Genesis-Plus-GX/core/membnk.h

61 lines
2.9 KiB
C

/***************************************************************************************
* Genesis Plus
* Z80 bank access to 68k bus
*
* Copyright (C) 1998-2003 Charles Mac Donald (original code)
* Copyright (C) 2007-2020 Eke-Eke (Genesis Plus GX)
*
* Redistribution and use of this code or any derivative works are permitted
* provided that the following conditions are met:
*
* - Redistributions may not be sold, nor may they be used in a commercial
* product or activity.
*
* - Redistributions that are modified from the original source must include the
* complete source code, including the source code for all components used by a
* binary built from the modified sources. However, as a special exception, the
* source code distributed need not include anything that is normally distributed
* (in either source or binary form) with the major components (compiler, kernel,
* and so on) of the operating system on which the executable runs, unless that
* component itself accompanies the executable.
*
* - Redistributions must reproduce the above copyright notice, this list of
* conditions and the following disclaimer in the documentation and/or other
* materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************************/
#ifndef _MEMBNK_H_
#define _MEMBNK_H_
extern unsigned int zbank_unused_r(unsigned int address);
extern void zbank_unused_w(unsigned int address, unsigned int data);
extern unsigned int zbank_lockup_r(unsigned int address);
extern void zbank_lockup_w(unsigned int address, unsigned int data);
extern unsigned int zbank_read_ctrl_io(unsigned int address);
extern void zbank_write_ctrl_io(unsigned int address, unsigned int data);
extern unsigned int zbank_read_vdp(unsigned int address);
extern void zbank_write_vdp(unsigned int address, unsigned int data);
typedef struct
{
unsigned int (*read)(unsigned int address);
void (*write)(unsigned int address, unsigned int data);
} t_zbank_memory_map;
extern t_zbank_memory_map zbank_memory_map[256];
#endif /* _MEMBNK_H_ */