2008-08-07 14:26:07 +02:00
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/***************************************************************************************
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* Genesis Plus 1.2a
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* I/O Chip
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*
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* Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003 Charles Mac Donald (original code)
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* modified by Eke-Eke (compatibility fixes & additional code), GC/Wii port
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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****************************************************************************************/
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#ifndef _IO_H_
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#define _IO_H_
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#define REGION_USA 0x80
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#define REGION_JAPAN_NTSC 0x00
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#define REGION_EUROPE 0xC0
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#define REGION_JAPAN_PAL 0x40
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/* Global variables */
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extern uint8 io_reg[0x10];
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extern uint8 region_code;
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extern uint8 pad_type;
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/* Function prototypes */
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extern void io_reset(void);
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extern void io_write(unsigned int offset, unsigned int value);
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extern unsigned int io_read(unsigned int offset);
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#endif /* _IO_H_ */
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