diff --git a/cache_ram.vhdl b/cache_ram.vhdl
index 4db8e0a..8c8c495 100644
--- a/cache_ram.vhdl
+++ b/cache_ram.vhdl
@@ -5,21 +5,21 @@ use ieee.math_real.all;
 
 entity cache_ram is
     generic(
-	ROW_BITS : integer := 16;
-	WIDTH    : integer := 64;
-	TRACE    : boolean := false;
-	ADD_BUF  : boolean := false
-	);
+        ROW_BITS : integer := 16;
+        WIDTH    : integer := 64;
+        TRACE    : boolean := false;
+        ADD_BUF  : boolean := false
+        );
 
     port(
-	clk     : in  std_logic;
-	rd_en   : in  std_logic;
-	rd_addr : in  std_logic_vector(ROW_BITS - 1 downto 0);
-	rd_data : out std_logic_vector(WIDTH - 1 downto 0);
-	wr_sel  : in  std_logic_vector(WIDTH/8 - 1 downto 0);
-	wr_addr : in  std_logic_vector(ROW_BITS - 1 downto 0);
-	wr_data : in  std_logic_vector(WIDTH - 1 downto 0)
-	);
+        clk     : in  std_logic;
+        rd_en   : in  std_logic;
+        rd_addr : in  std_logic_vector(ROW_BITS - 1 downto 0);
+        rd_data : out std_logic_vector(WIDTH - 1 downto 0);
+        wr_sel  : in  std_logic_vector(WIDTH/8 - 1 downto 0);
+        wr_addr : in  std_logic_vector(ROW_BITS - 1 downto 0);
+        wr_data : in  std_logic_vector(WIDTH - 1 downto 0)
+        );
 
 end cache_ram;
 
@@ -35,13 +35,13 @@ architecture rtl of cache_ram is
 
 begin
     process(clk)
-	variable lbit : integer range 0 to WIDTH - 1;
-	variable mbit : integer range 0 to WIDTH - 1;
-	variable widx : integer range 0 to SIZE - 1;
-	constant sel0 : std_logic_vector(WIDTH/8 - 1 downto 0)
+        variable lbit : integer range 0 to WIDTH - 1;
+        variable mbit : integer range 0 to WIDTH - 1;
+        variable widx : integer range 0 to SIZE - 1;
+        constant sel0 : std_logic_vector(WIDTH/8 - 1 downto 0)
             := (others => '0');
     begin
-	if rising_edge(clk) then
+        if rising_edge(clk) then
             if TRACE then
                 if wr_sel /= sel0 then
                     report "write a:" & to_hstring(wr_addr) &
@@ -57,29 +57,29 @@ begin
                     ram(widx)(mbit downto lbit) <= wr_data(mbit downto lbit);
                 end if;
             end loop;
-	    if rd_en = '1' then
-		rd_data0 <= ram(to_integer(unsigned(rd_addr)));
-		if TRACE then
-		    report "read a:" & to_hstring(rd_addr) &
-			" dat:" & to_hstring(ram(to_integer(unsigned(rd_addr))));
-		end if;
-	    end if;
-	end if;
+            if rd_en = '1' then
+                rd_data0 <= ram(to_integer(unsigned(rd_addr)));
+                if TRACE then
+                    report "read a:" & to_hstring(rd_addr) &
+                        " dat:" & to_hstring(ram(to_integer(unsigned(rd_addr))));
+                end if;
+            end if;
+        end if;
     end process;
 
     buf: if ADD_BUF generate
     begin
-	process(clk)
-	begin
-	    if rising_edge(clk) then
-		rd_data <= rd_data0;
-	    end if;
-	end process;
+        process(clk)
+        begin
+            if rising_edge(clk) then
+                rd_data <= rd_data0;
+            end if;
+        end process;
     end generate;
 
     nobuf: if not ADD_BUF generate
     begin
-	rd_data <= rd_data0;
+        rd_data <= rd_data0;
     end generate;
 
 end;