Top secrets sources NedoPC pentevo

// ZX-Evo Base Configuration (c) NedoPC 2008,2009,2010,2011,2012,2013,2014
//
// mux out VGA and TV signals and make final v|h syncs, DAC data, etc.

/*
    This file is part of ZX-Evo Base Configuration firmware.

    ZX-Evo Base Configuration firmware is free software:
    you can redistribute it and/or modify it under the terms of
    the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    ZX-Evo Base Configuration firmware is distributed in the hope that
    it will be useful, but WITHOUT ANY WARRANTY; without even
    the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
    See the GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with ZX-Evo Base Configuration firmware.
    If not, see <http://www.gnu.org/licenses/>.
*/

`include "../include/tune.v"

module video_outmux(

        input  wire        clk,


        input  wire        vga_on,


        input  wire [ 5:0] tvcolor,
        input  wire [ 5:0] vgacolor,

        input  wire        vga_hsync,
        input  wire        hsync,
        input  wire        vsync,


        output reg  [ 1:0] vred,
        output reg  [ 1:0] vgrn,
        output reg  [ 1:0] vblu,

        output reg         vhsync,
        output reg         vvsync,
        output reg         vcsync
);


        always @(posedge clk)
        begin
                vgrn[1:0] <= vga_on ? vgacolor[5:4] : tvcolor[5:4];
                vred[1:0] <= vga_on ? vgacolor[3:2] : tvcolor[3:2];
                vblu[1:0] <= vga_on ? vgacolor[1:0] : tvcolor[1:0];

                vhsync <= vga_on ? vga_hsync : hsync;
                vvsync <= vsync;

                vcsync <= ~(hsync ^ vsync);
        end



endmodule