From 3738fc1ca0244006b57ef612731d79b20522bcc4 Mon Sep 17 00:00:00 2001
From: urchlay <urchlay@8b62c5a3-ac7e-4cc8-8f21-d9a121418aba>
Date: Sat, 30 Jul 2005 19:14:35 +0000
Subject: [PATCH] saverom support for Pitfall II (DPC) cart type. Not the most
 efficient implementation possible, but not the worst either.

git-svn-id: svn://svn.code.sf.net/p/stella/code/trunk@703 8b62c5a3-ac7e-4cc8-8f21-d9a121418aba
---
 stella/src/emucore/CartDPC.cxx | 20 +++++++++++++++++++-
 stella/src/emucore/CartDPC.hxx |  9 +++++++--
 2 files changed, 26 insertions(+), 3 deletions(-)

diff --git a/stella/src/emucore/CartDPC.cxx b/stella/src/emucore/CartDPC.cxx
index 712bf7435..c30aaa0f6 100644
--- a/stella/src/emucore/CartDPC.cxx
+++ b/stella/src/emucore/CartDPC.cxx
@@ -13,7 +13,7 @@
 // See the file "license" for information on usage and redistribution of
 // this file, and for a DISCLAIMER OF ALL WARRANTIES.
 //
-// $Id: CartDPC.cxx,v 1.11 2005-06-28 01:15:17 urchlay Exp $
+// $Id: CartDPC.cxx,v 1.12 2005-07-30 19:14:35 urchlay Exp $
 //============================================================================
 
 #include <assert.h>
@@ -28,6 +28,11 @@ CartridgeDPC::CartridgeDPC(const uInt8* image, uInt32 size)
 {
   uInt32 addr;
 
+  // Make a copy of the entire image as-is, for use by getImage()
+  // (this wastes 12K of RAM, should be controlled by a #ifdef)
+  for(addr = 0; addr < size; ++addr)
+    myImageCopy[addr] = image[addr];
+
   // Copy the program ROM image into my buffer
   for(addr = 0; addr < 8192; ++addr)
   {
@@ -587,3 +592,16 @@ bool CartridgeDPC::load(Deserializer& in)
   return true;
 }
 
+// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+uInt8* CartridgeDPC::getImage(int& size) {
+  size = 8192 + 2048 + 255;
+
+  for(int i=0; i<8192; i++)
+    myImageCopy[i] = myProgramImage[i];
+
+  for(int i=0; i<2048; i++)
+    myImageCopy[i + 8192] = myDisplayImage[i];
+
+  return &myImageCopy[0];
+}
+
diff --git a/stella/src/emucore/CartDPC.hxx b/stella/src/emucore/CartDPC.hxx
index b9a919e9a..dac6e6973 100644
--- a/stella/src/emucore/CartDPC.hxx
+++ b/stella/src/emucore/CartDPC.hxx
@@ -13,7 +13,7 @@
 // See the file "license" for information on usage and redistribution of
 // this file, and for a DISCLAIMER OF ALL WARRANTIES.
 //
-// $Id: CartDPC.hxx,v 1.6 2005-06-28 01:15:17 urchlay Exp $
+// $Id: CartDPC.hxx,v 1.7 2005-07-30 19:14:35 urchlay Exp $
 //============================================================================
 
 #ifndef CARTRIDGEDCP_HXX
@@ -32,7 +32,7 @@ class Deserializer;
   see David P. Crane's United States Patent Number 4,644,495.
 
   @author  Bradford W. Mott
-  @version $Id: CartDPC.hxx,v 1.6 2005-06-28 01:15:17 urchlay Exp $
+  @version $Id: CartDPC.hxx,v 1.7 2005-07-30 19:14:35 urchlay Exp $
 */
 class CartridgeDPC : public Cartridge
 {
@@ -93,6 +93,8 @@ class CartridgeDPC : public Cartridge
     */
     virtual bool load(Deserializer& in);
 
+    virtual uInt8* getImage(int& size);
+
   public:
     /**
       Get the byte at the specified address.
@@ -142,6 +144,9 @@ class CartridgeDPC : public Cartridge
     // The 2K display ROM image of the cartridge
     uInt8 myDisplayImage[2048];
 
+    // Copy of the raw image, for use by getImage()
+    uInt8 myImageCopy[8192 + 2048 + 255];
+
     // The top registers for the data fetchers
     uInt8 myTops[8];