Subversion Repositories System09

--===========================================================================--

--                                                                           --

--    Synthesizable Character Generator using Xilinx RAMB16_S9 Block RAM     --

--                                                                           --

--===========================================================================--

--

--  File name      : char_rom2k_b16.vhd

--

--  Entity name    : char_rom

--

--  Purpose        : Implements a character generator ROM

--                   using one Xilinx RAMB16_S9 Block RAM

--                   Used by vdu8.vhd in the System09 SoC

--

--  Dependencies   : ieee.std_logic_1164

--                   ieee.std_logic_arith

--

--  Uses           : RAMB16_S9 (Xilinx 16KBit Block RAM)

--

--  Author         : John E. Kent

--

--  Email          : dilbert57@opencores.org      

--

--  Web            : http://opencores.org/project,system09

--

--  Description    : Characters are 7 pixels x 11 rows x 128 characters

--                   Stored as 8 bits x 16 locations x 128 characters

--

--  Copyright (C) 2003 - 2010 John Kent

--

--  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/>.

--

--===========================================================================--

--                                                                           --

--                              Revision  History                            --

--                                                                           --

--===========================================================================--

--

-- Version Date        Author     Changes

--

-- 0.1     2004-10-18  John Kent  Initial relaease

--

-- 0.2     2010-06-17  John Kent  Updated header and description and added GPL

--     

library IEEE;

use IEEE.STD_LOGIC_1164.ALL;

use IEEE.STD_LOGIC_ARITH.ALL;

library unisim;

        use unisim.vcomponents.all;

entity char_rom is

    Port (

       clk      : in  std_logic;

       rst      : in  std_logic;

       cs       : in  std_logic;

       addr     : in  std_logic_vector (10 downto 0);

       rw       : in  std_logic;

       data_in  : in  std_logic_vector (7 downto 0);

       data_out : out std_logic_vector (7 downto 0)

    );

end char_rom;

architecture rtl of char_rom is

signal we : std_logic;

signal dp : std_logic;

