hardware.h

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#ifndef __HARDWARE_H__
#define __HARDWARE_H__

/*
 * "Copyright (c) 2012 by Fritz Sieker."
 *
 * Permission to use, copy, modify, and distribute this software and its
 * documentation for any purpose, without fee, and without written
 * agreement is hereby granted, provided that the above copyright notice
 * and the following two paragraphs appear in all copies of this software,
 * that the files COPYING and NO_WARRANTY are included verbatim with
 * any distribution, and that the contents of the file README are included
 * verbatim as part of a file named README with any distribution.
 *
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE TO ANY PARTY FOR DIRECT,
 * INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT
 * OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF THE AUTHOR
 * HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * THE AUTHOR SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS ON AN "AS IS"
 * BASIS, AND THE AUTHOR NO OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT,
 * UPDATES, ENHANCEMENTS, OR MODIFICATIONS."
 *
 */

#include "lc3.h"
#include "logic.h"

#ifndef HARDWARE_VAR
#define HARDWARE_VAR extern
#endif

HARDWARE_VAR LC3_WORD* lc3_BUS;

void hardware_reset (void);

void hardware_load_MAR (void);

void hardware_load_MDR (void);

void hardware_gate_MDR (void);

void hardware_gate_PC (void);

void hardware_set_PC (LC3_WORD addr);

void hardware_load_IR (void);

LC3_WORD hardware_get_IR(void);

void hardware_load_REG (int regNum);

LC3_WORD hardware_get_REG (int regNum); 
void hardware_memory_enable (int rw);

void hardware_set_mode (int mode);

int hardware_get_CC (void);

void hardware_set_CC (int val);

int hardware_step (instruction_t* inst);

#endif /* ifdef __HARDWARE_H__ */