The-Homebrew-Cloud/Genesis-Plus-GX
2
0
Fork 0
mirror of https://github.com/ekeeke/Genesis-Plus-GX.git synced 2024-11-14 06:45:09 +01:00
Code Issues Packages Projects Releases Wiki Activity
48b77511bf
Genesis-Plus-GX/source/gx/main.c
ekeeke31 79d5f55611 .added proper TMSS emulation 
.memory bus handlers code cleanup & optimization
2010-06-14 08:05:45 +00:00

386 lines
8.6 KiB
C
Raw Blame History

/****************************************************************************
* main.c
*
* Genesis Plus GX
*
* Softdev (2006)
* Eke-Eke (2007,2008,2009)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
***************************************************************************/
#include "shared.h"
#include "font.h"
#include "gui.h"
#include "aram.h"
#include "dvd.h"
#include "history.h"
#include "file_slot.h"
#include "file_fat.h"
#include "filesel.h"
#ifdef HW_RVL
#include "usb2storage.h"
#include "mload.h"
#endif
#include <fat.h>
#ifdef HW_RVL
#include <wiiuse/wpad.h>
#endif
u32 Shutdown = 0;
u32 ConfigRequested = 1;
#ifdef HW_RVL
/****************************************************************************
* Power Button callback
***************************************************************************/
static void Power_Off(void)
{
Shutdown = 1;
ConfigRequested = 1;
}
/****************************************************************************
* IOS support
***************************************************************************/
static bool FindIOS(u32 ios)
{
s32 ret;
u32 n;
u64 *titles = NULL;
u32 num_titles=0;
ret = ES_GetNumTitles(&num_titles);
if (ret < 0)
return false;
if(num_titles < 1)
return false;
titles = (u64 *)memalign(32, num_titles * sizeof(u64) + 32);
if (!titles)
return false;
ret = ES_GetTitles(titles, num_titles);
if (ret < 0)
{
free(titles);
return false;
}
for(n=0; n < num_titles; n++)
{
if((titles[n] & 0xFFFFFFFF)==ios)
{
free(titles);
return true;
}
}
free(titles);
return false;
}
#endif
/***************************************************************************
* Genesis Plus Virtual Machine
*
***************************************************************************/
static void load_bios(void)
{
/* reset BIOS flag */
config.tmss &= ~2;
/* open BIOS file */
FILE *fp = fopen(OS_ROM, "rb");
if (fp == NULL) return;
/* read file */
fread(bios_rom, 1, 0x800, fp);
fclose(fp);
/* update BIOS flags */
config.tmss |= 2;
}
static void init_machine(void)
{
/* Allocate cart_rom here ( 10 MBytes ) */
cart.rom = memalign(32, MAXROMSIZE);
if (!cart.rom)
{
FONT_writeCenter("Failed to allocate ROM buffer... Rebooting",18,0,640,200,(GXColor)WHITE);
gxSetScreen();
sleep(2);
gx_audio_Shutdown();
gx_video_Shutdown();
#ifdef HW_RVL
DI_Close();
SYS_ResetSystem(SYS_RESTART,0,0);
#else
SYS_ResetSystem(SYS_HOTRESET,0,0);
#endif
}
/* BIOS support */
load_bios();
/* allocate global work bitmap */
memset (&bitmap, 0, sizeof (bitmap));
bitmap.width = 720;
bitmap.height = 576;
bitmap.depth = 16;
bitmap.granularity = 2;
bitmap.pitch = bitmap.width * bitmap.granularity;
bitmap.viewport.w = 256;
bitmap.viewport.h = 224;
bitmap.viewport.x = 0;
bitmap.viewport.y = 0;
bitmap.data = texturemem;
}
static void run_emulation(void)
{
/* main emulation loop */
while (1)
{
/* Main Menu request */
if (ConfigRequested)
{
/* stop video & audio */
gx_audio_Stop();
gx_video_Stop();
/* show menu */
MainMenu ();
ConfigRequested = 0;
/* start video & audio */
gx_audio_Start();
gx_video_Start();
frameticker = 1;
}
/* automatic frame skipping */
if (frameticker > 1)
{
/* skip frame */
frameticker = 0;
system_frame(1);
}
else
{
/* render frame */
frameticker = 0;
system_frame(0);
/* update video */
