//返回值:0,执行OK;
// 其他,错误代码
u8 nes_main(GContext *ctx)
{
u16 offset=0;
u8 res;
NesHeader *neshreader = (NesHeader *) rom_file;
//由于NES文件头类型以0x1A结束，（0x1a是Ctrl+Z,这是模拟文件结束的符号）
//所以使用strcncmp比较前3个字节。
if(strncmp(neshreader->filetype, "NES", 3) != 0)
{
APP_LOG(APP_LOG_LEVEL_INFO, "\r\n文件未加载或文件类型错误, NES模拟器退出。");
return 1;
}else
{
APP_LOG(APP_LOG_LEVEL_INFO, "\r\n文件加载完成。");
APP_LOG(APP_LOG_LEVEL_INFO, "\r\n 16kB ROM 的数目: %d", neshreader->romnum);
APP_LOG(APP_LOG_LEVEL_INFO, "\r\n 8kB VROM 的数目: %d", neshreader->vromnum);
if((neshreader->romfeature & 0x01) == 0){
APP_LOG(APP_LOG_LEVEL_INFO, "\r\n 水平镜像");
}else{
APP_LOG(APP_LOG_LEVEL_INFO, "\r\n 垂直镜像");
}
if((neshreader->romfeature & 0x02) == 0){
APP_LOG(APP_LOG_LEVEL_INFO, "\r\n 无记忆SRAM");
}else{
APP_LOG(APP_LOG_LEVEL_INFO, "\r\n 有记忆SRAM");
}
if((neshreader->romfeature & 0x04) == 0)
{
APP_LOG(APP_LOG_LEVEL_INFO, "\r\n 无512字节的trainer($7000-$71FF)");
}else
{
offset=512;
APP_LOG(APP_LOG_LEVEL_INFO, "\r\n 有512字节的trainer(ROM格式暂不支持)");
}
if((neshreader->romfeature & 0x08) == 0){
APP_LOG(APP_LOG_LEVEL_INFO, "\r\n 2屏幕VRAM布局");
}else{
APP_LOG(APP_LOG_LEVEL_INFO, "\r\n 4屏幕VRAM布局(暂不支持)");
}
APP_LOG(APP_LOG_LEVEL_INFO, "\r\n iNES Mapper Numbers: %d", (neshreader->rommappernum & 0xF0)|( neshreader->romfeature >> 4));
}
res=nes_mem_creat();//申请内存
if(res==0)//申请成功了.则运行游戏
{
//初始化nes 模拟器
init6502mem(0, //exp_rom
0, //sram 由卡类型决定, 暂不支持
((u8*)&rom_file[offset+0x10]), //prg_rombank, 存储器大小 由卡类型决定
neshreader->romnum
);//初始化6502存储器镜像
reset6502();//复位
PPU_Init(((u8*)&rom_file[offset+0x10] + (neshreader->romnum * 0x4000)), (neshreader->romfeature & 0x01));//PPU_初始化
NES_JoyPadInit();
NesFrameCycle(ctx);//模拟器循环执行
}
nes_mem_delete();//释放内存
return res;
}
int main()
{
int i, x, y;
touchPosition lastTouch;
u32 repeatkeys = 0;
int repeatstate = 0;
int repeatcount = 0;
running = 0;
pause = 0;
exitemu = 0;
PPU_Init();
srvInit();
aptInit();
aptOpenSession();
APT_SetAppCpuTimeLimit(NULL, 30); // enables syscore usage
aptCloseSession();
gfxInit();
hidInit(NULL);
fsInit();
GPU_Init(NULL);
gpuCmdSize = 0x40000;
gpuCmd = (u32*)linearAlloc(gpuCmdSize*4);
GPU_Reset(gxCmdBuf, gpuCmd, gpuCmdSize);
shader = SHDR_ParseSHBIN((u32*)blarg_shbin, blarg_shbin_size);
GX_SetMemoryFill(gxCmdBuf, (u32*)gpuOut, 0x404040FF, (u32*)&gpuOut[0x2EE00], 0x201, (u32*)gpuDOut, 0x00000000, (u32*)&gpuDOut[0x2EE00], 0x201);
gfxSwapBuffersGpu();
UI_SetFramebuffer(gfxGetFramebuffer(GFX_BOTTOM, GFX_LEFT, NULL, NULL));
BorderTex = (u32*)linearAlloc(512*256*4);
MainScreenTex = (u32*)linearAlloc(512*256*4);
SubScreenTex = (u32*)linearAlloc(512*256*4);
BrightnessTex = (u8*)linearAlloc(8*256);
borderVertices = (float*)linearAlloc(5*3 * 2 * sizeof(float));
screenVertices = (float*)linearAlloc(7*3 * 2 * sizeof(float));
float* fptr = &vertexList[0];
for (i = 0; i < 5*3*2; i++) borderVertices[i] = *fptr++;
for (i = 0; i < 7*3*2; i++) screenVertices[i] = *fptr++;
sdmcArchive = (FS_archive){0x9, (FS_path){PATH_EMPTY, 1, (u8*)""}};
FSUSER_OpenArchive(NULL, &sdmcArchive);
if (!LoadBorder("/blargSnesBorder.bmp"))
CopyBitmapToTexture(defaultborder, BorderTex, 400, 240, 0xFF, 0, 64, true);
CopyBitmapToTexture(screenfill, PPU_MainBuffer, 256, 224, 0, 16, 64, false);
memset(PPU_SubBuffer, 0, 256*256*4);
memset(PPU_Brightness, 0xFF, 224);
UI_Switch(&UI_ROMMenu);
svcCreateEvent(&SPCSync, 0);
aptSetupEventHandler();
APP_STATUS status;
while((status = aptGetStatus()) != APP_EXITING)
{
if(status == APP_RUNNING)
{
svcSignalEvent(SPCSync);
hidScanInput();
u32 press = hidKeysDown();
u32 held = hidKeysHeld();
u32 release = hidKeysUp();
GPUCMD_SetBuffer(gpuCmd, gpuCmdSize, 0);
RenderTopScreen();
GPUCMD_Finalize();
GPUCMD_Run(gxCmdBuf);
if (running)
{
// emulate
CPU_Run(); // runs the SNES for one frame. Handles PPU rendering.
