mirror of
https://github.com/ekeeke/Genesis-Plus-GX.git
synced 2024-11-05 02:15:07 +01:00
a4cfc2a77a
--------------- * improved VBLANK flag accuracy, as observed on real hardware. * improved DMA operations accuracy, writes are now performed on a scanline basis: fixes Gaiares (flickering title screen). * improved DMA Fill timing accuracy. * fixed DMA with bad code values: fixes Williams Arcade Classics (corrupted gfx after soft reset). * fixed horizontal resolution changes during HBLANK: fixes Bugs Bunny in Double Trouble (2nd stage). * fixed Vertical Counter in interlace mode 1, as observed on real hardware. * fixed horizontal border width, as observed on real hardware. * various code improvments & optimizations. [Core/Extra] --------------- * improved savestate format: added DMA, SVP, cartridge mapping & internal registers state informations * improved unlicensed ROM mappers emulation * added Chinese Fighters III mapper support * added Top Fighter mapper support * fixed Barver Battle Saga mapper support * fixed cartridge hardware soft-reset (Game Genie, SVP, ...) * fixed Game Genie registers byte reads
73 lines
2.9 KiB
C
73 lines
2.9 KiB
C
/****************************************************************************
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* Genesis Plus
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* Cartridge Hardware support
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*
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* Copyright (C) 2007, 2008, 2009, 2010 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 _CART_HW_H_
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#define _CART_HW_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 /* Action Replay (Pro) */
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#define TYPE_SK 0x03 /* Sonic & Knuckles */
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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 soft-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 data */
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uint8 *base; /* ROM base (slot 0) */
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uint32 romsize; /* ROM size */
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uint32 mask; /* ROM mask */
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uint8 lock_on; /* 1: Lock-On port */
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uint8 jcart; /* 1: J-CART port */
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T_CART_HW hw; /* Extra 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 cart_hw_init();
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extern void cart_hw_reset(int hard);
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extern int cart_hw_context_save(uint8 *state);
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extern int cart_hw_context_load(uint8 *state, char *version);
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#endif
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