mirror of
https://github.com/ekeeke/Genesis-Plus-GX.git
synced 2024-11-05 02:15:07 +01:00
5b888e725b
improved cartridge structure added Lock-ON hardware emulation (Sonic & Knuckles) added cartridge ROM mirroring support (required for Lock-ON emulation)
45 lines
1.6 KiB
C
45 lines
1.6 KiB
C
/***************************************************************************************
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* Genesis Plus
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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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* Eke-Eke (2007,2008,2009), additional code & fixes for the GCN/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 _GEN_IO_H_
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#define _GEN_IO_H_
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#define REGION_JAPAN_NTSC 0x00
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#define REGION_JAPAN_PAL 0x40
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#define REGION_USA 0x80
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#define REGION_EUROPE 0xC0
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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 int old_system[2];
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/* Function prototypes */
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extern void io_init(void);
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extern void io_reset(void);
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extern void io_write(uint32 offset, uint32 value);
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extern uint32 io_read(uint32 offset);
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#endif /* _IO_H_ */
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