diff --git a/LEGO1/legovideomanager.cpp b/LEGO1/legovideomanager.cpp
index 92440dd4..5956da52 100644
--- a/LEGO1/legovideomanager.cpp
+++ b/LEGO1/legovideomanager.cpp
@@ -75,10 +75,52 @@ void LegoVideoManager::EnableFullScreenMovie(MxBool p_enable)
 	EnableFullScreenMovie(p_enable, TRUE);
 }
 
-// STUB: LEGO1 0x1007c310
+// FUNCTION: LEGO1 0x1007c310
 void LegoVideoManager::EnableFullScreenMovie(MxBool p_enable, MxBool p_scale)
 {
-	// TODO
+	if (m_isFullscreenMovie != p_enable) {
+		m_isFullscreenMovie = p_enable;
+
+		if (p_enable) {
+			m_palette = m_videoParam.GetPalette()->Clone();
+			OverrideSkyColor(FALSE);
+
+			m_videoParam.Flags().SetF1bit7(p_scale);
+
+			m_unk0xe4 = FALSE;
+			m_unk0x500 = TRUE;
+		}
+		else {
+			m_displaySurface->FUN_100ba640();
+			m_videoParam.Flags().SetF1bit7(p_scale);
+
+			// restore previous pallete
+			RealizePalette(m_palette);
+			delete m_palette;
+			m_palette = NULL;
+
+			// update region where video used to be
+			MxRect32 rect(
+				0,
+				0,
+				m_videoParam.GetRect().GetRight() - m_videoParam.GetRect().GetLeft(),
+				m_videoParam.GetRect().GetBottom() - m_videoParam.GetRect().GetTop()
+			);
+			InvalidateRect(rect);
+			UpdateRegion();
+
+			OverrideSkyColor(TRUE);
+			m_unk0xe4 = TRUE;
+			m_unk0x500 = FALSE;
+		}
+	}
+
+	if (p_enable) {
+		m_videoParam.Flags().SetF1bit7(p_scale);
+	}
+	else {
+		m_videoParam.Flags().SetF1bit7(FALSE);
+	}
 }
 
 // FUNCTION: LEGO1 0x1007c440
diff --git a/LEGO1/mxdisplaysurface.cpp b/LEGO1/mxdisplaysurface.cpp
index 957bc568..940e6e84 100644
--- a/LEGO1/mxdisplaysurface.cpp
+++ b/LEGO1/mxdisplaysurface.cpp
@@ -28,10 +28,55 @@ void MxDisplaySurface::Reset()
 	memset(&this->m_surfaceDesc, 0, sizeof(this->m_surfaceDesc));
 }
 
-// STUB: LEGO1 0x100ba640
+// FUNCTION: LEGO1 0x100ba640
 void MxDisplaySurface::FUN_100ba640()
 {
-	// TODO
+	int backbuffers;
+	DDSURFACEDESC desc;
+	HRESULT hr;
+	int height;
+
+	if (!m_videoParam.Flags().GetFlipSurfaces()) {
+		backbuffers = 1;
+	}
+	else {
+		backbuffers = m_videoParam.GetBackBuffers() + 1;
+	}
+
+	for (MxU32 i = 0; i < backbuffers; i++) {
+		memset(&desc, 0, sizeof(DDSURFACEDESC));
+
+		desc.dwSize = sizeof(DDSURFACEDESC);
+		hr = m_ddSurface2->Lock(NULL, &desc, DDLOCK_WAIT, NULL);
+		if (hr == DDERR_SURFACELOST) {
+			m_ddSurface2->Restore();
+			hr = m_ddSurface2->Lock(NULL, &desc, DDLOCK_WAIT, NULL);
+		}
+
+		if (hr != S_OK) {
+			return;
+		}
+
+		MxU8* surface = (MxU8*) desc.lpSurface;
+		height = m_videoParam.GetRect().GetBottom() - m_videoParam.GetRect().GetTop();
+		if (height != -1) {
+			do {
+				memset(
+					surface,
+					0,
+					(m_videoParam.GetRect().GetRight() - m_videoParam.GetRect().GetLeft() + 1) *
+						desc.ddpfPixelFormat.dwRGBBitCount
+				);
+
+				surface += desc.lPitch;
+			} while (height--);
+		}
+
+		m_ddSurface2->Unlock(desc.lpSurface);
+		if (m_videoParam.Flags().GetFlipSurfaces()) {
+			m_ddSurface1->Flip(NULL, 1);
+		}
+	}
 }
 
 // FUNCTION: LEGO1 0x100ba790