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-------------------------------------------------------------------
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--!
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--! PDP-8 Processor
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--!
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--! \brief
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--! NEXYS2 Wrapper: Type Definitions
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--!
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--! \details
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--!
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--!
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--! \file
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--! nexys2_types.vhd
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--!
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--! \author
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--! Rob Doyle - doyle (at) cox (dot) net
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--!
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--------------------------------------------------------------------
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--
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-- Copyright (C) 2009, 2010, 2011, 2012 Rob Doyle
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--
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-- This source file may be used and distributed without
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-- restriction provided that this copyright statement is not
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-- removed from the file and that any derivative work contains
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-- the original copyright notice and the associated disclaimer.
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--
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-- This source file is free software; you can redistribute it
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-- and/or modify it under the terms of the GNU Lesser General
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-- Public License as published by the Free Software Foundation;
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-- version 2.1 of the License.
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--
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-- This source is distributed in the hope that it will be
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-- useful, but WITHOUT ANY WARRANTY; without even the implied
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-- warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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-- PURPOSE. See the GNU Lesser General Public License for more
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-- details.
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--
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-- You should have received a copy of the GNU Lesser General
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-- Public License along with this source; if not, download it
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-- from http://www.gnu.org/licenses/lgpl.txt
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--
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--------------------------------------------------------------------
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--
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-- Comments are formatted for doxygen
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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 ieee.numeric_std.all;
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use work.cpu_types.all;
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--
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--! NEXYS2 Type Definition Package
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--
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package nexys2_types is
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subtype dispSeg_t is std_logic_vector(0 to 7); --! Display Segment Driver
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subtype dispDig_t is std_logic_vector(0 to 3); --! Display Digit Drivers
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subtype dispDat_t is std_logic_vector(0 to 15); --! Display Data type
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subtype iodata_t is std_logic_vector(0 to 23); --! IO Bus
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subtype led_t is std_logic_vector(0 to 7); --! LEDs
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subtype btn_t is std_logic_vector(0 to 3); --! Push Buttons
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subtype sw_t is std_logic_vector(0 to 7); --! Switches
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function to_octal(indat : data_t) return dispDat_t;
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end nexys2_types;
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--
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--! NEXYS2 Type Definition Package Body
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--
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package body nexys2_types is
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--
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-- Function to convert data from octal to dispDat_t
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--
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function to_octal(indat : data_t) return dispDat_t is
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begin
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return '0' & indat(0 to 2) & '0' & indat(3 to 5) &
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'0' & indat(6 to 8) & '0' & indat(9 to 11);
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end to_octal;
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end package body;
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