Modify Harmony flash directly (represented by a file in emulation),
+      ignoring any timing emulation.  This is for use strictly in the
+      debugger, so you can have low-level access to the Flash media.
+
+      @param operation  0 for erase, 1 for read, 2 for write
+    */
+    void flash(uInt8 operation);
+
   private:
     // OSsytem currently in use
     const OSystem& myOSystem;