Fixed debugger 'runto' command; it was case sensitive, so it never

matched anything most of the time.  Also, as this operation can take
a somewhat long time on slower systems, a progress bar is now shown.

Fixed handling of bit 6 in VBLANK TIA register, which is related to
how INPT4 and INPT5 are handled.  This fixes at least one ROM that
should have failed in Stella, but didn't.


git-svn-id: svn://svn.code.sf.net/p/stella/code/trunk@2096 8b62c5a3-ac7e-4cc8-8f21-d9a121418aba

Changes.txt

@@ -34,16 +34,22 @@
     now works exactly like an axis in UI mode (holding down a direction
     continues that direction until the hat is released/centered).
 
-  * Several improvements to the debugger.  User labels are now supported
-    again, the debugger window can be resized between ROM loads
-    (previously, the app had to be restarted), and a vertical line
-    separates the disassembly from the raw bytes.
+  * Several improvements to the debugger:
+      - user labels are now supported again
+      - the debugger window can be resized between ROM loads (previously,
+        the app had to be restarted)
+      - a vertical line separates the disassembly from the raw bytes
+      - 'runto' debugger command is now case-insensitive, and shows a
+        progressbar while searching through the disassembly
 
   * Fixed behaviour of SWCHB and SWBCNT; pins set to output now remember
     the values previously written.  Some ROMs use this functionality for
     extra storage.  Special thanks to Omegamatrix of AtariAge for advice
     and test ROMs in this area.
 
+  * Fixed bug in handling INPT4/INPT5 latches from VBLANK; a least one
+    ROM was working in Stella when it didn't on real hardware.
+
   * Added 'finishing touches' to some of the UI descriptions, giving a
     better explanation of the functions.  Related to this, certain
     options now show a message box explaining the option in further

src/common/bspf.hxx

@@ -63,6 +63,7 @@
 
 // The following code should provide access to the standard C++ objects and
 // types: cout, cerr, string, ostream, istream, etc.
+#include <algorithm>
 #include <iostream>
 #include <iomanip>
 #include <string>
@@ -122,6 +123,17 @@ inline bool BSPF_equalsIgnoreCase(const char* s1, const char* s2)
   return BSPF_strcasecmp(s1, s2) == 0;
 }
 
+static bool BSPF_equalsIgnoreCaseChar(char ch1, char ch2)
+{
+  return toupper((unsigned char)ch1) == toupper((unsigned char)ch2);
+}
+inline size_t BSPF_findIgnoreCase(const string& s1, const string& s2)
+{
+  string::const_iterator pos = std::search(s1.begin(), s1.end(),
+    s2.begin(), s2.end(), BSPF_equalsIgnoreCaseChar);
+  return pos == s1.end() ? string::npos : pos - s1.begin();
+}
+
 static const string EmptyString("");
 
 #ifdef _WIN32_WCE

src/debugger/DebuggerParser.cxx

@@ -32,6 +32,7 @@
 #include "Expression.hxx"
 #include "FSNode.hxx"
 #include "RomWidget.hxx"
+#include "ProgressDialog.hxx"
 
 #ifdef CHEATCODE_SUPPORT
   #include "CheatManager.hxx"
@@ -1115,7 +1116,16 @@ void DebuggerParser::executeRunTo()
   const CartDebug& cartdbg = debugger->cartDebug();
   const CartDebug::DisassemblyList& list = cartdbg.disassembly().list;
 
-  uInt32 count = 0;
+  uInt32 count = 0, max_iterations = list.size();
+
+  // Create a progress dialog box to show the progress searching through the
+  // disassembly, since this may be a time-consuming operation
+  ostringstream buf;
+  buf << "RunTo searching through " << max_iterations << " disassembled instructions";
+  ProgressDialog progress(debugger->myBaseDialog,
+      debugger->getOSystem()->consoleFont(), buf.str());
+  progress.setRange(0, max_iterations, 5);
+
   bool done = false;
   do {
     debugger->step();
@@ -1125,10 +1135,13 @@ void DebuggerParser::executeRunTo()
     if(pcline >= 0)
     {
       const string& next = list[pcline].disasm;
-      done = (next.find(argStrings[0]) != string::npos);
+      done = (BSPF_findIgnoreCase(next, argStrings[0]) != string::npos);
     }
-    ++count;
-  } while(!done && count < list.size());
+    // Update the progress bar
+    progress.setProgress(count);
+  } while(!done && ++count < max_iterations);
+
+  progress.close();
 
   if(done)
     commandResult

src/emucore/TIA.cxx

@@ -169,6 +169,7 @@ void TIA::reset()
 
   myDumpEnabled = false;
   myDumpDisabledCycle = 0;
+  myINPT4 = myINPT5 = 0x80;
 
   // Should undriven pins be randomly driven high or low?
   myTIAPinsDriven = mySettings.getBool("tiadriven");
@@ -1241,14 +1242,22 @@ uInt8 TIA::peek(uInt16 addr)
       break;
 
     case INPT4:
-      value = (value & 0x7F) |
-        (myConsole.controller(Controller::Left).read(Controller::Six) ? 0x80 : 0x00);
+    {
+      uInt8 button = (myConsole.controller(Controller::Left).read(Controller::Six) ? 0x80 : 0x00);
+      myINPT4 = (myVBLANK & 0x40) ? (myINPT4 & button) : button;
+
+      value = (value & 0x7F) | myINPT4;
       break;
+    }
 
     case INPT5:
-      value = (value & 0x7F) |
-        (myConsole.controller(Controller::Right).read(Controller::Six) ? 0x80 : 0x00);
+    {
+      uInt8 button = (myConsole.controller(Controller::Right).read(Controller::Six) ? 0x80 : 0x00);
+      myINPT5 = (myVBLANK & 0x40) ? (myINPT5 & button) : button;
+
+      value = (value & 0x7F) | myINPT5;
       break;
+    }
 
     default:
       break;
@@ -1321,6 +1330,10 @@ bool TIA::poke(uInt16 addr, uInt8 value)
         myDumpDisabledCycle = mySystem->cycles();
       }
 
+      // Are the latches for I4 and I5 being set?
+      if (!(myVBLANK & 0x40))
+        myINPT4 = myINPT5 = 0x80;
+
 #if 0 // TODO - this isn't yet complete
       // Check for the first scanline at which VBLANK is disabled.
       // Usually, this will be the first scanline to start drawing.

src/emucore/TIA.hxx

@@ -558,6 +558,9 @@ class TIA : public Device
     // Indicates if the dump is current enabled for the paddles
     bool myDumpEnabled;
 
+    // Latches for INPT4 and INPT5
+    uInt8 myINPT4, myINPT5;
+
     // Indicates if HMOVE blanks are currently or previously enabled,
     // and at which horizontal position the HMOVE was initiated
     Int32 myCurrentHMOVEPos;