/**
* vdraw_ddraw_reinit_gens_window(): Reinitialize the Gens window.
* @return 0 on success; non-zero on error.
*/
int vdraw_ddraw_reinit_gens_window(void)
{
// Clear the sound buffer.
audio_clear_sound_buffer();
// Stop DirectDraw.
vdraw_ddraw_end();
// Reinitialize the Gens window.
gens_window_reinit();
// Reinitialize DirectDraw.
return vdraw_ddraw_init();
}
/**
* Reset_Genesis(): Resets the Genesis.
*/
void Reset_Genesis(void)
{
// Clear the sound buffer.
audio_clear_sound_buffer();
Controller_1_COM = Controller_2_COM = 0;
Settings.Paused = 0;
// If the ROM size is smaller than 2MB, enable SRAM.
// Otherwise, disable SRAM.
// TODO: Instead of hardcoding 2MB, use SRAM_Start.
if (Rom_Size <= (2 * 1024 * 1024))
{
SRAM_ON = 1;
SRAM_Write = 1;
}
else
{
SRAM_ON = 0;
SRAM_Write = 0;
}
// Reset all CPUs and other components.
M68K_Reset(0);
Z80_Reset();
VDP_Reset();
YM2612_Reset();
// Initialize the controller state.
Init_Controllers();
if (CPU_Mode)
VDP_Status |= 1;
else
VDP_Status &= ~1;
if (Auto_Fix_CS)
ROM::fixChecksum();
}
/**
* Init_Genesis_Bios(): Initialize the Genesis BIOS.
* TODO: Fix this. It doesn't seem to work properly.
*/
void Init_Genesis_Bios(void)
{
// TODO: Compressor support.
FILE *f;
// Clear the sound buffer.
audio_clear_sound_buffer();
// Clear the TMSS firmware buffer.
memset(&Genesis_Rom[0], 0x00, sizeof(Genesis_Rom));
ROM_ByteSwap_State &= ~ROM_BYTESWAPPED_MD_TMSS;
if ((f = fopen(BIOS_Filenames.MD_TMSS, "rb")))
{
size_t n = fread(&Genesis_Rom[0], 1, sizeof(Genesis_Rom), f);
fclose(f);
be16_to_cpu_array(&Genesis_Rom[0], n);
Rom_Size = n;
}
else
{
// No Genesis TMSS ROM.
Rom_Size = sizeof(Genesis_Rom);
}
ROM_ByteSwap_State |= ROM_BYTESWAPPED_MD_TMSS;
memcpy(Rom_Data, Genesis_Rom, Rom_Size);
Game_Mode = 0;
CPU_Mode = 0;
VDP_Num_Vis_Lines = 224;
// Set the clock frequencies.
Set_Clock_Freq(0);
// Reset the CPUs.
M68K_Reset(0);
Z80_Reset();
VDP_Reset();
}
/**
* 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;
}