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-- $Id: sys_conf.vhd 314 2010-07-09 17:38:41Z mueller $
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--
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-- Copyright 2007-2008 by Walter F.J. Mueller <W.F.J.Mueller@gsi.de>
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--
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-- This program is free software; you may redistribute and/or modify it under
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-- the terms of the GNU General Public License as published by the Free
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-- Software Foundation, either version 2, or at your option any later version.
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--
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-- This program is distributed in the hope that it will be useful, but
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-- WITHOUT ANY WARRANTY, without even the implied warranty of MERCHANTABILITY
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-- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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-- for complete details.
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--
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------------------------------------------------------------------------------
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-- Package Name: sys_conf
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-- Description: Default definitions for pdp11core (for simple test benches)
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--
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-- Dependencies: -
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-- Tool versions: xst 8.1, 8.2, 9.1, 9.2; ghdl 0.18-0.25
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-- Revision History:
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-- Date Rev Version Comment
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-- 2008-02-23 118 1.0 Initial version
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------------------------------------------------------------------------------
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library ieee;
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use ieee.std_logic_1164.all;
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use work.slvtypes.all;
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package sys_conf is
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constant sys_conf_bram_awidth : integer := 15; -- 32 kB BRAM
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constant sys_conf_mem_losize : integer := 8#000777#;-- 32 kByte
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-- constant sys_conf_bram_awidth : integer := 14; -- 16 kB BRAM
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-- constant sys_conf_mem_losize : integer := 8#000377#;-- 16 kByte
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end package sys_conf;
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-- Note: mem_losize holds 16 MSB of the PA of the addressable memory
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-- 2 211 111 111 110 000 000 000
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-- 1 098 765 432 109 876 543 210
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--
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-- 0 000 000 011 111 111 000 000 -> 00037777 --> 14bit --> 16 kByte
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-- 0 000 000 011 111 111 000 000 -> 00077777 --> 15bit --> 32 kByte
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-- 0 011 111 111 111 111 000 000 -> 03777777 --> 20bit --> 1 MByte
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-- 1 110 111 111 111 111 000 000 -> 16777777 --> 22bit --> 4 MByte
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-- upper 256 kB excluded for 11/70 UB
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