void GM_Title()
{
PlaySound_Special(BGM_Stop);
ClearPLC();
PaletteFadeOut();
DISABLE_INTERRUPTS();
SoundDriverLoad();
VDP_RegWrite(0x00, 4); // 8-colour mode
VDP_RegWrite(0x02, vram_fg >> 10); // set foreground nametable address
VDP_RegWrite(0x04, vram_bg >> 13); // set background nametable address
VDP_RegWrite(0x10, 1); // 64-cell hscroll size
VDP_RegWrite(0x12, 0); // window vertical position
VDP_RegWrite(0x0B, 3);
VDP_RegWrite(0x07, 0x20); // set background colour (palette line 2, entry 0)
f_wtr_state = 0;
ClearScreen();
Clear_Objects();
NemDec(Nem_JapNames, 0);
NemDec(Nem_CreditText, 0x14C0);
EniDec(Eni_JapNames, 0xFF0000, 0);
CopyTilemap(0xFF0000, 0xC000, 0x27, 0x1B);
Clear_Palette(v_pal_dry_dup);
PalLoad1(Palette_Sonic);
v_objspace[2].id = ID_CreditsText;
ExecuteObjects();
BuildSprites();
PaletteFadeIn();
DISABLE_INTERRUPTS();
NemDec(Nem_TitleFg, 0x4000);
NemDec(Nem_TitleSonic, 0x6000);
NemDec(Nem_TitleTM, 0xA200);
CopyToVRAM(Art_Text, 0xD000, 0x290 * sizeof(ushort));
v_lastlamp = 0;
v_debuguse = 0;
f_demo = 0;
v_w_FFEA = 0;
v_zone = 0;
v_pcyc_time = 0;
LevelSizeLoad();
DeformLayers();
EniDec(Blk16_GHZ, v_16x16, 0);
KosDec(Blk256_GHZ, v_256x256);
LevelLayoutLoad();
PaletteFadeOut();
DISABLE_INTERRUPTS();
ClearScreen();
DrawChunks(0x6000, &v_bg1posx, v_lvllayout + 0x40);
EniDec(Eni_Title, 0xFF0000, 0);
CopyTilemap(0xFF0000, 0xC206, 0x21, 0x15);
NemDec(Nem_GHZ_1st, 0);
PalLoad1(Palette_Title);
PlaySound_Special(BGM_Title);
f_debugmode = 0;
v_demolength = 0x178;
memset(&v_objspace[2], 0, 32);
v_objspace[1].id = ID_TitleSonic;
v_objspace[2].id = ID_PSBTM; // "PRESS START BUTTON"
if(v_megadrive & 0x80)
{
// Outside Japan, load the TM object
v_objspace[3].id = ID_PSBTM;
v_objspace[3].frame = 3;
}
v_objspace[4].id = ID_PSBTM;
v_objspace[4].frame = 2; // sprite line limiter..?
ExecuteObjects();
DeformLayers();
BuildSprites();
NewPLC(PLC_Main);
v_title_dcount = 0;
v_title_ccount = 0;
VDP_Control(v_vdp_buffer1 | 0x40);
PaletteFadeIn();
do
{
WaitForVBlank(VBlank_Title);
ExecuteObjects()
DeformLayers();
BuildSprites();
PCycle_Title();
RunPLC();
v_objspace[0].x += 2;
if(v_objspace[0].x >= 7168)
{
v_gamemode = GameMode_Sega;
return;
}
auto levSelCode = (v_megadrive & 0x80) ? LevSelCode_US : LevSelCode_J;
auto buttons = v_jpadpress1 & Buttons_Dir;
if(buttons == levSelCode[v_title_dcount])
{
v_title_dcount++;
if(buttons == 0)
{
auto count = (v_title_ccount >> 1) & 3;
if(count == 0)
f_levselcheat = true;
else if(v_megadrive & 0x80)
{
// International version
f_debugcheat = true;
f_slomocheat = true;
}
else
{
/// Japanese version
if(count == 1)
f_slomocheat = true;
else if(count == 2)
f_debugcheat = true;
else
f_creditscheat = true;
}
PlaySound_Special(SFX_Ring);
}
}
void UpdateObjects()
{
CopyToVRAM(REG_OBJ_BASE, (uint16_t *) ObjBuffer, sizeof(ObjBuffer) / sizeof(uint16_t));
}