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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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--! RK05 Disk Simulation Type Definitions
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--!
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--! \details
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--! This package contains all the type information that is
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--! required to use the RK05 Disk Drive simulator package.
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--!
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--! \file
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--! rk05_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) 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.sd_types.all;
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use work.cpu_types.all;
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--
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--! RK05 Disk Simulation Type Definitions Package
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--
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package rk05_types is
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subtype rk05CYL_t is std_logic_vector(0 to 7); --! RK05 Cylinder Number
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subtype rk05SECT_t is std_logic_vector(0 to 3); --! RK05 Sector Number
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subtype rk05HEAD_t is std_logic; --! RK05 Head Number
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subtype rk05DRIVE_t is std_logic_vector(0 to 1); --! RK05 Drive Number
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subtype rk05WRINH_t is std_logic; --! Write Inhibit
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subtype rk05MNT_t is std_logic; --! Mounted
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subtype rk05LEN_t is std_logic; --! 128/256 word access
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subtype rk05RECAL_t is std_logic; --! Recalibrate
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subtype rk05drvNUM_t is integer range -1 to 3; --! Drive Array Index
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constant DRIVE0 : rk05drvNUM_t := 0; --! Drive 0 Index
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constant DRIVE1 : rk05drvNUM_t := 1; --! Drive 1 Index
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constant DRIVE2 : rk05drvNUM_t := 2; --! Drive 2 Index
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constant DRIVE3 : rk05drvNUM_t := 3; --! Drive 3 Index
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constant DRIVENULL : rk05drvNUM_t := -1; --! Drive 4 (not valid)
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--!
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--! RK05 Op
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--!
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type rk05OP_t is (rk05opNOP,
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rk05opCLR,
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rk05opRECAL,
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rk05opSEEK,
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rk05opWRPROT,
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rk05opREAD,
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rk05opWRITE);
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--!
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--! RK05 State
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--!
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type rk05STATE_t is (rk05stIDLE,
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rk05stBUSY,
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rk05stDONE);
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--!
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--! RK05 Status
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--!
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type rk05STAT_t is record
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active : std_logic; --! Disk Activity (one-shot)
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state : rk05STATE_t; --! Controller State
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mounted : rk05MNT_t; --! Mounted
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recal : rk05RECAL_t; --! Recalibrate
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wrinh : rk05WRINH_t; --! Write Inhibit
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sdOP : sdOP_t; --! OP
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sdLEN : sdLEN_t; --! 128/256 word access
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sdMEMaddr : addr_t; --! Memory Address
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sdDISKaddr : sdDISKaddr_t; --! Linear Disk Address
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end record;
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--!
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--! Disk Array Types
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--!
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type rk05OP_tt is array(0 to 3) of rk05OP_t; --! Array of RK05 OPs
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type rk05STAT_tt is array(0 to 3) of rk05STAT_t; --! Array of RK05 Status
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end rk05_types;
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