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-- $Id: ib_sres_or_4.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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-- Module Name: ib_sres_or_4 - syn
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-- Description: ibus: result or, 4 input
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--
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-- Dependencies: -
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-- Test bench: tb/tb_pdp11_core (implicit)
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-- Target Devices: generic
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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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-- 2008-08-22 161 1.0.2 renamed pdp11_ibres_ -> ib_sres_; use iblib
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-- 2008-01-05 110 1.0.1 rename IB_MREQ(ena->req) SRES(sel->ack, hold->busy)
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-- 2007-12-29 107 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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use work.iblib.all;
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-- ----------------------------------------------------------------------------
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entity ib_sres_or_4 is -- ibus result or, 4 input
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port (
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IB_SRES_1 : in ib_sres_type; -- ib_sres input 1
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IB_SRES_2 : in ib_sres_type := ib_sres_init; -- ib_sres input 2
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IB_SRES_3 : in ib_sres_type := ib_sres_init; -- ib_sres input 3
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IB_SRES_4 : in ib_sres_type := ib_sres_init; -- ib_sres input 4
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IB_SRES_OR : out ib_sres_type -- ib_sres or'ed output
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);
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end ib_sres_or_4;
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architecture syn of ib_sres_or_4 is
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begin
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proc_comb : process (IB_SRES_1, IB_SRES_2, IB_SRES_3, IB_SRES_4)
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begin
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IB_SRES_OR.ack <= IB_SRES_1.ack or
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IB_SRES_2.ack or
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IB_SRES_3.ack or
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IB_SRES_4.ack;
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IB_SRES_OR.busy <= IB_SRES_1.busy or
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IB_SRES_2.busy or
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IB_SRES_3.busy or
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IB_SRES_4.busy;
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IB_SRES_OR.dout <= IB_SRES_1.dout or
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IB_SRES_2.dout or
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IB_SRES_3.dout or
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IB_SRES_4.dout;
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end process proc_comb;
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end syn;
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