zpu/hdl/example/zpu_config.vhd

   1 -- ZPU
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   3 -- Copyright 2004-2008 oharboe - Øyvind Harboe - oyvind.harboe@zylin.com
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  34
  35 library ieee;
  36 use ieee.std_logic_1164.all;
  37 use ieee.numeric_std.all;
  38
  39 package zpu_config is
  40         -- generate trace output
  41         constant        Generate_Trace          : boolean := true;
  42         constant        wordPower                       : integer := 5;
  43         -- during simulation, set this to '0' to get matching trace.txt
  44         constant        DontCareValue           : std_logic := '0';
  45         -- Clock frequency in MHz.
  46         constant        ZPU_Frequency           : std_logic_vector(7 downto 0) := x"64";
  47         -- This is the msb address bit. bytes=2^(maxAddrBitIncIO+1)
  48         constant        maxAddrBitIncIO         : integer := 27;
  49         constant        maxAddrBitBRAM          : integer := 16;
  50
  51         -- start byte address of stack.
  52         -- point to top of RAM - 2*words
  53         constant        spStart                         : std_logic_vector(maxAddrBitIncIO downto 0) :=
  54                                         std_logic_vector(to_unsigned((2**(maxAddrBitBRAM+1))-8, maxAddrBitIncIO+1));
  55 end zpu_config;