mirror of
https://github.com/libretro/Genesis-Plus-GX.git
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83 lines
3.3 KiB
C
83 lines
3.3 KiB
C
/***************************************************************************************
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* Genesis Plus
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* Internal hardware & Bus controllers
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*
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* Support for SG-1000, Mark-III, Master System, Game Gear, Mega Drive & Mega CD hardware
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*
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* Copyright (C) 1998-2003 Charles Mac Donald (original code)
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* Copyright (C) 2007-2024 Eke-Eke (Genesis Plus GX)
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*
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* Redistribution and use of this code or any derivative works are permitted
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* provided that the following conditions are met:
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*
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* - Redistributions may not be sold, nor may they be used in a commercial
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* product or activity.
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*
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* - Redistributions that are modified from the original source must include the
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* complete source code, including the source code for all components used by a
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* binary built from the modified sources. However, as a special exception, the
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* source code distributed need not include anything that is normally distributed
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* (in either source or binary form) with the major components (compiler, kernel,
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* and so on) of the operating system on which the executable runs, unless that
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* component itself accompanies the executable.
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*
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* - Redistributions must reproduce the above copyright notice, this list of
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* conditions and the following disclaimer in the documentation and/or other
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* materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************************/
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#ifndef _GENESIS_H_
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#define _GENESIS_H_
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#include "md_cart.h"
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#include "sms_cart.h"
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#include "scd.h"
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/* External Hardware */
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typedef union
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{
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md_cart_t md_cart;
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cd_hw_t cd_hw;
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} external_t;
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/* Global variables */
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#ifdef USE_DYNAMIC_ALLOC
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extern external_t *ext;
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#else
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extern external_t ext;
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#endif
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extern uint8 boot_rom[0x800];
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extern uint8 work_ram[0x10000];
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extern uint8 zram[0x2000];
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extern uint32 zbank;
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extern uint8 zstate;
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extern uint8 pico_current;
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extern uint8_t cart_size;
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/* Function prototypes */
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extern void gen_init(void);
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extern void gen_reset(int hard_reset);
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extern void gen_tmss_w(unsigned int offset, unsigned int data);
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extern void gen_bankswitch_w(unsigned int data);
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extern unsigned int gen_bankswitch_r(void);
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extern void gen_zbusreq_w(unsigned int state, unsigned int cycles);
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extern void gen_zreset_w(unsigned int state, unsigned int cycles);
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extern void gen_zbank_w(unsigned int state);
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extern int z80_irq_callback(int param);
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#endif /* _GEN_H_ */
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