Support manual height, remove vertical centering logic (no easy way to get this to work with ystart autodetect).

src/emucore/Console.cxx

@@ -511,6 +511,7 @@ void Console::changeHeight(int direction)
   if(direction == +1)       // increase Height
   {
     height++;
+    if (height < 210) height = 210;
     if(height > 256 || height > dheight)
     {
       myOSystem.frameBuffer().showMessage("Height at maximum");
@@ -520,11 +521,7 @@ void Console::changeHeight(int direction)
   else if(direction == -1)  // decrease Height
   {
     height--;
-    if(height < 210)
+    if(height < 210) height = 0;
-    {
-      myOSystem.frameBuffer().showMessage("Height at minimum");
-      return;
-    }
   }
   else
     return;
@@ -546,7 +543,7 @@ void Console::setTIAProperties()
   uInt32 ystart = atoi(myProperties.get(Display_YStart).c_str());
   if(ystart > 64) ystart = 64;
   uInt32 height = atoi(myProperties.get(Display_Height).c_str());
-  if(height < 210)      height = 210;
+  if(height < 210 && height != 0)      height = 210;
   else if(height > 256) height = 256;
 
   if(myDisplayFormat == "NTSC" || myDisplayFormat == "PAL60" ||
@@ -563,18 +560,9 @@ void Console::setTIAProperties()
     myConsoleInfo.InitialFrameRate = "50";
 
     // PAL ROMs normally need at least 250 lines
-    height = std::max(height, 250u);
+    if (height !=  0) height = std::max(height, 250u);
   }
 
-  // Make sure these values fit within the bounds of the desktop
-  // If not, attempt to center vertically
-  uInt32 dheight = myOSystem.frameBuffer().desktopSize().h;
-  if(height > dheight)
-  {
-    ystart += height - dheight;
-    ystart = std::min(ystart, 64u);
-    height = dheight;
-  }
   myTIA->setYStart(ystart);
   myTIA->setHeight(height);
 }

src/emucore/Props.cxx

@@ -322,7 +322,7 @@ const char* Properties::ourDefaultProperties[LastPropType] = {
   "AUTO",      // Controller.MouseAxis
   "AUTO",      // Display.Format
   "0",         // Display.YStart
-  "210",       // Display.Height
+  "0",         // Display.Height
   "NO",        // Display.Phosphor
   "77"         // Display.PPBlend
 };

src/emucore/tia/FrameManager.cxx

@@ -45,6 +45,7 @@ static constexpr uInt32
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 FrameManager::FrameManager()
   : myMode(TvMode::pal),
+    myFixedHeight(0),
     myVblankMode(VblankMode::floating),
     myYstart(0)
 {
@@ -100,9 +101,8 @@ void FrameManager::nextLine()
       break;
 
     case State::frame:
-      if (myLineInState >= myKernelLines + Metrics::visibleOverscan) {
+      if (myLineInState >= (myFixedHeight > 0 ? myFixedHeight : (myKernelLines + Metrics::visibleOverscan)))
         finalizeFrame();
-      }
       break;
 
     default:
@@ -234,7 +234,15 @@ TvMode FrameManager::tvMode() const
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 uInt32 FrameManager::height() const
 {
-  return myKernelLines + Metrics::visibleOverscan;
+  return myFixedHeight > 0 ? myFixedHeight : (myKernelLines + Metrics::visibleOverscan);
+}
+
+// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+void FrameManager::setFixedHeight(uInt32 height)
+{
+  myFixedHeight = height;
+
+  (cout << myFixedHeight << "\n").flush();
 }
 
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

src/emucore/tia/FrameManager.hxx

@@ -55,6 +55,8 @@ class FrameManager : public Serializable
 
     uInt32 height() const;
 
+    void setFixedHeight(uInt32 height);
+
     uInt32 currentLine() const;
 
     uInt32 scanlines() const;
@@ -129,6 +131,7 @@ class FrameManager : public Serializable
     uInt32 myKernelLines;
     uInt32 myOverscanLines;
     uInt32 myFrameLines;
+    uInt32 myFixedHeight;
 
     VblankMode myVblankMode;
     uInt32 myLastVblankLines;

src/emucore/tia/TIA.cxx

@@ -614,27 +614,24 @@ void TIA::update()
 }
 
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
-// TODO: stub
 uInt32 TIA::height() const
 {
   return myFrameManager.height();
 }
 
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
-// TODO: stub
 uInt32 TIA::ystart() const
 {
   return myFrameManager.ystart();
 }
 
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
-// TODO: stub
 void TIA::setHeight(uInt32 height)
 {
+  myFrameManager.setFixedHeight(height);
 }
 
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
-// TODO: stub
 void TIA::setYStart(uInt32 ystart)
 {
   myFrameManager.setYstart(ystart);