diff --git a/Components/6845/CRTC6845.hpp b/Components/6845/CRTC6845.hpp
index 3b366691a..51b798b21 100644
--- a/Components/6845/CRTC6845.hpp
+++ b/Components/6845/CRTC6845.hpp
@@ -112,13 +112,11 @@ public:
 			case 6:	layout_.vertical.displayed = value & 0x7f;	break;
 			case 7:	layout_.vertical.start_sync = value & 0x7f;	break;
 			case 8:
-				// TODO: an error elsewhere appears to cause modes other than InterlaceMode::Off never to hit
-				// vertical sync.
-//				switch(value & 3) {
-//					default:	layout_.interlace_mode_ = InterlaceMode::Off;			break;
-//					case 0b01:	layout_.interlace_mode_ = InterlaceMode::Sync;			break;
-//					case 0b11:	layout_.interlace_mode_ = InterlaceMode::SyncAndVideo;	break;
-//				}
+				switch(value & 3) {
+					default:	layout_.interlace_mode_ = InterlaceMode::Off;			break;
+					case 0b01:	layout_.interlace_mode_ = InterlaceMode::Sync;			break;
+					case 0b11:	layout_.interlace_mode_ = InterlaceMode::SyncAndVideo;	break;
+				}
 
 				// Per CPC documentation, skew doesn't work on a "type 1 or 2", i.e. an MC6845 or a UM6845R.
 				if(personality != Personality::UM6845R && personality != Personality::MC6845) {
diff --git a/Machines/Acorn/BBCMicro/BBCMicro.cpp b/Machines/Acorn/BBCMicro/BBCMicro.cpp
index c22f55432..13cf9d147 100644
--- a/Machines/Acorn/BBCMicro/BBCMicro.cpp
+++ b/Machines/Acorn/BBCMicro/BBCMicro.cpp
@@ -120,9 +120,9 @@ struct SystemVIAPortHandler: public MOS::MOS6522::IRQDelegatePortHandler {
 		audio_(audio), video_base_(video_base), via_(via)
 	{
 		// Set initial mode to mode 0.
-		set_key(7, true);
-		set_key(8, true);
-		set_key(9, true);
+//		set_key(7, true);
+//		set_key(8, true);
+//		set_key(9, true);
 	}
 
 	// CA2: key pressed;