Genesis-Plus-GX/source/mem68k.h
2010-06-14 19:20:05 +00:00

68 lines
3.0 KiB
C

/***************************************************************************************
* 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_ */