78 lines
3.7 KiB
C
78 lines
3.7 KiB
C
/***************************************************************************************
|
|
* Genesis Plus
|
|
* Main 68k bus handlers
|
|
*
|
|
* Copyright (C) 1998-2003 Charles Mac Donald (original code)
|
|
* Copyright (C) 2007-2024 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 _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);
|
|
|
|
/* 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_ */
|