--
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--
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-- 1KB Character Generator ROM
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-- 1KB Character Generator ROM
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-- Using 2 x RAMB4_S8 Block RAMs.
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-- Using 2 x RAMB4_S8 Block RAMs.
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--
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--
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library IEEE;
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library IEEE;
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use IEEE.STD_LOGIC_1164.ALL;
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use IEEE.STD_LOGIC_1164.ALL;
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use IEEE.STD_LOGIC_ARITH.ALL;
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use IEEE.STD_LOGIC_ARITH.ALL;
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use IEEE.STD_LOGIC_UNSIGNED.ALL;
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use IEEE.STD_LOGIC_UNSIGNED.ALL;
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library unisim;
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library unisim;
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use unisim.vcomponents.all;
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use unisim.vcomponents.all;
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entity char_rom is
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entity char_rom is
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Port (
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Port (
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clk : in std_logic;
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clk : in std_logic;
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rst : in std_logic;
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rst : in std_logic;
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cs : in std_logic;
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cs : in std_logic;
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rw : in std_logic;
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rw : in std_logic;
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addr : in std_logic_vector (9 downto 0);
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addr : in std_logic_vector (9 downto 0);
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wdata : in std_logic_vector (7 downto 0);
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wdata : in std_logic_vector (7 downto 0);
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rdata : out std_logic_vector (7 downto 0)
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rdata : out std_logic_vector (7 downto 0)
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);
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);
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end char_rom;
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end char_rom;
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architecture rtl of char_rom is
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architecture rtl of char_rom is
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signal we : std_logic;
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signal we : std_logic;
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signal reset : std_logic;
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signal reset : std_logic;
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signal rdata0 : std_logic_vector (7 downto 0);
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signal rdata0 : std_logic_vector (7 downto 0);
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signal rdata1 : std_logic_vector (7 downto 0);
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signal rdata1 : std_logic_vector (7 downto 0);
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signal ena0 : std_logic;
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signal ena0 : std_logic;
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signal ena1 : std_logic;
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signal ena1 : std_logic;
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begin
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begin
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CH_ROM0 : RAMB4_S8
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CH_ROM0 : RAMB4_S8
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generic map (
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generic map (
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INIT_00 => x"000000FF0000001010101010101010003E1C7F7F3E1C08000000FF0000000000",
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INIT_00 => x"000000FF0000001010101010101010003E1C7F7F3E1C08000000FF0000000000",
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INIT_01 => x"202020202020200000FF0000000000000000000000FF000000000000FF000000",
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INIT_01 => x"202020202020200000FF0000000000000000000000FF000000000000FF000000",
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INIT_02 => x"0000E0100808080000000304080808080810E000000000040404040404040420",
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INIT_02 => x"0000E0100808080000000304080808080810E000000000040404040404040420",
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INIT_03 => x"808080808080FF80402010080402010102040810204080FF8080808080808000",
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INIT_03 => x"808080808080FF80402010080402010102040810204080FF8080808080808000",
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INIT_04 => x"081C3E7F7F7F3600FF000000000000003C7E7E7E7E3C0001010101010101FF80",
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INIT_04 => x"081C3E7F7F7F3600FF000000000000003C7E7E7E7E3C0001010101010101FF80",
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INIT_05 => x"3C424242423C0081422418182442810808040300000000404040404040404000",
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INIT_05 => x"3C424242423C0081422418182442810808040300000000404040404040404000",
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INIT_06 => x"0808FF0808080800081C3E7F3E1C0802020202020202020008082A772A1C0800",
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INIT_06 => x"0808FF0808080800081C3E7F3E1C0802020202020202020008082A772A1C0800",
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INIT_07 => x"03070F1F3F7FFF001414543E010000080808080808080850A050A050A050A008",
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INIT_07 => x"03070F1F3F7FFF001414543E010000080808080808080850A050A050A050A008",
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INIT_08 => x"24247E247E242400000000002424240008000008080808000000000000000000",
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INIT_08 => x"24247E247E242400000000002424240008000008080808000000000000000000",
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INIT_09 => x"00000000100804003A444A30484830004626100864620000083C0A1C281E0800",
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INIT_09 => x"00000000100804003A444A30484830004626100864620000083C0A1C281E0800",
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INIT_0A => x"0008083E08080000082A1C3E1C2A080020100808081020000408101010080400",
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INIT_0A => x"0008083E08080000082A1C3E1C2A080020100808081020000408101010080400",
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INIT_0B => x"402010080402000018180000000000000000007E000000100808000000000000",
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INIT_0B => x"402010080402000018180000000000000000007E000000100808000000000000",
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INIT_0C => x"3C42021C02423C007E40300C02423C003E080808281808003C42625A46423C00",
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INIT_0C => x"3C42021C02423C007E40300C02423C003E080808281808003C42625A46423C00",
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INIT_0D => x"1010100804427E003C42427C40201C003844020478407E0004047E24140C0400",
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INIT_0D => x"1010100804427E003C42427C40201C003844020478407E0004047E24140C0400",
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INIT_0E => x"080800000800000000080000080000003804023E42423C003C42423C42423C00",
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INIT_0E => x"080800000800000000080000080000003804023E42423C003C42423C42423C00",
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INIT_0F => x"1000100C02423C0070180C060C18700000007E007E0000000E18306030180E10"
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INIT_0F => x"1000100C02423C0070180C060C18700000007E007E0000000E18306030180E10"
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)
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)
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port map (
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port map (
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clk => clk,
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clk => clk,
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en => ena0,
