mirror of
https://github.com/ekeeke/Genesis-Plus-GX.git
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76 lines
3.0 KiB
C
76 lines
3.0 KiB
C
/****************************************************************************
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* Genesis Plus
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* Mega Drive cartridge hardware support
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*
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* Copyright (C) 2007-2011 Eke-Eke (GCN/Wii port)
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*
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* Lots of protection mechanism have been discovered by Haze
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* (http://haze.mameworld.info/)
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*
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* Realtec mapper has been figured out by TascoDeluxe
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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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#ifndef _MD_CART_H_
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#define _MD_CART_H_
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/* Lock-On cartridge type */
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#define TYPE_GG 0x01 /* Game Genie */
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#define TYPE_AR 0x02 /* (Pro) Action Replay */
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#define TYPE_SK 0x03 /* Sonic & Knuckles */
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/* Special hardware (0x01 reserved for SMS 3-D glasses) */
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#define HW_J_CART 0x02
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#define HW_LOCK_ON 0x04
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/* Cartridge extra hardware */
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typedef struct
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{
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uint8 regs[4]; /* internal registers (R/W) */
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uint32 mask[4]; /* registers address mask */
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uint32 addr[4]; /* registers address */
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uint16 realtec; /* realtec mapper */
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uint16 bankshift; /* cartridge with bankshift mecanism reseted on software reset */
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unsigned int (*time_r)(unsigned int address); /* !TIME signal ($a130xx) read handler */
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void (*time_w)(unsigned int address, unsigned int data); /* !TIME signal ($a130xx) write handler */
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unsigned int (*regs_r)(unsigned int address); /* cart hardware registers read handler */
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void (*regs_w)(unsigned int address, unsigned int data); /* cart hardware registers write handler */
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} T_CART_HW;
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/* Cartridge type */
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typedef struct
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{
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uint8 *rom; /* ROM area */
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uint8 *base; /* ROM base (saved for OS/Cartridge ROM swap) */
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uint32 romsize; /* ROM size */
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uint32 mask; /* ROM mask */
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uint8 special; /* Lock-On, J-Cart or SMS 3-D glasses hardware */
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T_CART_HW hw; /* Extra mapping hardware */
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} T_CART;
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/* global variables */
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extern T_CART cart;
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/* Function prototypes */
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extern void md_cart_init(void);
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extern void md_cart_reset(int hard_reset);
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extern int md_cart_context_save(uint8 *state);
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extern int md_cart_context_load(uint8 *state);
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#endif
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