diff --git a/MiSTer.ini b/MiSTer.ini
index 7a6ee1b..9aa80f4 100644
--- a/MiSTer.ini
+++ b/MiSTer.ini
@@ -14,6 +14,7 @@ vscale_mode=0          ; 0 - scale to fit the screen height.
 vscale_border=0        ; set vertical border for TVs cutting the upper/bottom parts of screen (1-99)
 ;bootscreen=0          ; uncomment to disable boot screen of some cores like Minimig. 
 ;mouse_throttle=10     ; 1-100 mouse speed divisor. Useful for very sensitive mouses
+rbf_hide_datecode=0    ; 1 - hides datecodes from rbf file names. Press F2 for quick temporary toggle
 
 ; USER button emulation by keybaord. Usually it's reset button.
 ; 0 - lctrl+lalt+ralt (lctrl+lgui+rgui on keyrah)
@@ -44,7 +45,8 @@ video_mode=0
 ; set to 1-10 (seconds) to display video info on startup/change
 video_info=0
 
-; set to 1 for automatic HDMI VSync rate adjust to match original VSync.
+; Set to 1 for automatic HDMI VSync rate adjust to match original VSync.
+; Set to 2 for low latency mode (single buffer).
 ; This option makes video butter smooth like on original emulated system.
 ; Adjusting is done by changing pixel clock. Not every display supports variable pixel clock.
 ; For proper adjusting and to reduce possible out of range pixel clock, use 60Hz HDMI video
diff --git a/cfg.cpp b/cfg.cpp
index aca8eca..14c73ef 100644
--- a/cfg.cpp
+++ b/cfg.cpp
@@ -33,7 +33,7 @@ const ini_var_t ini_vars[] = {
 	{ "KEY_MENU_AS_RGUI", (void*)(&(cfg.key_menu_as_rgui)), UINT8, 0, 1, 1 },
 	{ "VIDEO_MODE", (void*)(cfg.video_conf), STRING, 0, sizeof(cfg.video_conf)-1, 1 },
 	{ "VIDEO_INFO", (void*)(&(cfg.video_info)), UINT8, 0, 10, 1 },
-	{ "VSYNC_ADJUST", (void*)(&(cfg.vsync_adjust)), UINT8, 0, 1, 1 },
+	{ "VSYNC_ADJUST", (void*)(&(cfg.vsync_adjust)), UINT8, 0, 2, 1 },
 	{ "HDMI_AUDIO_96K", (void*)(&(cfg.hdmi_audio_96k)), UINT8, 0, 1, 1 },
 	{ "DVI_MODE", (void*)(&(cfg.dvi)), UINT8, 0, 1, 1 },
 	{ "KBD_NOMOUSE", (void*)(&(cfg.kbd_nomouse)), UINT8, 0, 1, 1 },
@@ -42,6 +42,7 @@ const ini_var_t ini_vars[] = {
 	{ "VOLUMECTL", (void*)(&(cfg.volumectl)), UINT8, 0, 1, 1 },
 	{ "VSCALE_MODE", (void*)(&(cfg.vscale_mode)), UINT8, 0, 3, 1 },
 	{ "VSCALE_BORDER", (void*)(&(cfg.vscale_border)), UINT8, 0, 100, 1 },
+	{ "RBF_HIDE_DATECODE", (void*)(&(cfg.rbf_hide_datecode)), UINT8, 0, 1, 1 },
 };
 
 // mist ini config
diff --git a/cfg.h b/cfg.h
index eab8d15..6776820 100644
--- a/cfg.h
+++ b/cfg.h
@@ -31,6 +31,7 @@ typedef struct {
 	uint8_t volumectl;
 	uint8_t vscale_mode;
 	uint8_t vscale_border;
+	uint8_t rbf_hide_datecode;
 	char video_conf[1024];
 } cfg_t;
 
diff --git a/menu.cpp b/menu.cpp
index fd9b946..30e28be 100644
--- a/menu.cpp
+++ b/menu.cpp
@@ -3550,6 +3550,9 @@ void PrintDirectory(void)
 				}
 			}
 
+			//not full check but should be enough.
+			if (cfg.rbf_hide_datecode && len > 9 && !strncmp(flist_DirItem(k)->d_name + len - 9, "_20", 3)) len -= 9;
+
 			if (len > 28)
 			{
 				len = 27; // trim display length if longer than 30 characters
diff --git a/releases/MiSTer_20181227 b/releases/MiSTer_20181227
new file mode 100644
index 0000000..8fd8963
Binary files /dev/null and b/releases/MiSTer_20181227 differ
diff --git a/user_io.cpp b/user_io.cpp
index 25fe8b0..afcb00f 100644
--- a/user_io.cpp
+++ b/user_io.cpp
@@ -2440,6 +2440,12 @@ void user_io_kbd(uint16_t key, int press)
 		if (press) setBrightness(BRIGHTNESS_UP, 0);
 	}
 	else
+	if (key == KEY_F2 && osd_is_visible)
+	{
+		if (press == 1) cfg.rbf_hide_datecode = !cfg.rbf_hide_datecode;
+		PrintDirectory();
+	}
+	else
 	if ((core_type == CORE_TYPE_MINIMIG2) ||
 		(core_type == CORE_TYPE_MIST) ||
 		(core_type == CORE_TYPE_ARCHIE) ||
@@ -2804,7 +2810,7 @@ static void setVideo()
 	for (int i = 9; i < 21; i++)
 	{
 		printf("0x%X, ", vitems[i]);
-		if (i & 1) spi_w(vitems[i]);
+		if (i & 1) spi_w(vitems[i] | ((i==9 && cfg.vsync_adjust==2) ? 0x8000 : 0));
 		else
 		{
 			spi_w(vitems[i]);
@@ -2898,7 +2904,7 @@ void parse_video_mode()
 
 static int adjust_video_mode(uint32_t vtime)
 {
-	printf("Adjust VSync.\n");
+	printf("Adjust VSync(%d).\n", cfg.vsync_adjust);
 
 	double Fpix = 100 * (vitems[1] + vitems[2] + vitems[3] + vitems[4]) * (vitems[5] + vitems[6] + vitems[7] + vitems[8]);
 	Fpix /= vtime;