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-- Copyright (C) 1996 Morgan Kaufmann Publishers, Inc
-- This file is part of VESTs (Vhdl tESTs).
-- VESTs is free software; you can redistribute it and/or modify it
-- under the terms of the GNU General Public License as published by the
-- Free Software Foundation; either version 2 of the License, or (at
-- your option) any later version.
-- VESTs is distributed in the hope that it will be useful, but WITHOUT
-- ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
-- FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
-- for more details.
-- You should have received a copy of the GNU General Public License
-- along with VESTs; if not, write to the Free Software Foundation,
-- Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
-- ---------------------------------------------------------------------
--
-- $Id: ch_20_fg_20_13.vhd,v 1.2 2001-10-26 16:29:36 paw Exp $
-- $Revision: 1.2 $
--
-- ---------------------------------------------------------------------
entity fg_20_13 is
end entity fg_20_13;
architecture test of fg_20_13 is
attribute trace : string;
subtype byte is bit_vector(7 downto 0);
type byte_vector is array (natural range <>) of byte;
type ram_bus is record
d : byte;
cmd, status, clk : bit;
end record ram_bus;
-- code from book
procedure mem_read ( address : in natural;
result : out byte_vector;
signal memory_bus : inout ram_bus ) is
attribute trace of address : constant is "integer/hex";
attribute trace of result : variable is "byte/multiple/hex";
attribute trace of memory_bus : signal is
"custom/command=rambus.cmd";
-- . . .
begin
-- . . .
-- not in book
report address'trace;
report result'trace;
report memory_bus'trace;
-- end not in book
end procedure mem_read;
-- end code from book
signal memory_bus : ram_bus;
begin
process is
variable address : natural;
variable result : byte_vector(0 to 3);
begin
mem_read ( address, result, memory_bus );
wait;
end process;
end architecture test;
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