mirror of
https://github.com/ekeeke/Genesis-Plus-GX.git
synced 2024-11-09 04:15:14 +01:00
28775cc3aa
---------- * added Mega CD / Sega CD hardware emulation (incl. Sub 68K, CDD, CDC, PCM, GFX rotation/scaling, etc) * added .ISO & .BIN CD image file support * added 512K backup cartridge RAM support * added savestate support for CD games NOTES: ~~~~~~ * to play CD games, original BIOS ROM files are required in /genplus/bios/ directory: unzip & rename them to bios_CD_U.bin, bios_CD_E.bin, bios_CD_J.bin * CD audio tracks (CD-DA) are not supported (yet) [Core/CPU] ---------- * modified 68k core for Mega CD / Sega CD support [Core/VDP] --------------- * improved DMA accuracy * added support for 8-bit VRAM writes with undocumented code value (verified on real hardware by Nemesis) [Gamecube/Wii] --------------- * modified Master System & Game Gear "BIOS" support (files should be named bios_U.sms, bios_J.sms, bios_E.sms & bios.gg and copied to /genplus/bios directory). * replaced "Hard Reset" button by a Soft Reset for systems having a Reset button (Mega Drive / Genesis & Master System) * State & SRAM files are now only compressed when saving to Gamecube Memory Cards * various fixes & cleanup. [Core/SCD] ---------- * added Mega CD / Sega CD hardware emulation (incl. Sub 68K, CDD, CDC, PCM, GFX rotation/scaling, etc) * added .ISO & .BIN CD image file support * added 512K backup cartridge RAM support * added savestate support for CD games NOTES: ~~~~~~ * to play CD games, original BIOS ROM files are required in /genplus/bios/ directory: unzip & rename them to bios_CD_U.bin, bios_CD_E.bin, bios_CD_J.bin * CD audio tracks (CD-DA) are not supported (yet) [Core/CPU] ---------- * modified 68k core for Mega CD / Sega CD support [Core/VDP] --------------- * improved DMA accuracy * added support for 8-bit VRAM writes with undocumented code value (verified on real hardware by Nemesis) [Gamecube/Wii] --------------- * modified Master System & Game Gear "BIOS" support (files should be named bios_U.sms, bios_J.sms, bios_E.sms & bios.gg and copied to /genplus/bios directory). * replaced "Hard Reset" button by a Soft Reset for systems having a Reset button (Mega Drive / Genesis & Master System) * State & SRAM files are now only compressed when saving to Gamecube Memory Cards * various fixes & cleanup.
91 lines
4.1 KiB
C
91 lines
4.1 KiB
C
/****************************************************************************
|
|
* Genesis Plus
|
|
* Mega Drive cartridge hardware support
|
|
*
|
|
* Copyright (C) 2007-2011 Eke-Eke (Genesis Plus GX)
|
|
*
|
|
* Most cartridge protections were initially documented by Haze
|
|
* (http://haze.mameworld.info/)
|
|
*
|
|
* Realtec mapper was documented by TascoDeluxe
|
|
*
|
|
* 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 _MD_CART_H_
|
|
#define _MD_CART_H_
|
|
|
|
#define cart ext.md_cart
|
|
|
|
/* Lock-On cartridge type */
|
|
#define TYPE_GG 0x01 /* Game Genie */
|
|
#define TYPE_AR 0x02 /* (Pro) Action Replay */
|
|
#define TYPE_SK 0x03 /* Sonic & Knuckles */
|
|
|
|
/* Special hardware (0x01 & 0x02 reserved for Master System 3-D glasses & Terebi Oekaki) */
|
|
#define HW_J_CART 0x04
|
|
#define HW_LOCK_ON 0x08
|
|
|
|
/* Cartridge extra hardware */
|
|
typedef struct
|
|
{
|
|
uint8 regs[4]; /* internal registers (R/W) */
|
|
uint32 mask[4]; /* registers address mask */
|
|
uint32 addr[4]; /* registers address */
|
|
uint16 realtec; /* realtec mapper */
|
|
uint16 bankshift; /* cartridge with bankshift mecanism reseted on software reset */
|
|
unsigned int (*time_r)(unsigned int address); /* !TIME signal ($a130xx) read handler */
|
|
void (*time_w)(unsigned int address, unsigned int data); /* !TIME signal ($a130xx) write handler */
|
|
unsigned int (*regs_r)(unsigned int address); /* cart hardware registers read handler */
|
|
void (*regs_w)(unsigned int address, unsigned int data); /* cart hardware registers write handler */
|
|
} cart_hw_t;
|
|
|
|
/* Cartridge type */
|
|
typedef struct
|
|
{
|
|
uint8 rom[MAXROMSIZE]; /* ROM area */
|
|
uint8 *base; /* ROM base (saved for OS/Cartridge ROM swap) */
|
|
uint32 romsize; /* ROM size */
|
|
uint32 mask; /* ROM mask */
|
|
uint8 special; /* Lock-On, J-Cart or SMS 3-D glasses hardware */
|
|
cart_hw_t hw; /* Extra mapping hardware */
|
|
} md_cart_t;
|
|
|
|
|
|
/* Function prototypes */
|
|
extern void md_cart_init(void);
|
|
extern void md_cart_reset(int hard_reset);
|
|
extern int md_cart_context_save(uint8 *state);
|
|
extern int md_cart_context_load(uint8 *state);
|
|
|
|
#endif
|