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dimamali |
-----------------------------------------------------------------------------
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-- LEON3 Demonstration design test bench
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-- Copyright (C) 2004 Jiri Gaisler, Gaisler Research
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--
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-- This program is free software; you can redistribute it and/or modify
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-- it under the terms of the GNU General Public License as published by
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-- the Free Software Foundation; either version 2 of the License, or
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-- (at your option) any later version.
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--
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-- This program is distributed in the hope that it will be useful,
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-- but WITHOUT ANY WARRANTY; without even the implied warranty of
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-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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-- GNU General Public License for more details.
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------------------------------------------------------------------------------
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library ieee;
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use ieee.std_logic_1164.all;
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library gaisler;
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use gaisler.libdcom.all;
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use gaisler.sim.all;
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library techmap;
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use techmap.gencomp.all;
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library micron;
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use micron.components.all;
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use work.debug.all;
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use work.config.all; -- configuration
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entity testbench is
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generic (
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fabtech : integer := CFG_FABTECH;
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memtech : integer := CFG_MEMTECH;
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padtech : integer := CFG_PADTECH;
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clktech : integer := CFG_CLKTECH;
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ncpu : integer := CFG_NCPU;
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disas : integer := CFG_DISAS; -- Enable disassembly to console
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dbguart : integer := CFG_DUART; -- Print UART on console
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pclow : integer := CFG_PCLOW;
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clkperiod : integer := 10; -- system clock period
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romwidth : integer := 32; -- rom data width (8/32)
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romdepth : integer := 16; -- rom address depth
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sramwidth : integer := 32; -- ram data width (8/16/32)
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sramdepth : integer := 18; -- ram address depth
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srambanks : integer := 2 -- number of ram banks
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);
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end;
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architecture behav of testbench is
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constant promfile : string := "prom.srec"; -- rom contents
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constant sramfile : string := "sram.srec"; -- ram contents
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constant sdramfile : string := "sdram.srec"; -- sdram contents
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signal sys_clk : std_logic := '0';
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signal sys_rst_in : std_logic := '0'; -- Reset
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constant ct : integer := clkperiod/2;
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signal errorn : std_logic;
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signal address : std_logic_vector(27 downto 0);
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signal data : std_logic_vector(15 downto 0);
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signal xdata : std_logic_vector(31 downto 0);
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signal romsn : std_logic;
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signal iosn : std_ulogic;
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signal writen, read : std_ulogic;
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signal oen : std_ulogic;
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signal flash_rstn : std_logic;
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signal ddr_clk : std_logic_vector(2 downto 0);
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signal ddr_clkb : std_logic_vector(2 downto 0);
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signal ddr_clk_fb : std_logic;
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signal ddr_clk_fb_out : std_logic;
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signal ddr_cke : std_logic_vector(1 downto 0);
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signal ddr_csb : std_logic_vector(1 downto 0);
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signal ddr_web : std_ulogic; -- ddr write enable
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signal ddr_rasb : std_ulogic; -- ddr ras
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signal ddr_casb : std_ulogic; -- ddr cas
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signal ddr_dm : std_logic_vector (7 downto 0); -- ddr dm
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signal ddr_dqs : std_logic_vector (7 downto 0); -- ddr dqs
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signal ddr_ad : std_logic_vector (13 downto 0); -- ddr address
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signal ddr_ba : std_logic_vector (1 downto 0); -- ddr bank address
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signal ddr_dq : std_logic_vector (63 downto 0); -- ddr data
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signal txd1 : std_logic; -- UART1 tx data
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signal rxd1 : std_logic; -- UART1 rx data
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signal gpio : std_logic_vector(31 downto 0); -- I/O port
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signal flash_cex : std_logic;
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signal etx_clk, erx_clk, erx_dv, erx_er, erx_col, erx_crs, etx_en, etx_er : std_logic:='0';
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signal erxd, etxd: std_logic_vector(3 downto 0):=(others=>'0');
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signal emdc, emdio, eresetn : std_logic;
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signal etx_slew : std_logic_vector(1 downto 0);
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signal leds : std_logic_vector(1 downto 0);