begin

  ROM : RAMB16_S9

    generic map (

    INIT_00 => x"0000000009090F09090038043840380000000000070404040400444C54644400",

    INIT_01 => x"00000000110A040A110078407040780000000000110A040A1100380438403800",

    INIT_02 => x"000000000D1215110E0078407040780000000000040404041F00784070407800",

    INIT_03 => x"000000000F080808080070487048700000000000090A0C0A0900487848483000",

    INIT_04 => x"00000000040404041F0044447C444400000000000E010E100E00704870487000",

    INIT_05 => x"00000000040404041F001028444444000000000010101E101F007C4040404000",

    INIT_06 => x"0000000011111E111E003C4040403C000000000008080E080F00404070407800",

    INIT_07 => x"00000000070202020700380438403800000000000E1111110E00380438403800",

    INIT_08 => x"00000000070202060200704848487000000000000F080E080F00704848487000",

    INIT_09 => x"000000000E0107020F00704848487000000000000F0806090700704848487000",

    INIT_0a => x"00000000090A0C0A0900444C546444000000000001010F090900704848487000",

    INIT_0b => x"000000000E090E090E0078407040780000000000111315191100380438403800",

    INIT_0c => x"000000001111151B110078407040780000000000111315191100384040403800",

    INIT_0d => x"000000000E1010100E00784070407800000000000E090E090E00380438403800",

    INIT_0e => x"000000000E010E100E00384858403800000000000E010E100E00404070407800",

    INIT_0f => x"000000000E010E100E00304848484800000000000E010E100E00485070487000",

    INIT_10 => x"0000000008080000080808080808080000000000000000000000000000000000",

    INIT_11 => x"000000002424247E2424247E2424240000000000000000000000001212121200",

    INIT_12 => x"0000000043434020100804020161610000000000083E4909093E4848493E0800",

    INIT_13 => x"00000000000000000000002010080C00000000003D4244444438444444443800",

    INIT_14 => x"0000000020100804040404040810200000000000020408101010101008040200",

    INIT_15 => x"0000000000000808087F0808080000000000000000004122147F142241000000",

    INIT_16 => x"0000000000000000007F00000000000000402010181800000000000000000000",

    INIT_17 => x"0000000040404020100804020101010000000000181800000000000000000000",

    INIT_18 => x"000000003E080808080808082818080000000000081422414141414122140800",

    INIT_19 => x"000000003E410101010E010101413E00000000007F4020100804020141423C00",

    INIT_1a => x"000000003E410101615E404040407F000000000002020202027F22120A060200",

    INIT_1b => x"00000000404020100804020101017F00000000001E214141615E404040211E00",

    INIT_1c => x"000000003C420101013D434141423C00000000003E414141413E414141413E00",

    INIT_1d => x"0000402010181818000000181818000000000000001818180000001818180000",

    INIT_1e => x"00000000000000007F00007F0000000000000000010204081020100804020100",

    INIT_1f => x"00000000080800080808060101413E0000000000402010080402040810204000",

    INIT_20 => x"0000000041414141417F414122140800000000001C224140404E494541221C00",

    INIT_21 => x"000000001E2141404040404041211E00000000007E212121213E212121217E00",

    INIT_22 => x"000000007F404040407C404040407F00000000007C2221212121212121227C00",

    INIT_23 => x"000000001E2141414147404040211E000000000040404040407C404040407F00",

    INIT_24 => x"000000003E0808080808080808083E000000000041414141417F414141414100",

    INIT_25 => x"00000000414244485060504844424100000000003C4202020202020202020700",

    INIT_26 => x"00000000414141414141494955634100000000007F4040404040404040404000",

    INIT_27 => x"000000003E4141414141414141413E0000000000414141434549495161414100",

    INIT_28 => x"000000003D4245494141414141413E000000000040404040407E414141417E00",

    INIT_29 => x"000000003E410101013E404040413E000000000041424448507E414141417E00",

    INIT_2a => x"000000003E414141414141414141410000000000080808080808080808087F00",

    INIT_2b => x"0000000022225555494941414141410000000000080814141422222241414100",

    INIT_2c => x"0000000008080808080814224141410000000000414141221408142241414100",

    INIT_2d => x"000000001E1010101010101010101E00000000007F4040201008040201017F00",

    INIT_2e => x"000000003C0404040404040404043C0000000000010101020408102040404000",

    INIT_2f => x"000000007F000000000000000000000000000000000000000000004122140800",

    INIT_30 => x"000000003F41413F01013E000000000000000000000000000000000204081800",

    INIT_31 => x"000000001E21404040211E0000000000000000005E61616141615E4040404000",

    INIT_32 => x"000000003E40407F41413E0000000000000000003D43414141433D0101010100",

    INIT_33 => x"003C4202023E424242423D0100000000000000001010101010107C1010110E00",

    INIT_34 => x"000000003E0808080808180000080800000000004141414141615E4040404000",

    INIT_35 => x"00000000414448704844414040404000003C4202020202020202020000020200",

    INIT_36 => x"00000000414141494955220000000000000000001C0808080808080808081800",

    INIT_37 => x"000000003E41414141413E0000000000000000004141414141615E0000000000",

    INIT_38 => x"00010101013D434343433D000000000000404040405E616161615E0000000000",

    INIT_39 => x"000000003E01013E40403E0000000000000000002020202020314E0000000000",

    INIT_3a => x"000000003D4242424242420000000000000000000C12101010107C1010101000",

    INIT_3b => x"0000000022554949414141000000000000000000081414222241410000000000",

    INIT_3c => x"003C4202023A4642424242000000000000000000412214081422410000000000",

    INIT_3d => x"00000000070808081020100808080700000000007F20100804027F0000000000",

    INIT_3e => x"0000000070080808040204080808700000000000080808080800080808080800",

    INIT_3f => x"0000000049224922492249224922490000000000000000000000000046493100"

    )

    port map (

          do    => data_out,

          dop(0)=> dp,

          addr  => addr,

          clk   => clk,

     di    => data_in,

          dip(0)=> dp,

          en    => cs,

          ssr   => rst,

          we    => we

        );

my_char_rom : process ( rw )

begin

         we    <= not rw;

end process;

end architecture rtl;