diff --git a/MiSTer.ini b/MiSTer.ini
index b2b03c7..4bd5eb0 100644
--- a/MiSTer.ini
+++ b/MiSTer.ini
@@ -1,7 +1,8 @@
 [MiSTer]
 key_menu_as_rgui=0     ; set to 1 to make the MENU key map to RGUI in Minimig (e.g. for Right Amiga)
 forced_scandoubler=0   ; set to 1 to run scandoubler on VGA output always (depends on core).
-ypbpr=0                ; set to 1 for YPbPr on VGA output.
+;ypbpr=0               ; set to 1 for YPbPr on VGA output. (obsolete. see vga_mode)
+vga_mode=rgb           ; supported modes: rgb, ypbpr, svideo, cvbs. rgb is default.
 composite_sync=0       ; set to 1 for composite sync on HSync signal of VGA output.
 vga_scaler=0           ; set to 1 to connect VGA to scaler output.
 hdmi_audio_96k=0       ; set to 1 for 96khz/16bit HDMI audio (48khz/16bit otherwise)
diff --git a/cfg.cpp b/cfg.cpp
index 7e4a40c..34ebdcf 100644
--- a/cfg.cpp
+++ b/cfg.cpp
@@ -33,7 +33,7 @@ typedef struct
 
 static const ini_var_t ini_vars[] =
 {
-	{ "YPBPR", (void*)(&(cfg.ypbpr)), UINT8, 0, 1 },
+	{ "YPBPR", (void*)(&(cfg.vga_mode_int)), UINT8, 0, 1 },
 	{ "COMPOSITE_SYNC", (void*)(&(cfg.csync)), UINT8, 0, 1 },
 	{ "FORCED_SCANDOUBLER", (void*)(&(cfg.forced_scandoubler)), UINT8, 0, 1 },
 	{ "VGA_SCALER", (void*)(&(cfg.vga_scaler)), UINT8, 0, 1 },
@@ -115,6 +115,7 @@ static const ini_var_t ini_vars[] =
 	{ "VIDEO_HUE", (void *)(&(cfg.video_hue)), UINT16, 0, 360},
 	{ "VIDEO_GAIN_OFFSET", (void *)(&(cfg.video_gain_offset)), STRING, 0, sizeof(cfg.video_gain_offset)},
 	{ "HDR", (void*)(&cfg.hdr), UINT8, 0, 2 },
+	{ "vga_mode", (void*)(&(cfg.vga_mode)), STRING, 0, sizeof(cfg.vga_mode) - 1 },
 };
 
 static const int nvars = (int)(sizeof(ini_vars) / sizeof(ini_var_t));
@@ -463,7 +464,13 @@ void cfg_parse()
 		ini_parse(altcfg(), video_get_core_mode_name(0));
 	}
 
-
+	if (strlen(cfg.vga_mode))
+	{
+		if (!strcasecmp(cfg.vga_mode, "rgb")) cfg.vga_mode_int = 0;
+		if (!strcasecmp(cfg.vga_mode, "ypbpr")) cfg.vga_mode_int = 1;
+		if (!strcasecmp(cfg.vga_mode, "svideo")) cfg.vga_mode_int = 2;
+		if (!strcasecmp(cfg.vga_mode, "cvbs")) cfg.vga_mode_int = 3;
+	}
 }
 
 bool cfg_has_video_sections()
diff --git a/cfg.h b/cfg.h
index 9a361dc..4bb4ea3 100644
--- a/cfg.h
+++ b/cfg.h
@@ -13,7 +13,6 @@ typedef struct {
 	uint8_t forced_scandoubler;
 	uint8_t key_menu_as_rgui;
 	uint8_t reset_combo;
-	uint8_t ypbpr;
 	uint8_t csync;
 	uint8_t vga_scaler;
 	uint8_t vga_sog;
@@ -87,6 +86,8 @@ typedef struct {
 	uint16_t video_hue;
 	char video_gain_offset[256];
 	uint8_t hdr;
+	char vga_mode[16];
+	char vga_mode_int;
 } cfg_t;
 
