Genesis-Plus-GX/source/gen_io.h
ekeeke31 5b888e725b added proper IO initialization routines
improved cartridge structure
added Lock-ON hardware emulation (Sonic & Knuckles)
added cartridge ROM mirroring support (required for Lock-ON emulation)
2009-08-06 18:31:05 +00:00

45 lines
1.6 KiB
C

/***************************************************************************************
* Genesis Plus
* I/O Chip
*
* 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 _GEN_IO_H_
#define _GEN_IO_H_
#define REGION_JAPAN_NTSC 0x00
#define REGION_JAPAN_PAL 0x40
#define REGION_USA 0x80
#define REGION_EUROPE 0xC0
/* Global variables */
extern uint8 io_reg[0x10];
extern uint8 region_code;
extern int old_system[2];
/* Function prototypes */
extern void io_init(void);
extern void io_reset(void);
extern void io_write(uint32 offset, uint32 value);
extern uint32 io_read(uint32 offset);
#endif /* _IO_H_ */