gx_video_Update();
}
/* update audio */
gx_audio_Update();
/* wait for next frame */
while (frameticker < 1)
usleep(1);
}
}
/**************************************************
Load a new rom and performs some initialization
***************************************************/
void reloadrom (int size, char *name)
{
/* cartridge hot-swap support */
uint8 hotswap = 0;
if (cart.romsize)
hotswap = config.hot_swap;
/* Load ROM */
cart.romsize = size;
load_rom(name);
if (hotswap)
{
cart_hw_init();
cart_hw_reset();
}
else
{
/* initialize audio back-end */
/* 60hz video mode requires synchronization with Video Interrupt. */
/* VSYNC period is 16715 us on Wii/Gamecube (approx. 802.32 samples per frame) */
float framerate;
if (vdp_pal)
framerate = 50.0;
else
framerate = ((config.tv_mode == 0) || (config.tv_mode == 2)) ? (1000000.0/16715.0) : 60.0;
audio_init(48000, framerate);
/* System Power ON */
system_init ();
ClearGGCodes ();
system_reset ();
}
}
/**************************************************
Shutdown everything properly
***************************************************/
void shutdown(void)
{
/* system shutdown */
config_save();
if (config.s_auto & 2)
slot_autosave(config.s_default,config.s_device);
system_shutdown();
audio_shutdown();
free(cart.rom);
gx_audio_Shutdown();
gx_video_Shutdown();
#ifdef HW_RVL
DI_Close();
mload_close();
#endif
}
/***************************************************************************
* M A I N
*
***************************************************************************/
u32 fat_enabled = 0;
u32 frameticker = 0;
int main (int argc, char *argv[])
{
#ifdef HW_RVL
/* try to load IOS 202 */
if(IOS_GetVersion() != 202 && FindIOS(202))
IOS_ReloadIOS(202);
if(IOS_GetVersion() == 202)
{
/* disable DVDX stub */
DI_LoadDVDX(false);
/* load EHCI module & enable USB2 driver */
if(mload_init() >= 0 && load_ehci_module())
USB2Enable(true);
}
/* initialize DVD driver */
DI_Init();
#endif
/* initialize video engine */
gx_video_Init();
#ifdef HW_DOL
/* initialize DVD driver */
DVD_Init ();
dvd_drive_detect();
#endif
/* initialize FAT devices */
if (fatInitDefault())
{
/* base directory */
char pathname[MAXPATHLEN];
sprintf (pathname, DEFAULT_PATH);
DIR_ITER *dir = diropen(pathname);
if (dir)
dirclose(dir);
else
mkdir(pathname,S_IRWXU);
/* default SRAM & Savestate files directory */
sprintf (pathname, "%s/saves",DEFAULT_PATH);
dir = diropen(pathname);
if (dir)
dirclose(dir);
else
mkdir(pathname,S_IRWXU);
/* default Snapshot files directory */
sprintf (pathname, "%s/snaps",DEFAULT_PATH);
dir = diropen(pathname);
if (dir)
dirclose(dir);
else
mkdir(pathname,S_IRWXU);
}
/* initialize input engine */
gx_input_Init();
/* initialize sound engine (need libfat) */
gx_audio_Init();
/* initialize genesis plus core */
legal();
config_default();
history_default();
init_machine();
/* run any injected rom */
if (cart.romsize)
{
int size = cart.romsize;
cart.romsize = 0;
ARAMFetch((char *)cart.rom, (void *)0x8000, size);
reloadrom(size,"INJECT.bin");
ConfigRequested = 0;
gx_video_Start();
gx_audio_Start();
frameticker = 1;
}
else if (config.autoload)
{
SILENT = 1;
if (FAT_Open(TYPE_RECENT))
{
int size = FAT_LoadFile(cart.rom,0);
if (size)
{
reloadrom(size,filelist[0].filename);
if (config.s_auto & 1)
slot_autoload(0,config.s_device);
if (config.s_auto & 2)
slot_autoload(config.s_default,config.s_device);
gx_video_Start();
gx_audio_Start();
frameticker = 1;
ConfigRequested = 0;
}
}
SILENT = 0;
}
#ifdef HW_RVL
/* Power button callback */
SYS_SetPowerCallback(Power_Off);
#endif
/* main emulation loop */
run_emulation();
return 0;
}
Reference in New Issue View Git Blame Copy Permalink