#2 Generate raster interrupt only once per line fix

hagronnestad · Apr 4, 2020 · 3a55a5f · 3a55a5f
1 parent 108699b
commit 3a55a5f
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/ComputerSystems/Commodore64/Vic/VicIi.cs b/ComputerSystems/Commodore64/Vic/VicIi.cs
@@ -171,7 +171,7 @@ public void Cycle() {
             // Every cycle draws 8 pixels to the screen
 
             // Generate raster interrupt if the current line equals interrupt line
-            if (InterruptControlRegisterRasterInterruptEnabled && CurrentLine == _rasterLineToGenerateInterruptAt) {
+            if (CurrentLineCycle == 0 && InterruptControlRegisterRasterInterruptEnabled && CurrentLine == _rasterLineToGenerateInterruptAt) {
                 _interruptLatchRasterLine = true;
                 OnGenerateRasterLineInterrupt?.Invoke(this, null);
             }