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de0-zx-spectrum/cpu/control/ir.v
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2022-03-31 14:13:34 +03:00
// Copyright (C) 1991-2013 Altera Corporation
// Your use of Altera Corporation's design tools, logic functions
// and other software and tools, and its AMPP partner logic
// functions, and any output files from any of the foregoing
// (including device programming or simulation files), and any
// associated documentation or information are expressly subject
// to the terms and conditions of the Altera Program License
// Subscription Agreement, Altera MegaCore Function License
// Agreement, or other applicable license agreement, including,
// without limitation, that your use is for the sole purpose of
// programming logic devices manufactured by Altera and sold by
// Altera or its authorized distributors. Please refer to the
// applicable agreement for further details.
// PROGRAM "Quartus II 64-Bit"
// VERSION "Version 13.0.1 Build 232 06/12/2013 Service Pack 1 SJ Web Edition"
// CREATED "Sat Dec 10 08:56:46 2016"
module ir(
ctl_ir_we,
clk,
nreset,
nhold_clk_wait,
db,
opcode
);
input wire ctl_ir_we;
input wire clk;
input wire nreset;
input wire nhold_clk_wait;
input wire [7:0] db;
output reg [7:0] opcode;
wire SYNTHESIZED_WIRE_0;
assign SYNTHESIZED_WIRE_0 = ctl_ir_we & nhold_clk_wait;
always@(posedge clk or negedge nreset)
begin
if (!nreset)
begin
opcode[7:0] <= 8'b00000000;
end
else
if (SYNTHESIZED_WIRE_0)
begin
opcode[7:0] <= db[7:0];
end
end
endmodule