--- hatari/src/falcon/videl.c	2019/04/09 08:47:21	1.1.1.4
+++ hatari/src/falcon/videl.c	2019/04/09 08:48:46	1.1.1.5
@@ -40,7 +40,9 @@ const char VIDEL_fileid[] = "Hatari vide
 #define HW	0xff8200
 #define VIDEL_COLOR_REGS_BEGIN	0xff9800
 
-
+/* TODO: put these to some struct so that it's easier to see
+ * they're VIDEL global
+ */
 static int width, height, bpp, since_last_change;
 static bool hostColorsSync;
 
@@ -152,6 +154,60 @@ static int VIDEL_getScreenHeight(void)
 	return yres;
 }
 
+#if 0
+/* this is easier & more robustly done in hostscreen.c just by
+ * comparing requested screen width & height to each other.
+ */
+static void VIDEL_getMonitorScale(int *sx, int *sy)
+{
+	/* Videl video mode register bits and resulting desktop resolution:
+	 * 
+	 * quarter, half, interlace, double:   pixels: -> zoom:
+	 * rgb:
+	 *    0       0       0         0      320x200 -> 2 x 2
+	 *    0       0       1         0      320x400 -> 2 x 1
+	 *    0       1       0         0      640x200 -> 1 x 2 !
+	 *    0       1       1         0      640x400 -> 1 x 1
+	 * vga:
+	 *    0       0       0         1      (just double ?)
+	 *    0       0       1         1      (double & interlace ???)
+	 *    0       1       0         0      320x480 -> 2 x 1 !
+	 *    0       1       0         1      320x240 -> 2 x 2
+	 *    0       1       1         1      (double + interlace ???)
+	 *    1       0       0         0      640x480 -> 1 x 1
+	 *    1       0       0         1      640x240 -> 1 x 2
+	 */
+	int vmode = handleReadW(HW + 0xc2);
+
+	/* half pixel seems to have opposite meaning on
+	 * VGA and RGB monitor, so they need to handled separately
+	 */
+	if (handleRead(0xFF8006) & FALCON_MONITOR_VGA) {
+		if (vmode & 0x08) {  // quarter pixel
+			*sx = 1;
+		} else {
+			*sx = 2;
+		}
+		if (vmode & 0x01) {  // double line
+			*sy = 2;
+		} else {
+			*sy = 1;
+		}
+	} else {
+		if (vmode & 0x04) {  // half pixel
+			*sx = 1;
+		} else {
+			*sx = 2;
+		}
+		if (vmode & 0x02) {  // interlace used only on RGB?
+			*sy = 1;
+		} else {
+			*sy = 2;
+		}
+	}
+}
+#endif
+
 
 /** map the correct colortable into the correct pixel format
  */
@@ -238,7 +294,7 @@ bool VIDEL_renderScreen(void)
 	if (!HostScreen_renderBegin())
 		return false;
 
-	if (ConfigureParams.Screen.bZoomLowRes) {
+	if (nScreenZoomX * nScreenZoomY != 1) {
 		VIDEL_renderScreenZoom();
 	} else {
 		VIDEL_renderScreenNoZoom();