Subversion Repositories a-z80

// Use this file with Lattice toolset instead of data_pins.v

//

// This file is provided courtesy by JuanS

module data_pins(

    bus_db_pin_oe,

    bus_db_pin_re,

    ctl_bus_db_we,

    clk,

    ctl_bus_db_oe,

    D,

    db

);

input wire bus_db_pin_oe;

input wire bus_db_pin_re;

input wire ctl_bus_db_we;

input wire clk;

input wire ctl_bus_db_oe;

inout wire [7:0] D;

inout wire [7:0] db;

reg [7:0] dout;

always@(negedge clk)

begin

    if (ctl_bus_db_we | bus_db_pin_re)

    begin

        if (bus_db_pin_re)

        dout <= D;

    else if (ctl_bus_db_we)

        dout <= db;

    end

end

assign db = ctl_bus_db_oe ? dout : 8'hZ;

assign D = bus_db_pin_oe ? dout : 8'hZ;

endmodule