/**
* setCountry(): Set the current country code.
* @param newCountry New country code.
*/
void Options::setCountry(const int newCountry)
{
unsigned char Reg_1[0x200];
Flag_Clr_Scr = 1;
Country = newCountry;
switch (Country)
{
default:
case -1:
// Auto-detect.
if (Genesis_Started || _32X_Started)
Detect_Country_Genesis();
else if (SegaCD_Started)
Detect_Country_SegaCD();
break;
case 0:
// Japan (NTSC)
Game_Mode = 0;
CPU_Mode = 0;
break;
case 1:
// USA (NTSC)
Game_Mode = 1;
CPU_Mode = 0;
break;
case 2:
// Europe (PAL)
Game_Mode = 1;
CPU_Mode = 1;
break;
case 3:
// Japan (PAL)
Game_Mode = 0;
CPU_Mode = 1;
break;
}
// TODO: Combine this with gens.cpp:Set_Clock_Freq().
if (CPU_Mode)
{
CPL_Z80 = roundDouble((((double)CLOCK_PAL / 15.0) / 50.0) / 312.0);
CPL_M68K = roundDouble((((double)CLOCK_PAL / 7.0) / 50.0) / 312.0);
CPL_MSH2 = roundDouble(((((((double)CLOCK_PAL / 7.0) * 3.0) / 50.0) / 312.0) *
(double)MSH2_Speed) / 100.0);
CPL_SSH2 = roundDouble(((((((double)CLOCK_PAL / 7.0) * 3.0) / 50.0) / 312.0) *
(double)SSH2_Speed) / 100.0);
VDP_Num_Lines = 312;
VDP_Status |= 0x0001;
_32X_VDP.Mode &= ~0x8000;
CD_Access_Timer = 2080;
Timer_Step = 136752;
}
else
{
CPL_Z80 = roundDouble((((double)CLOCK_NTSC / 15.0) / 60.0) / 262.0);
CPL_M68K = roundDouble((((double)CLOCK_NTSC / 7.0) / 60.0) / 262.0);
CPL_MSH2 = roundDouble(((((((double)CLOCK_NTSC / 7.0) * 3.0) / 60.0) / 262.0) *
(double)MSH2_Speed) / 100.0);
CPL_SSH2 = roundDouble(((((((double) CLOCK_NTSC / 7.0) * 3.0) / 60.0) / 262.0) *
(double)SSH2_Speed) / 100.0);
VDP_Num_Lines = 262;
VDP_Status &= 0xFFFE;
_32X_VDP.Mode |= 0x8000;
CD_Access_Timer = 2096;
Timer_Step = 135708;
}
if (audio->enabled())
{
PSG_Save_State();
YM2612_Save(Reg_1);
audio->endSound();
audio->setEnabled(false);
if (CPU_Mode)
{
YM2612_Init(CLOCK_PAL / 7, audio->soundRate(), YM2612_Improv);
PSG_Init(CLOCK_PAL / 15, audio->soundRate());
}
else
{
YM2612_Init(CLOCK_NTSC / 7, audio->soundRate(), YM2612_Improv);
PSG_Init(CLOCK_NTSC / 15, audio->soundRate());
}
if (SegaCD_Started)
Set_Rate_PCM(audio->soundRate());
YM2612_Restore (Reg_1);
PSG_Restore_State();
if (!audio->initSound())
return;
audio->setEnabled(true);
audio->playSound();
}
if (Game_Mode)
{
if (CPU_Mode)
MESSAGE_L("Europe system (50 FPS)", "Europe system (50 FPS)", 1500);
else
MESSAGE_L("USA system (60 FPS)", "USA system (60 FPS)", 1500);
}
else
{
if (CPU_Mode)
MESSAGE_L("Japan system (50 FPS)", "Japan system (50 FPS)", 1500);
else
MESSAGE_L("Japan system (60 FPS)", "Japan system (60 FPS)", 1500);
}
setGameName();
return;
}
/**
* Init_Genesis(): Initialize the Genesis with the specified ROM image.
* @param MD_ROM ROM image struct.
* @return 1 if successful.
*/
int Init_Genesis(ROM_t* MD_ROM)
{
// Clear the sound buffer.
audio_clear_sound_buffer();
Flag_Clr_Scr = 1;
Settings.Paused = Frame_Number = 0;
SRAM_Start = SRAM_End = SRAM_ON = SRAM_Write = 0;
Controller_1_COM = Controller_2_COM = 0;
#ifdef GENS_DEBUGGER
STOP_DEBUGGING();
#endif
#if 0 // TODO: Replace with MDP "exclusive mode" later.
if (!Kaillera_Client_Running)
#endif
Init_Genesis_SRAM(MD_ROM);
// Check what country code should be used.
// TODO: Get rid of magic numbers.
switch (Country)
{
default:
case -1: // Autodetection.
Detect_Country_Genesis(MD_ROM);
break;
case 0: // Japan (NTSC)
Game_Mode = 0;
CPU_Mode = 0;
break;
case 1: // US (NTSC)
Game_Mode = 1;
CPU_Mode = 0;
break;
case 2: // Europe (PAL)
Game_Mode = 1;
CPU_Mode = 1;
break;
case 3: // Japan (PAL)
Game_Mode = 0;
CPU_Mode = 1;
break;
}
VDP_Num_Vis_Lines = 224;
Gen_Version = 0x20 + 0x0; // Version de la megadrive (0x0 - 0xF)
// Byteswap the ROM data.
be16_to_cpu_array(Rom_Data, Rom_Size);
ROM_ByteSwap_State |= ROM_BYTESWAPPED_MD_ROM;
// Reset all CPUs and other components.
M68K_Reset(0);
Z80_Reset();
VDP_Reset();
// Initialize the controller state.
Init_Controllers();
// Set clock rates depending on the CPU mode (NTSC / PAL).
Set_Clock_Freq(0);
// If auto-fix checksum is enabled, fix the ROM checksum.
if (Auto_Fix_CS)
ROM::fixChecksum();
// Initialize sound.
if (audio_get_enabled())
{
audio_end();
if (audio_init(AUDIO_BACKEND_DEFAULT))
audio_set_enabled(false);
else
{
if (audio_play_sound)
audio_play_sound();
}
}
Reset_Update_Timers();
// Set the appropriate frame update function pointers.
Update_Frame = Do_Genesis_Frame;
Update_Frame_Fast = Do_Genesis_Frame_No_VDP;
return 1;
}
