2 * Copyright 2018 Jacob Lifshay
4 * Permission is hereby granted, free of charge, to any person obtaining a copy
5 * of this software and associated documentation files (the "Software"), to deal
6 * in the Software without restriction, including without limitation the rights
7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
8 * copies of the Software, and to permit persons to whom the Software is
9 * furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice shall be included in all
12 * copies or substantial portions of the Software.
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
23 `timescale 1ns / 100ps
33 output vga_pixel_clock,
41 wire [7:0] tty_write_data;
50 .vga_hsync(vga_hsync),
51 .vga_vsync(vga_vsync),
52 .vga_blank(vga_blank),
53 .vga_pixel_clock(vga_pixel_clock),
54 .tty_write(tty_write),
55 .tty_data(tty_write_data),
56 .tty_busy(tty_write_busy)
62 .tty_write(tty_write),
63 .tty_write_data(tty_write_data),
64 .tty_write_busy(tty_write_busy),
71 reg [31:0] reset_counter = 256;
74 if(reset_counter == 0)
77 reset_counter <= reset_counter - 1;