Fix initialization error in DPC+ scheme (fixes #489).

Changes.txt

@@ -93,6 +93,9 @@
     certain older DPC+ driver versions; this allows 'Epic Adventure' ROM
     to finally work in Stella.
 
+  * Fixed bug in DPC+ scheme; 'fast fetch mode' was enabled at startup,
+    when it should be disabled by default.
+
   * Certain buttons in the UI can now be activated repeatedly by holding
     down the mouse button (Time Machine, debugger step/trace/frame advance,
     etc.)

src/emucore/CartCTY.cxx

@@ -60,6 +60,10 @@ void CartridgeCTY::reset()
 
   myRAM[0] = myRAM[1] = myRAM[2] = myRAM[3] = 0xFF;
 
+  myLDAimmediate = false;
+  myRandomNumber = 0x2B435044;
+  myRamAccessTimeout = 0;
+
   myAudioCycles = 0;
   myFractionalClocks = 0.0;
 

src/emucore/CartDPCPlus.cxx

@@ -76,9 +76,6 @@ CartridgeDPCPlus::CartridgeDPCPlus(const ByteBuffer& image, uInt32 size,
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 void CartridgeDPCPlus::reset()
 {
-  myAudioCycles = myARMCycles = 0;
-  myFractionalClocks = 0.0;
-
   setInitialState();
 
   // DPC+ always starts in bank 5
@@ -110,6 +107,11 @@ void CartridgeDPCPlus::setInitialState()
 
   // Initialize the DPC's random number generator register (must be non-zero)
   myRandomNumber = 0x2B435044; // "DPC+"
+
+  // Initialize various other parameters
+  myFastFetch = myLDAimmediate = false;
+  myAudioCycles = myARMCycles = 0;
+  myFractionalClocks = 0.0;
 }
 
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -