Genesis-Plus-GX/core/genesis.h

82 lines
3.2 KiB
C

/***************************************************************************************
* Genesis Plus
* Internal hardware & Bus controllers
*
* Support for SG-1000, Mark-III, Master System, Game Gear, Mega Drive & Mega CD hardware
*
* Copyright (C) 1998-2003 Charles Mac Donald (original code)
* Copyright (C) 2007-2022 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 _GENESIS_H_
#define _GENESIS_H_
#include "md_cart.h"
#include "sms_cart.h"
#include "scd.h"
/* External Hardware */
typedef union
{
md_cart_t md_cart;
cd_hw_t cd_hw;
} external_t;
/* Global variables */
#ifdef USE_DYNAMIC_ALLOC
extern external_t *ext;
#else
extern external_t ext;
#endif
extern uint8 boot_rom[0x800];
extern uint8 work_ram[0x10000];
extern uint8 zram[0x2000];
extern uint32 zbank;
extern uint8 zstate;
extern uint8 pico_current;
/* Function prototypes */
extern void gen_init(void);
extern void gen_reset(int hard_reset);
extern void gen_tmss_w(unsigned int offset, unsigned int data);
extern void gen_bankswitch_w(unsigned int data);
extern unsigned int gen_bankswitch_r(void);
extern void gen_zbusreq_w(unsigned int state, unsigned int cycles);
extern void gen_zreset_w(unsigned int state, unsigned int cycles);
extern void gen_zbank_w(unsigned int state);
extern int z80_irq_callback(int param);
#endif /* _GEN_H_ */