added _cyclesLo and _cyclesHi to debugger prompt

src/debugger/Debugger.cxx

@@ -99,6 +99,8 @@ static const char* const pseudo_registers[][2] = {
   { "_cclocks", "Color clocks on current scanline" },
   { "_fcount", "Number of frames since emulation started" },
   { "_fcycles", "Number of cycles since frame started" },
+  { "_cyclesLo", "Lower 32 bits of number of cycles since emulation started"},
+  { "_cyclesHi", "Higher 32 bits of number of cycles since emulation started"},
   { "_rwport", "Address at which a read from a write port occurred" },
   { "_scan", "Current scanline count" },
   { "_vblank", "Whether vertical blank is enabled (1 or 0)" },

src/debugger/TIADebug.cxx

@@ -700,6 +700,18 @@ int TIADebug::frameCycles() const
   return myTIA.frameCycles();
 }
 
+// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+int TIADebug::cyclesLo() const
+{
+  return (int)myTIA.cycles();
+}
+
+// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+int TIADebug::cyclesHi() const
+{
+  return (int)(myTIA.cycles() >> 32);
+}
+
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 int TIADebug::scanlines() const
 {

src/debugger/TIADebug.hxx

@@ -160,6 +160,8 @@ class TIADebug : public DebuggerSystem
     int scanlinesLastFrame() const;
     int frameCount() const;
     int frameCycles() const;
+    int cyclesLo() const;
+    int cyclesHi() const;
     int clocksThisLine() const;
     bool vsync() const;
     bool vblank() const;

src/emucore/tia/TIA.cxx

@@ -819,6 +819,12 @@ uInt32 TIA::frameCycles() const
   return uInt32(mySystem->cycles() - myCyclesAtFrameStart);
 }
 
+// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+uInt64 TIA::cycles() const
+{
+  return uInt64(mySystem->cycles());
+}
+
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 bool TIA::electronBeamPos(uInt32& x, uInt32& y) const
 {

src/emucore/tia/TIA.hxx

@@ -263,6 +263,11 @@ class TIA : public Device
     */
     uInt32 frameCycles() const;
 
+    /**
+    Answers the total system cycles from the start of the current ROM's emulation.
+    */
+    uInt64 cycles() const;
+
     /**
       Answers whether the TIA is currently in being rendered
       (we're in between the start and end of drawing a frame).

src/yacc/YaccParser.cxx

@@ -219,6 +219,10 @@ TiaMethod getTiaSpecial(char* ch)
     return &TIADebug::frameCount;
   else if(BSPF::equalsIgnoreCase(ch, "_fcycles"))
     return &TIADebug::frameCycles;
+  else if(BSPF::equalsIgnoreCase(ch, "_cyclesLo"))
+    return &TIADebug::cyclesLo;
+  else if(BSPF::equalsIgnoreCase(ch, "_cyclesHi"))
+    return &TIADebug::cyclesHi;
   else if(BSPF::equalsIgnoreCase(ch, "_cclocks"))
     return &TIADebug::clocksThisLine;
   else if(BSPF::equalsIgnoreCase(ch, "_vsync"))