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+library ieee;
+use ieee.std_logic_1164.all;
+use ieee.numeric_std.all;
+
+entity dpram1r is
+ port (raddr : natural range 0 to 3;
+ rbit : natural range 0 to 7;
+ rdat : out std_logic;
+ waddr : natural range 0 to 3;
+ wdat : std_logic_vector (7 downto 0);
+ clk : std_logic);
+end dpram1r;
+
+architecture behav of dpram1r is
+ type memtype is array (0 to 3) of std_logic_vector (7 downto 0);
+ signal mem : memtype;
+begin
+ process (clk)
+ begin
+ if rising_edge (clk) then
+ -- Not a memory: uses different widths.
+ rdat <= mem (raddr)(rbit);
+ mem (waddr) <= wdat;
+ end if;
+ end process;
+end behav;