/*****************************************************************************/
/*                                                                           */
/*				   memory.h				     */
/*                                                                           */
/*		    Memory subsystem for the 6502 simulator		     */
/*                                                                           */
/*                                                                           */
/*                                                                           */
/* (C) 2002-2003 Ullrich von Bassewitz                                       */
/*               Römerstrasse 52                                             */
/*               D-70794 Filderstadt                                         */
/* EMail:        uz@cc65.org                                                 */
/*                                                                           */
/*                                                                           */
/* This software is provided 'as-is', without any expressed or implied       */
/* warranty.  In no event will the authors be held liable for any damages    */
/* arising from the use of this software.                                    */
/*                                                                           */
/* Permission is granted to anyone to use this software for any purpose,     */
/* including commercial applications, and to alter it and redistribute it    */
/* freely, subject to the following restrictions:                            */
/*                                                                           */
/* 1. The origin of this software must not be misrepresented; you must not   */
/*    claim that you wrote the original software. If you use this software   */
/*    in a product, an acknowledgment in the product documentation would be  */
/*    appreciated but is not required.                                       */
/* 2. Altered source versions must be plainly marked as such, and must not   */
/*    be misrepresented as being the original software.                      */
/* 3. This notice may not be removed or altered from any source              */
/*    distribution.                                                          */
/*                                                                           */
/*****************************************************************************/



#ifndef MEMORY_H
#define MEMORY_H



/*****************************************************************************/
/*  		    		     Data				     */
/*****************************************************************************/



/* Forwards */
struct ChipInstance;

/* Memory size of the CPU */
extern unsigned MemSize;



/*****************************************************************************/
/*  	     	    	   	     Code				     */
/*****************************************************************************/



void MemWriteByte (unsigned Addr, unsigned char Val);
/* Write a byte to a memory location */

unsigned char MemReadByte (unsigned Addr);
/* Read a byte from a memory location */

unsigned MemReadWord (unsigned Addr);
/* Read a word from a memory location */

unsigned MemReadZPWord (unsigned char Addr);
/* Read a word from the zero page. This function differs from ReadMemW in that
 * the read will always be in the zero page, even in case of an address
 * overflow.
 */

void MemAssignChip (const struct ChipInstance* CI, unsigned Addr, unsigned Range);
/* Assign a chip instance to memory locations */

const struct ChipInstance* MemGetChip (unsigned Addr);
/* Get the chip that is located at the given address (may return NULL). */

void MemInit (void);
/* Initialize the memory subsystem */



/* End of memory.h */

#endif