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signal vid_clock : std_ulogic;
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signal vid_blankn : std_ulogic;
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signal vid_syncn : std_ulogic;
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signal vid_hsync : std_ulogic;
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signal vid_vsync : std_ulogic;
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signal vid_r : std_logic_vector(7 downto 0);
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signal vid_g : std_logic_vector(7 downto 0);
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signal vid_b : std_logic_vector(7 downto 0);
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signal ps2clk : std_logic_vector(1 downto 0);
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signal ps2data : std_logic_vector(1 downto 0);
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signal GND : std_ulogic := '0';
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signal VCC : std_ulogic := '1';
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signal NC : std_ulogic := 'Z';
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constant lresp : boolean := false;
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signal dsuen : std_ulogic;
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signal dsubre : std_ulogic;
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signal dsuact : std_ulogic;
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begin
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-- clock and reset
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sys_clk <= not sys_clk after ct * 1 ns;
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sys_rst_in <= '0', '1' after 200 ns;
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rxd1 <= 'H'; errorn <= 'H'; dsuen <= '0';
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ddr_clk_fb <= ddr_clk_fb_out; rxd1 <= txd1;
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cpu : entity work.leon3mp
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generic map ( fabtech, memtech, padtech, ncpu, disas, dbguart, pclow )
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port map ( sys_rst_in, sys_clk, errorn, dsuen, dsubre, dsuact,
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ddr_clk, ddr_clkb, ddr_clk_fb, ddr_clk_fb_out, ddr_cke, ddr_csb,
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ddr_web, ddr_rasb, ddr_casb, ddr_dm, ddr_dqs, ddr_ad, ddr_ba, ddr_dq,
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rxd1, txd1, leds(0), leds(1),
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-- gpio,
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emdio, etx_clk, erx_clk, erxd, erx_dv, erx_er, erx_col, erx_crs,
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etxd, etx_en, etx_er, emdc, eresetn, etx_slew, ps2clk, ps2data,
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vid_clock, vid_blankn, vid_syncn, vid_hsync, vid_vsync,
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vid_r, vid_g, vid_b
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);
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ddrmem : for i in 0 to 1 generate
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u3 : mt46v16m16
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generic map (index => 3, fname => sdramfile, bbits => 64)
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PORT MAP(
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Dq => ddr_dq(15 downto 0), Dqs => ddr_dqs(1 downto 0), Addr => ddr_ad(12 downto 0),
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Ba => ddr_ba, Clk => ddr_clk(i), Clk_n => ddr_clkb(i), Cke => ddr_cke(i),
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Cs_n => ddr_csb(i), Ras_n => ddr_rasb, Cas_n => ddr_casb, We_n => ddr_web,
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Dm => ddr_dm(1 downto 0));
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u2 : mt46v16m16
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generic map (index => 2, fname => sdramfile, bbits => 64)
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PORT MAP(
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Dq => ddr_dq(31 downto 16), Dqs => ddr_dqs(3 downto 2), Addr => ddr_ad(12 downto 0),
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Ba => ddr_ba, Clk => ddr_clk(i), Clk_n => ddr_clkb(i), Cke => ddr_cke(i),
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Cs_n => ddr_csb(i), Ras_n => ddr_rasb, Cas_n => ddr_casb, We_n => ddr_web,
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Dm => ddr_dm(3 downto 2));
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u1 : mt46v16m16
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generic map (index => 1, fname => sdramfile, bbits => 64)
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PORT MAP(
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Dq => ddr_dq(47 downto 32), Dqs => ddr_dqs(5 downto 4), Addr => ddr_ad(12 downto 0),
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Ba => ddr_ba, Clk => ddr_clk(i), Clk_n => ddr_clkb(i), Cke => ddr_cke(i),
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Cs_n => ddr_csb(i), Ras_n => ddr_rasb, Cas_n => ddr_casb, We_n => ddr_web,
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Dm => ddr_dm(5 downto 4));
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u0 : mt46v16m16
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generic map (index => 0, fname => sdramfile, bbits => 64)
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PORT MAP(
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Dq => ddr_dq(63 downto 48), Dqs => ddr_dqs(7 downto 6), Addr => ddr_ad(12 downto 0),
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Ba => ddr_ba, Clk => ddr_clk(i), Clk_n => ddr_clkb(i), Cke => ddr_cke(i),
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Cs_n => ddr_csb(i), Ras_n => ddr_rasb, Cas_n => ddr_casb, We_n => ddr_web,
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Dm => ddr_dm(7 downto 6));
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end generate;
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prom0 : sram16 generic map (index => 4, abits => romdepth, fname => promfile)
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port map (address(romdepth-1 downto 0), data,
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gnd, gnd, romsn, writen, oen);
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iuerr : process
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begin
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wait for 5000 ns;
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if to_x01(errorn) = '1' then wait on errorn; end if;
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assert (to_x01(errorn) = '1')
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report "*** IU in error mode, simulation halted ***"
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severity failure ;
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end process;
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xdata <= "0000000000000000" & data;
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test0 : grtestmod
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port map ( sys_rst_in, sys_clk, errorn, address(20 downto 1), xdata,
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iosn, oen, writen, open);
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data <= buskeep(data), (others => 'H') after 250 ns;
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ddr_dq <= buskeep(ddr_dq), (others => 'H') after 250 ns;
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end ;
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