 extern cfg_t cfg;
diff --git a/user_io.cpp b/user_io.cpp
index 0a67451..4c24b54 100644
--- a/user_io.cpp
+++ b/user_io.cpp
@@ -2696,9 +2696,9 @@ void user_io_send_buttons(char force)
 	if (kbd_reset || kbd_reset_ovr) map |= BUTTON2;
 
 	if (cfg.vga_scaler) map |= CONF_VGA_SCALER;
-	if (cfg.vga_sog) map |= CONF_VGA_SOG;
+	if (cfg.vga_sog || cfg.vga_mode_int >= 2) map |= CONF_VGA_SOG;
 	if (cfg.csync) map |= CONF_CSYNC;
-	if (cfg.ypbpr) map |= CONF_YPBPR;
+	if (cfg.vga_mode_int == 1) map |= CONF_YPBPR;
 	if (cfg.forced_scandoubler) map |= CONF_FORCED_SCANDOUBLER;
 	if (cfg.hdmi_audio_96k) map |= CONF_AUDIO_96K;
 	if (cfg.dvi_mode == 1) map |= CONF_DVI;
diff --git a/user_io.h b/user_io.h
index 802348f..eb6f971 100644
--- a/user_io.h
+++ b/user_io.h
@@ -72,6 +72,7 @@
 #define UIO_SHADOWMASK  0x3E
 #define UIO_GET_RUMBLE  0x3F
 #define UIO_GET_FB_PAR  0x40
+#define UIO_SET_YC_PAR  0x41
 
 // codes as used by 8bit for file loading from OSD
 #define FIO_FILE_TX     0x53
diff --git a/video.cpp b/video.cpp
index ac33c3b..15fd199 100644
--- a/video.cpp
+++ b/video.cpp
@@ -1020,7 +1020,7 @@ void video_loadPreset(char *name, bool save)
 {
 	char *arg;
 	fileTextReader reader;
-	
+
 	bool scaler_dirty = false;
 	bool mask_dirty = false;
 	bool gamma_dirty = false;
@@ -1163,7 +1163,7 @@ static void hdmi_config_set_csc()
 
 	const float pi = float(M_PI);
 
-	int ypbpr = cfg.ypbpr && cfg.direct_video;
+	int ypbpr = (cfg.vga_mode_int == 1) && cfg.direct_video;
 
 	// out-of-scope defines, not used with ypbpr
 	int16_t csc_int16[12];
@@ -1371,7 +1371,7 @@ static void hdmi_config_set_csc()
 
 static void hdmi_config_init()
 {
-	int ypbpr = cfg.ypbpr && cfg.direct_video;
+	int ypbpr = (cfg.vga_mode_int == 1) && cfg.direct_video;
 
 	// address, value
 	uint8_t init_data[] = {
@@ -2400,7 +2400,7 @@ void video_init()
 	video_mode_load();
 
 	has_gamma = spi_uio_cmd(UIO_SET_GAMMA);
-	
+
 	video_cfg_init();
 
 	video_set_mode(&v_def, 0);
@@ -2431,6 +2431,7 @@ static bool get_video_info(bool force, VideoInfo *video_info)
 		video_info->vtime = spi_w(0) | (spi_w(0) << 16);
 		video_info->ptime = spi_w(0) | (spi_w(0) << 16);
 		video_info->vtimeh = spi_w(0) | (spi_w(0) << 16);
+		video_info->ctime = spi_w(0) | (spi_w(0) << 16);
 		video_info->interlaced = ( res & 0x100 ) != 0;
 		video_info->rotated = ( res & 0x200 ) != 0;
 	}
@@ -2523,8 +2524,11 @@ static void show_video_info(const VideoInfo *vi, const vmode_custom_t *vm)
 	float prate = vi->width * 100;
 	prate /= vi->ptime;
 
