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[/] [open8_urisc/] [trunk/] [VHDL/] [Open8_pkg.vhd] - Diff between revs 220 and 223

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Rev 220 Rev 223
Line 74... Line 74... 
  constant EXT_GP6           : integer := 3;
 
  constant EXT_GP6           : integer := 3;
 
  constant EXT_GP7           : integer := 4;
 
  constant EXT_GP7           : integer := 4;
 
 
 
 
 
  constant OPEN8_NULLBUS     : DATA_TYPE := x"00";
 
  constant OPEN8_NULLBUS     : DATA_TYPE := x"00";
 
 
 
 
 
 
 
  type OPEN8_BUS_TYPE is record
 
 
 
    Address                  : ADDRESS_TYPE;
 
 
 
    Wr_En                    : std_logic;
 
 
 
    Wr_Data                  : DATA_TYPE;
 
 
 
    Rd_En                    : std_logic;
 
 
 
  end record;
 
 
 
 
 
  -- Component declaration
 
  -- Component declaration
 
  --  (assumes a 1K RAM at 0x0000 and ROM at the top of the memory map)
 
  --  (assumes a 1K RAM at 0x0000 and ROM at the top of the memory map)
 
  component o8_cpu is
 
  component o8_cpu is
 
  generic(
 
  generic(
 
    Program_Start_Addr       : ADDRESS_TYPE := x"8000";
 
    Program_Start_Addr       : ADDRESS_TYPE := x"8000";
Line 93... Line 100... 
    Reset_Level              : std_logic    := '0' );
 
    Reset_Level              : std_logic    := '0' );
 
  port(
 
  port(
 
    Clock                    : in  std_logic;
 
    Clock                    : in  std_logic;
 
    Reset                    : in  std_logic;
 
    Reset                    : in  std_logic;
 
    CPU_Halt                 : in  std_logic;
 
    CPU_Halt                 : in  std_logic;
 
    Interrupts               : in  INTERRUPT_BUNDLE;
 
 
 
    GP_Flags                 : out EXT_GP_FLAGS;
 
    GP_Flags                 : out EXT_GP_FLAGS;
 
    Address                  : out ADDRESS_TYPE;
 
    Open8_Bus                : out OPEN8_BUS_TYPE;
 
    Rd_Data                  : in  DATA_TYPE;
 
    Rd_Data                  : in  DATA_TYPE;
 
    Rd_Enable                : out std_logic;
 
    Interrupts               : in  INTERRUPT_BUNDLE
 
    Wr_Data                  : out DATA_TYPE;
 
  );
 
    Wr_Enable                : out std_logic );
 
 
 
  end component;
 
  end component;
 
 
 
 
 
  -- This function is used to calculate RAM parameters, but is generally
 
  -- This function is used to calculate RAM parameters, but is generally
 
  --  useful for making things more generic.
 
  --  useful for making things more generic.
 
  function ceil_log2 (x : in natural) return natural;
 
  function ceil_log2 (x : in natural) return natural;

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