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en => ena0,
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we => we,
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we => we,
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rst => reset,
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rst => reset,
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addr(8 downto 0) => addr(8 downto 0),
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addr(8 downto 0) => addr(8 downto 0),
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di(7 downto 0) => wdata(7 downto 0),
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di(7 downto 0) => wdata(7 downto 0),
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do(7 downto 0) => rdata0(7 downto 0)
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do(7 downto 0) => rdata0(7 downto 0)
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);
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);
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CH_ROM1 : RAMB4_S8
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CH_ROM1 : RAMB4_S8
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generic map (
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generic map (
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INIT_00 => x"001C22404040221C007C22223C22227C004242427E422418001E204C564A221C",
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INIT_00 => x"001C22404040221C007C22223C22227C004242427E422418001E204C564A221C",
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INIT_01 => x"001C22424E40221C004040407840407E007E40407840407E0078242222222478",
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INIT_01 => x"001C22424E40221C004040407840407E007E40407840407E0078242222222478",
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INIT_02 => x"0042444870484442003844040404040E001C08080808081C004242427E424242",
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INIT_02 => x"0042444870484442003844040404040E001C08080808081C004242427E424242",
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INIT_03 => x"0018244242422418004242464A526242004242425A5A6642007E404040404040",
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INIT_03 => x"0018244242422418004242464A526242004242425A5A6642007E404040404040",
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INIT_04 => x"003C42023C40423C004244487C42427C001A244A42422418004040407C42427C",
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INIT_04 => x"003C42023C40423C004244487C42427C001A244A42422418004040407C42427C",
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INIT_05 => x"0042665A5A4242420018182424424242003C424242424242000808080808083E",
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INIT_05 => x"0042665A5A4242420018182424424242003C424242424242000808080808083E",
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INIT_06 => x"003C20202020203C007E40201804027E000808081C2222220042422418244242",
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INIT_06 => x"003C20202020203C007E40201804027E000808081C2222220042422418244242",
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INIT_07 => x"0010207F20100000080808082A1C0800003C04040404043C006E70103C10100C",
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INIT_07 => x"0010207F20100000080808082A1C0800003C04040404043C006E70103C10100C",
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INIT_08 => x"003C4240423C0000005C6242625C4040003A443C04380000001E204C564A221C",
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INIT_08 => x"003C4240423C0000005C6242625C4040003A443C04380000001E204C564A221C",
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INIT_09 => x"3C023A46463A0000001010107C10120C003C407E423C0000003A4642463A0202",
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INIT_09 => x"3C023A46463A0000001010107C10120C003C407E423C0000003A4642463A0202",
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INIT_0A => x"004468504844404038440404040C0004001C08080818000800424242625C4040",
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INIT_0A => x"004468504844404038440404040C0004001C08080818000800424242625C4040",
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INIT_0B => x"003C4242423C000000424242625C00000049494949760000001C080808080818",
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INIT_0B => x"003C4242423C000000424242625C00000049494949760000001C080808080818",
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INIT_0C => x"007C023C403E000000404040625C000002023A46463A000040405C62625C0000",
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INIT_0C => x"007C023C403E000000404040625C000002023A46463A000040405C62625C0000",
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INIT_0D => x"00364949494100000018244242420000003A464242420000000C1210107C1010",
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INIT_0D => x"00364949494100000018244242420000003A464242420000000C1210107C1010",
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INIT_0E => x"003C20202020203C007E2018047E00003C023A46424200000042241824420000",
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INIT_0E => x"003C20202020203C007E2018047E00003C023A46424200000042241824420000",
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INIT_0F => x"0010207F20100000080808082A1C0800003C04040404043C006E70103C10100C"
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INIT_0F => x"0010207F20100000080808082A1C0800003C04040404043C006E70103C10100C"
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)
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)
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port map (
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port map (
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clk => clk,
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clk => clk,
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en => ena1,
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en => ena1,
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we => we,
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we => we,
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rst => reset,
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rst => reset,
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addr(8 downto 0) => addr(8 downto 0),
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addr(8 downto 0) => addr(8 downto 0),
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di(7 downto 0) => wdata(7 downto 0),
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di(7 downto 0) => wdata(7 downto 0),
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do(7 downto 0) => rdata1(7 downto 0)
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do(7 downto 0) => rdata1(7 downto 0)
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);
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);
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my_chargen : process ( clk, rst, cs, rw, rdata0, rdata1 )
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my_chargen : process ( clk, rst, cs, rw, rdata0, rdata1 )
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begin
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begin
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case addr(9) is
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case addr(9) is
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when '0' =>
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when '0' =>
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ena0 <= cs;
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ena0 <= cs;
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ena1 <= '0';
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ena1 <= '0';
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rdata <= rdata0;
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rdata <= rdata0;
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when '1' =>
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when '1' =>
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ena0 <= '0';
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ena0 <= '0';
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ena1 <= cs;
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ena1 <= cs;
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rdata <= rdata1;
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rdata <= rdata1;
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when others =>
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when others =>
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null;
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null;
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end case;
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end case;
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we <= not rw;
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we <= not rw;
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reset <= rst;
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reset <= rst;
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end process;
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end process;
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end;
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end;
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