// SRAM autosave check
// TODO: also save SRAM under certain circumstances (pausing, returning to home menu, etc)
framecount++;
if (!(framecount & 7))
SNES_SaveSRAM();
}
else
{
// update UI
if (held & KEY_TOUCH)
{
hidTouchRead(&lastTouch);
UI_Touch(true, lastTouch.px, lastTouch.py);
held &= ~KEY_TOUCH;
}
else if (release & KEY_TOUCH)
{
UI_Touch(false, lastTouch.px, lastTouch.py);
release &= ~KEY_TOUCH;
}
if (press)
{
UI_ButtonPress(press);
// key repeat
repeatkeys = press & (KEY_UP|KEY_DOWN|KEY_LEFT|KEY_RIGHT);
repeatstate = 1;
repeatcount = 15;
}
else if (held == repeatkeys)
{
repeatcount--;
if (!repeatcount)
{
repeatcount = 7;
if (repeatstate == 2)
UI_ButtonPress(repeatkeys);
else
repeatstate = 2;
}
}
}
UI_SetFramebuffer(gfxGetFramebuffer(GFX_BOTTOM, GFX_LEFT, NULL, NULL));
UI_Render();
/*GPUCMD_SetBuffer(gpuCmd, gpuCmdSize, 0);
RenderTopScreen();
GPUCMD_Finalize();
GPUCMD_Run(gxCmdBuf);*/
// flush the bottomscreen cache while the PICA200 is busy rendering
GSPGPU_FlushDataCache(NULL, gfxGetFramebuffer(GFX_BOTTOM, GFX_LEFT, NULL, NULL), 0x38400);
// wait for the PICA200 to finish drawing
gspWaitForP3D();
// copy new screen textures
// SetDisplayTransfer with flags=2 converts linear graphics to the tiled format used for textures
GX_SetDisplayTransfer(gxCmdBuf, PPU_MainBuffer, 0x01000200, MainScreenTex, 0x01000200, 0x2);
gspWaitForPPF();
GX_SetDisplayTransfer(gxCmdBuf, PPU_SubBuffer, 0x01000200, SubScreenTex, 0x01000200, 0x2);
gspWaitForPPF();
// copy brightness.
// TODO do better
u8* bptr = BrightnessTex;
for (i = 0; i < 224;)
{
u32 pixels = *(u32*)&PPU_Brightness[i];
i += 4;
*bptr = (u8)pixels;
pixels >>= 8;
bptr += 2;
*bptr = (u8)pixels;
pixels >>= 8;
bptr += 6;
*bptr = (u8)pixels;
pixels >>= 8;
bptr += 2;
*bptr = (u8)pixels;
pixels >>= 8;
bptr += 22;
}
// transfer the final color buffer to the LCD and clear it
// we can mostly overlap those two operations
GX_SetDisplayTransfer(gxCmdBuf, gpuOut, 0x019001E0, (u32*)gfxGetFramebuffer(GFX_TOP, GFX_LEFT, NULL, NULL), 0x019001E0, 0x01001000);
svcSleepThread(20000);
GX_SetMemoryFill(gxCmdBuf, gpuOut, 0x404040FF, &gpuOut[0x2EE00], 0x201, gpuDOut, 0x00000000, &gpuDOut[0x2EE00], 0x201);
gspWaitForPPF();
gspWaitForPSC0();
gspWaitForEvent(GSPEVENT_VBlank0, false);
gfxSwapBuffersGpu();
}
else if(status == APP_SUSPENDING)