-	printf("\033[1;33mINFO: Video resolution: %u x %u%s, fHorz = %.1fKHz, fVert = %.1fHz, fPix = %.2fMHz\033[0m\n",
-		vi->width, vi->height, vi->interlaced ? "i" : "", hrate, vrate, prate);
+	float crate = vi->ctime * 100;
+	crate /= vi->ptime;
+
+	printf("\033[1;33mINFO: Video resolution: %u x %u%s, fHorz = %.1fKHz, fVert = %.1fHz, fPix = %.2fMHz, fVid = %.2fMHz\033[0m\n",
+		vi->width, vi->height, vi->interlaced ? "i" : "", hrate, vrate, prate, crate);
 	printf("\033[1;33mINFO: Frame time (100MHz counter): VGA = %d, HDMI = %d\033[0m\n", vi->vtime, vi->vtimeh);
 	printf("\033[1;33mINFO: AR = %d:%d, fb_en = %d, fb_width = %d, fb_height = %d\033[0m\n", vi->arx, vi->ary, vi->fb_en, vi->fb_width, vi->fb_height);
 	if (vi->vtimeh) api1_5 = 1;
@@ -2717,6 +2721,37 @@ bool video_mode_select(uint32_t vtime, vmode_custom_t* out_mode)
 	return adjustable;
 }
 
+static void set_yc_mode()
+{
+	if (cfg.vga_mode_int >= 2)
+	{
+		int pal = (!current_video_info.vtime || (100000000 / current_video_info.vtime) < 55);
+		double CLK_REF = pal ? 4.43361875f : 3.579545f;
+		double CLK_VIDEO = current_video_info.ctime * 100.f / current_video_info.ptime;
+
+		int64_t PHASE_INC = ((int64_t)((CLK_REF / CLK_VIDEO) * 1099511627776LL)) & 0xFFFFFFFFFFLL;
+
+		int COLORBURST_START = (int)(3.7f * (CLK_VIDEO / CLK_REF));
+		int COLORBURST_END = (int)(9.0f * (CLK_VIDEO / CLK_REF)) + COLORBURST_START;
+		int COLORBURST_RANGE = (COLORBURST_START << 10) | COLORBURST_END;
+
+		spi_uio_cmd_cont(UIO_SET_YC_PAR);
+		spi_w((pal ? 4 : 0) | ((cfg.vga_mode_int == 3) ? 3 : 1));
+		spi_w(PHASE_INC);
+		spi_w(PHASE_INC >> 16);
+		spi_w(PHASE_INC >> 32);
+		spi_w(COLORBURST_RANGE);
+		spi_w(COLORBURST_RANGE >> 16);
+		DisableIO();
+
+		printf("Send YC parameters: %s PHASE_INC=%lld, COLORBURST_START=%d, COLORBURST_END=%d\n", pal ? "PAL" : "NTSC", PHASE_INC, COLORBURST_START, COLORBURST_END);
+	}
+	else
+	{
+		spi_uio_cmd8(UIO_SET_YC_PAR, 0);
+	}
+}
+
 void video_mode_adjust()
 {
 	static bool force = false;
@@ -2728,8 +2763,8 @@ void video_mode_adjust()
 	if (vid_changed || force)
 	{
 		current_video_info = video_info;
-
 		show_video_info(&video_info, &v_cur);
+		set_yc_mode();
 	}
 	force = false;
 
diff --git a/video.h b/video.h
index 837ef20..e740acb 100644
--- a/video.h
+++ b/video.h
@@ -12,6 +12,7 @@ struct VideoInfo
 	uint32_t htime;
 	uint32_t vtime;
 	uint32_t ptime;
+	uint32_t ctime;
 	uint32_t vtimeh;
 	uint32_t arx;
 	uint32_t ary;