mirror of
https://github.com/ekeeke/Genesis-Plus-GX.git
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381 lines
8.5 KiB
C
381 lines
8.5 KiB
C
/****************************************************************************
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* main.c
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*
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* Genesis Plus GX
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*
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* Softdev (2006)
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* Eke-Eke (2007,2008,2009)
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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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***************************************************************************/
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#include "shared.h"
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#include "font.h"
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#include "gui.h"
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#include "aram.h"
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#include "dvd.h"
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#include "history.h"
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#include "file_slot.h"
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#include "file_fat.h"
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#include "filesel.h"
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#ifdef HW_RVL
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#include "usb2storage.h"
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#include "mload.h"
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#endif
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#include <fat.h>
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#ifdef HW_RVL
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#include <wiiuse/wpad.h>
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#endif
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u32 Shutdown = 0;
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u32 ConfigRequested = 1;
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#ifdef HW_RVL
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/****************************************************************************
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* Power Button callback
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***************************************************************************/
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static void Power_Off(void)
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{
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Shutdown = 1;
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ConfigRequested = 1;
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}
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/****************************************************************************
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* IOS support
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***************************************************************************/
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static bool FindIOS(u32 ios)
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{
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s32 ret;
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u32 n;
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u64 *titles = NULL;
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u32 num_titles=0;
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ret = ES_GetNumTitles(&num_titles);
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if (ret < 0)
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return false;
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if(num_titles < 1)
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return false;
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titles = (u64 *)memalign(32, num_titles * sizeof(u64) + 32);
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if (!titles)
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return false;
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ret = ES_GetTitles(titles, num_titles);
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if (ret < 0)
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{
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free(titles);
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return false;
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}
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for(n=0; n < num_titles; n++)
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{
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if((titles[n] & 0xFFFFFFFF)==ios)
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{
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free(titles);
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return true;
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}
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}
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free(titles);
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return false;
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}
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#endif
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/***************************************************************************
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* Genesis Plus Virtual Machine
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*
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***************************************************************************/
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static void load_bios(void)
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{
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/* reset BIOS found flag */
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config.bios_enabled &= ~2;
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/* open BIOS file */
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FILE *fp = fopen(OS_ROM, "rb");
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if (fp == NULL) return;
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/* read file */
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fread(bios_rom, 1, 0x800, fp);
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fclose(fp);
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/* update BIOS flags */
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config.bios_enabled |= 2;
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}
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static void init_machine(void)
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{
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/* Allocate cart_rom here ( 10 MBytes ) */
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cart.rom = memalign(32, MAXROMSIZE);
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if (!cart.rom)
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{
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FONT_writeCenter("Failed to allocate ROM buffer... Rebooting",18,0,640,200,(GXColor)WHITE);
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gxSetScreen();
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sleep(2);
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gx_audio_Shutdown();
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gx_video_Shutdown();
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#ifdef HW_RVL
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DI_Close();
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SYS_ResetSystem(SYS_RESTART,0,0);
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#else
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SYS_ResetSystem(SYS_HOTRESET,0,0);
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#endif
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}
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/* BIOS support */
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load_bios();
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/* allocate global work bitmap */
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memset (&bitmap, 0, sizeof (bitmap));
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bitmap.width = 720;
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bitmap.height = 576;
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bitmap.depth = 16;
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bitmap.granularity = 2;
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bitmap.pitch = bitmap.width * bitmap.granularity;
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bitmap.viewport.w = 256;
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bitmap.viewport.h = 224;
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bitmap.viewport.x = 0;
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bitmap.viewport.y = 0;
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bitmap.data = texturemem;
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}
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/**************************************************
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Load a new rom and performs some initialization
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***************************************************/
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void reloadrom (int size, char *name)
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{
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/* cartridge hot-swap support */
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uint8 hotswap = 0;
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if (cart.romsize)
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hotswap = config.hot_swap;
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/* Load ROM */
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cart.romsize = size;
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load_rom(name);
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if (hotswap)
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{
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cart_hw_init();
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cart_hw_reset();
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}
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else
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{
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/* initialize audio back-end */
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/* 60hz video mode requires synchronization with Video Interrupt. */
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/* VSYNC period is 16715 us on Wii/Gamecube (approx. 802.32 samples per frame) */
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float framerate;
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if (vdp_pal)
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framerate = 50.0;
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else
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framerate = ((config.tv_mode == 0) || (config.tv_mode == 2)) ? (1000000.0/16715.0) : 60.0;
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audio_init(48000, framerate);
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/* System Power ON */
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system_init ();
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ClearGGCodes ();
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system_reset ();
