Gehstock.Mist_FPGA/common/Video/VIDEO_OUT.v

module VIDEO_OUT
(
	pixel_clock,
	reset,
	vga_red_data,
	vga_green_data,
	vga_blue_data,
	h_synch,
	v_synch,
	blank,

	VGA_OUT_HSYNC,
	VGA_OUT_VSYNC,
	VGA_OUT_RED,
	VGA_OUT_GREEN,
	VGA_OUT_BLUE
);

input			pixel_clock;
input			reset;
input	[7:0]	vga_red_data;
input	[7:0]	vga_green_data;
input	[7:0]	vga_blue_data;
input			h_synch;
input			v_synch;
input			blank;

output			VGA_OUT_HSYNC;
output			VGA_OUT_VSYNC;
output	[7:0]	VGA_OUT_RED;
output	[7:0]	VGA_OUT_GREEN;
output	[7:0]	VGA_OUT_BLUE;

reg				VGA_OUT_HSYNC;
reg				VGA_OUT_VSYNC;
reg		[7:0]	VGA_OUT_RED;
reg		[7:0]	VGA_OUT_GREEN;
reg		[7:0]	VGA_OUT_BLUE;

// make the external video connections
always @ (posedge pixel_clock or posedge reset) begin
	if (reset) begin
		// shut down the video output during reset
		VGA_OUT_HSYNC 			<= 1'b1;
		VGA_OUT_VSYNC 			<= 1'b1;
		VGA_OUT_RED				<= 8'b0;
		VGA_OUT_GREEN			<= 8'b0;
		VGA_OUT_BLUE			<= 8'b0;
	end
	
	else if (blank) begin
		// output black during the blank signal
		VGA_OUT_HSYNC	 		<= h_synch;
		VGA_OUT_VSYNC 	 		<= v_synch;
		VGA_OUT_RED				<= 8'b0;
		VGA_OUT_GREEN			<= 8'b0;
		VGA_OUT_BLUE			<= 8'b0;
	end
	
	else begin
		// output color data otherwise
		VGA_OUT_HSYNC	 		<= h_synch;
		VGA_OUT_VSYNC 	 		<= v_synch;
		VGA_OUT_RED				<= vga_red_data;
		VGA_OUT_GREEN			<= vga_green_data;
		VGA_OUT_BLUE			<= vga_blue_data;
	end
end

endmodule // VIDEO_OUT