refine it some more

src/GPU.cpp

@@ -1096,6 +1096,24 @@ void FinishFrame(u32 lines)
     }
 }
 
+void BlankFrame()
+{
+    int backbuf = FrontBuffer ? 0 : 1;
+    int fbsize;
+    if (GPU3D::CurrentRenderer->Accelerated)
+        fbsize = (256*3 + 1) * 192;
+    else
+        fbsize = 256 * 192;
+
+    memset(Framebuffer[backbuf][0], 0, fbsize*4);
+    memset(Framebuffer[backbuf][1], 0, fbsize*4);
+
+    FrontBuffer = backbuf;
+    AssignFramebuffers();
+
+    TotalScanlines = 263;
+}
+
 void StartScanline(u32 line)
 {
     if (line == 0)

src/GPU.h

@@ -607,6 +607,7 @@ void SetPowerCnt(u32 val);
 
 void StartFrame();
 void FinishFrame(u32 lines);
+void BlankFrame();
 void StartScanline(u32 line);
 void StartHBlank(u32 line);
 

src/NDS.cpp

@@ -1128,6 +1128,8 @@ u32 RunFrame()
 {
     FrameStartTimestamp = SysTimestamp;
 
+    GPU::TotalScanlines = 0;
+
     LagFrameFlag = true;
     bool runFrame = Running && !(CPUStop & CPUStop_Sleep);
     while (Running)
@@ -1158,7 +1160,7 @@ u32 RunFrame()
             }
 
             if (SysTimestamp >= frametarget)
-                GPU::TotalScanlines = 263;
+                GPU::BlankFrame();
         }
         else
         {
@@ -1237,9 +1239,6 @@ u32 RunFrame()
 
                 if (CPUStop & CPUStop_Sleep)
                 {
-                    // checkme: when is sleep mode effective?
-                    //CancelEvent(Event_LCD);
-                    //GPU::TotalScanlines = 263;
                     break;
                 }
             }
@@ -1259,7 +1258,6 @@ u32 RunFrame()
         break;
     }
 
-printf("FRAME %08X %d %016llX\n", CPUStop, GPU::TotalScanlines, SysTimestamp-FrameStartTimestamp);
     // In the context of TASes, frame count is traditionally the primary measure of emulated time,
     // so it needs to be tracked even if NDS is powered off.
     NumFrames++;