Genesis-Plus-GX/source/mem68k.h

/***************************************************************************************
 *  Genesis Plus
 *  68k bus arbitration
 *
 *  Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003  Charles Mac Donald (original code)
 *  Eke-Eke (2007,2008,2009), additional code & fixes for the GCN/Wii port
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 ****************************************************************************************/

#ifndef _MEM68K_H_
#define _MEM68K_H_

/* unused areas */
extern unsigned int m68k_read_bus_8(unsigned int address);
extern unsigned int m68k_read_bus_16(unsigned int address);
extern void m68k_unused_8_w(unsigned int address, unsigned int data);
extern void m68k_unused_16_w(unsigned int address, unsigned int data);

/* illegal areas */
extern unsigned int m68k_lockup_r_8(unsigned int address);
extern unsigned int m68k_lockup_r_16(unsigned int address);
extern void m68k_lockup_w_8(unsigned int address, unsigned int data);
extern void m68k_lockup_w_16(unsigned int address, unsigned int data);

/* eeprom */
extern unsigned int eeprom_read_byte(unsigned int address);
extern unsigned int eeprom_read_word(unsigned int address);
extern void eeprom_write_byte(unsigned int address, unsigned int data);
extern void eeprom_write_word(unsigned int address, unsigned int data);

/* Z80 bus */
extern unsigned int z80_read_byte(unsigned int address);
extern unsigned int z80_read_word(unsigned int address);
extern void z80_write_byte(unsigned int address, unsigned int data);
extern void z80_write_word(unsigned int address, unsigned int data);

/* I/O & Control registers */
extern unsigned int ctrl_io_read_byte(unsigned int address);
extern unsigned int ctrl_io_read_word(unsigned int address);
extern void ctrl_io_write_byte(unsigned int address, unsigned int data);
extern void ctrl_io_write_word(unsigned int address, unsigned int data);

/* VDP */
extern unsigned int vdp_read_byte(unsigned int address);
extern unsigned int vdp_read_word(unsigned int address);
extern void vdp_write_byte(unsigned int address, unsigned int data);
extern void vdp_write_word(unsigned int address, unsigned int data);

/* PICO */
extern unsigned int pico_read_byte(unsigned int address);
extern unsigned int pico_read_word(unsigned int address);

#endif /* _MEM68K_H_ */