/* top.v - Implements FPGA and Board specific circuitry

   This file is part of the 9086 project.

   Copyright (c) 2023 Efthymios Kritikos

   This program 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.

   This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.  */

`include "error_header.v"

module fpga_top(
	input clk48,

	input user_button;
	output reset_n;

	output reg rgb_led0_r;
	output reg rgb_led0_g;
	output reg rgb_led0_b;
);

wire HALT,[`ERROR_BITS-1:0]ERROR;
system system(
	/*     MISC    */ clk48,user_button,HALT,ERROR
	/* MEMORY / IO */ ,address_bus,data_bus,rd,wr,BHE,IOMEM
)

always @(HALT or ERROR or user_button) begin
	if (HALT==0) begin
		/* yellow */
		rgb_led_r=0;
		rgb_led_g=0;
		rgb_led_b=1;
	end else if (ERROR != `ERROR_BITS'b0) begin
		/* red */
		rgb_led_r=0;
		rgb_led_g=1;
		rgb_led_b=1;
	end else begin
		rgb_led_r=1;
		rgb_led_g=0;
		rgb_led_b=1;
	end
end