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}
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}
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/**************************************************
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Shutdown everything properly
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***************************************************/
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void shutdown(void)
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{
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/* system shutdown */
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config_save();
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if (config.s_auto & 2)
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slot_autosave(config.s_default,config.s_device);
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system_shutdown();
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audio_shutdown();
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free(cart.rom);
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gx_audio_Shutdown();
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gx_video_Shutdown();
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#ifdef HW_RVL
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DI_Close();
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mload_close();
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#endif
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}
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/***************************************************************************
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* M A I N
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*
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***************************************************************************/
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u32 fat_enabled = 0;
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u32 frameticker = 0;
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int main (int argc, char *argv[])
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{
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#ifdef HW_RVL
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/* try to load IOS 202 */
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if(IOS_GetVersion() != 202 && FindIOS(202))
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IOS_ReloadIOS(202);
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if(IOS_GetVersion() == 202)
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{
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/* disable DVDX stub */
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DI_LoadDVDX(false);
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/* load EHCI module & enable USB2 driver */
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if(mload_init() >= 0 && load_ehci_module())
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USB2Enable(true);
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}
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/* initialize DVD driver */
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DI_Init();
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#endif
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/* initialize video engine */
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gx_video_Init();
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#ifdef HW_DOL
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/* initialize DVD driver */
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DVD_Init ();
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dvd_drive_detect();
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#endif
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/* initialize FAT devices */
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if (fatInitDefault())
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{
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/* base directory */
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char pathname[MAXPATHLEN];
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sprintf (pathname, DEFAULT_PATH);
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DIR_ITER *dir = diropen(pathname);
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if (dir)
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dirclose(dir);
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else
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mkdir(pathname,S_IRWXU);
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/* default SRAM & Savestate files directory */
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sprintf (pathname, "%s/saves",DEFAULT_PATH);
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dir = diropen(pathname);
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if (dir)
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dirclose(dir);
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else
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mkdir(pathname,S_IRWXU);
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/* default Snapshot files directory */
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sprintf (pathname, "%s/snaps",DEFAULT_PATH);
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dir = diropen(pathname);
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if (dir)
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dirclose(dir);
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else
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mkdir(pathname,S_IRWXU);
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}
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/* initialize input engine */
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gx_input_Init();
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/* initialize sound engine (need libfat) */
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gx_audio_Init();
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/* initialize genesis plus core */
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legal();
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config_default();
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history_default();
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init_machine();
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/* run any injected rom */
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if (cart.romsize)
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{
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int size = cart.romsize;
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cart.romsize = 0;
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ARAMFetch((char *)cart.rom, (void *)0x8000, size);
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reloadrom(size,"INJECT.bin");
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ConfigRequested = 0;
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gx_video_Start();
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gx_audio_Start();
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frameticker = 1;
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}
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else if (config.autoload)
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{
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SILENT = 1;
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if (FAT_Open(TYPE_RECENT))
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{
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int size = FAT_LoadFile(cart.rom,0);
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if (size)
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{
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reloadrom(size,filelist[0].filename);
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if (config.s_auto & 1)
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slot_autoload(0,config.s_device);
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if (config.s_auto & 2)
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slot_autoload(config.s_default,config.s_device);
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gx_video_Start();
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gx_audio_Start();
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frameticker = 1;
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ConfigRequested = 0;
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}
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}
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SILENT = 0;
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}
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/* initialize GUI engine */
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GUI_Initialize();
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#ifdef HW_RVL
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/* Power button callback */
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SYS_SetPowerCallback(Power_Off);
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#endif
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/* main emulation loop */
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while (1)
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{
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/* Main Menu request */
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if (ConfigRequested)
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{
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/* stop video & audio */
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gx_audio_Stop();
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gx_video_Stop();
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/* show menu */
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MainMenu ();
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ConfigRequested = 0;
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/* start video & audio */
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gx_audio_Start();
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gx_video_Start();
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frameticker = 1;
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}
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if (frameticker > 1)
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{
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/* skip frame */
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system_frame(1);
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--frameticker;
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}
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else
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{
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while (frameticker < 1)
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usleep(10);
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/* render frame */
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system_frame(0);
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--frameticker;
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/* update video */
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gx_video_Update();
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}
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/* update audio */
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gx_audio_Update();
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}
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return 0;
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}
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