1 files changed, 0 insertions, 59 deletions
diff --git a/sw/cpld/address_decoder.vhd b/sw/cpld/address_decoder.vhd
deleted file mode 100755
index 5f32637..0000000
--- a/sw/cpld/address_decoder.vhd
+++ /dev/null
@@ -1,59 +0,0 @@
-library ieee;
-use ieee.std_logic_1164.all;
-use ieee.std_logic_arith.all;
-use ieee.std_logic_unsigned.all;
-
-entity ADDRESS_DECODER is
-port(
-	-- address input
-	MMU_IN: in std_logic_vector(15 downto 0);
-	-- address output
-	MMU_OUT: out std_logic_vector(15 downto 12);
-
-	-- other signals
-	IORQ: in std_logic;
-	RD:   in std_logic;
-
-	-- chip selects output
-	-- memory
-	CSROML: out std_logic;
-	CSROMH: out std_logic;
-	CSRAM : out std_logic;
-	-- io chips
-	CSUART: out std_logic;
-	CSCTC : out std_logic;
-	CSPIO : out std_logic
-);
-end;
-
-architecture Behavioral of ADDRESS_DECODER is
-	signal ADDR_IN_LOW  : unsigned (7 downto 0);
-	signal ADDR_IN_HIGH : unsigned (7 downto 0);
-	signal ADDR_IN      : unsigned (15 downto 0);
-begin
-	-- PAGE TABLE (disabled)
-	MMU_OUT <= MMU_IN(15 downto 12);	
-	
-	-- ENABLE SIGNALS
-	ADDR_IN_LOW  <= unsigned(MMU_IN(7 downto 0));
-	ADDR_IN_HIGH <= unsigned(MMU_IN(15 downto 8));
-	ADDR_IN      <= unsigned(MMU_IN);
-
-	-- io chips:
-	---- region 0x0000 - 0x00FF ----
-	
-	CSPIO <= '0' when ((ADDR_IN_LOW >= 16#10#) and (ADDR_IN_LOW < 16#14#) and (IORQ = '0')) else '1';
-	-- CSPIO  <= '0' when ((ADDR_IN >= 16#0010#) and (ADDR_IN < 16#0014#)) else '1';
-	-- CSCTC  <= '0' when ((ADDR_IN >= 16#4100#) and (ADDR_IN < 16#4200#)) else '1'; -- test address range
-	--CSUART <= '0' when ((ADDR_IN >= 16#4200#) and (ADDR_IN < 16#4300#)) else '1'; -- test address range
-
-	-- read only memory:
-	---- region 0x0000 - 0x4000 ----
-	CSROML <= '0' when ((ADDR_IN >= 16#0000#) and (ADDR_IN < 16#2000#)) else '1';
-	CSROMH <= '0' when ((ADDR_IN >= 16#2000#) and (ADDR_IN < 16#4000#)) else '1';
-
-	-- random access memory:
-	---- region 0x8000 - 0xFFFF ----
-	CSRAM  <= '0' when (ADDR_IN >= 16#8000#) else '1';
-end Behavioral;
-