void Check_CD_Command(void)
{
#ifdef DEBUG_CD
fprintf(debug_SCD_file, "CHECK CD COMMAND\n");
#endif
// Check CDD
if (CDD_Complete)
{
CDD_Complete = 0;
#ifdef DEBUG_CD
fprintf(debug_SCD_file, "CDD exporting status\n");
fprintf(debug_SCD_file, "Status=%.4X, Minute=%.4X, Seconde=%.4X, Frame=%.4X, Ext=%.4X\n", CDD.Status, CDD.Minute, CDD.Seconde, CDD.Frame, CDD.Ext);
#endif
CDD_Export_Status();
if (Int_Mask_S68K & 0x10) sub68k_interrupt(4, -1);
}
// Check CDC
if (SCD.Status_CDC & 1) // CDC is reading data ...
{
#ifdef DEBUG_CD
fprintf(debug_SCD_file, "Send a read command\n");
#endif
// DATA ?
if (SCD.TOC.Tracks[SCD.Cur_Track - SCD.TOC.First_Track].Type) CDD.Control |= 0x0100;
else CDD.Control &= ~0x0100; // AUDIO
if (File_Add_Delay == 0)
{
if (CD_Load_System == CDROM_) ASPI_Read_One_LBA_CDC();
else FILE_Read_One_LBA_CDC();
}
else File_Add_Delay--;
}
if (SCD.Status_CDD == FAST_FOW)
{
SCD.Cur_LBA += 10;
CDC_Update_Header();
}
else if (SCD.Status_CDD == FAST_REV)
{
SCD.Cur_LBA -= 10;
if (SCD.Cur_LBA < -150) SCD.Cur_LBA = -150;
CDC_Update_Header();
}
}
/**
* CDC_Reset(): Reset the CDC.
*/
static void CDC_Reset(void)
{
//int i;
// Reseting CDC
// NOTE: Clearing sizeof(CDC.Buffer) bytes ((32 * 1024 * 2) + 2352) breaks SegaCD!
// This must only clear ((16 * 1024 * 2) + 2352) bytes.
memset(CDC.Buffer, 0x00, ((16 * 1024 * 2) + 2352));
CDC_Update_Header();
CDC.COMIN = 0;
CDC.IFSTAT = 0xFF;
CDC.DAC.N = 0;
CDC.DBC.N = 0;
CDC.HEAD.N = 0x01000000;
CDC.PT.N = 0;
CDC.WA.N = 2352 * 2;
CDC.STAT.N = 0x00000080;
CDC.SBOUT = 0;
CDC.IFCTRL = 0;
CDC.CTRL.N = 0;
CDC_Decode_Reg_Read = 0;
}
PICO_INTERNAL int Play_CDD_c3(void)
{
_msf MSF;
int delay, new_lba;
CHECK_TRAY_OPEN
CHECK_CD_PRESENT
// MSF of the track to play in TC buffer
MSF.M = (Pico_mcd->s68k_regs[0x38+10+2] & 0xF) * 10 + (Pico_mcd->s68k_regs[0x38+10+3] & 0xF);
MSF.S = (Pico_mcd->s68k_regs[0x38+10+4] & 0xF) * 10 + (Pico_mcd->s68k_regs[0x38+10+5] & 0xF);
MSF.F = (Pico_mcd->s68k_regs[0x38+10+6] & 0xF) * 10 + (Pico_mcd->s68k_regs[0x38+10+7] & 0xF);
Pico_mcd->scd.Cur_Track = MSF_to_Track(&MSF);
new_lba = MSF_to_LBA(&MSF);
delay = new_lba - Pico_mcd->scd.Cur_LBA;
if (delay < 0) delay = -delay;
delay >>= 12;
if (Pico_mcd->scd.Cur_LBA > 0 && delay < 13)
// based on genplus GX
delay = 13;
Pico_mcd->scd.Cur_LBA = new_lba;
CDC_Update_Header();
cdprintf("Read : Cur LBA = %d, M=%d, S=%d, F=%d", Pico_mcd->scd.Cur_LBA, MSF.M, MSF.S, MSF.F);
if (Pico_mcd->scd.Status_CDD != PLAYING) delay += 20;
Pico_mcd->scd.Status_CDD = PLAYING;
Pico_mcd->cdd.Status = 0x0102;
// Pico_mcd->cdd.Status = COMM_OK;
if (Pico_mcd->scd.File_Add_Delay == 0) Pico_mcd->scd.File_Add_Delay = delay;
if (Pico_mcd->scd.Cur_Track == 1)
{
Pico_mcd->s68k_regs[0x36] |= 0x01; // DATA
}
else
{
Pico_mcd->s68k_regs[0x36] &= ~0x01; // AUDIO
cdda_start_play();
}
if (Pico_mcd->scd.Cur_Track == 100) Pico_mcd->cdd.Minute = 0x0A02;
else Pico_mcd->cdd.Minute = INT_TO_BCDW(Pico_mcd->scd.Cur_Track);
Pico_mcd->cdd.Seconde = 0;
Pico_mcd->cdd.Frame = 0;
Pico_mcd->cdd.Ext = 0;
Pico_mcd->scd.Status_CDC |= 1; // Read data with CDC
Pico_mcd->scd.CDD_Complete = 1;
return 0;
}
int
Seek_CDD_c4 (void)
{
_msf MSF;
CHECK_TRAY_OPEN CHECK_CD_PRESENT
// MSF to seek in TC buffer
MSF.M = (CDD.Trans_Comm[2] & 0xF) + (CDD.Trans_Comm[3] & 0xF) * 10;
MSF.S = (CDD.Trans_Comm[4] & 0xF) + (CDD.Trans_Comm[5] & 0xF) * 10;
MSF.F = (CDD.Trans_Comm[6] & 0xF) + (CDD.Trans_Comm[7] & 0xF) * 10;
SCD.Cur_Track = MSF_to_Track (&MSF);
SCD.Cur_LBA = MSF_to_LBA (&MSF);
CDC_Update_Header ();
SCD.Status_CDC &= ~1; // Stop CDC read
if (CD_Load_System == CDROM_)
{
ASPI_Seek (SCD.Cur_LBA, 1, ASPI_Seek_CDD_c4_COMP);
SCD.Status_CDD = READY;
CDD.Status = 0x0200;
// DATA ?
if (SCD.TOC.Tracks[SCD.Cur_Track - SCD.TOC.First_Track].Type)
CDD.Control |= 0x0100;
else
CDD.Control &= 0xFEFF; // AUDIO
CDD.Minute = 0;
CDD.Seconde = 0;
CDD.Frame = 0;
CDD.Ext = 0;
}
else
{
SCD.Status_CDD = READY;
CDD.Status = 0x0200;
// DATA ?
if (SCD.TOC.Tracks[SCD.Cur_Track - SCD.TOC.First_Track].Type)
CDD.Control |= 0x0100;
else
CDD.Control &= 0xFEFF; // AUDIO
CDD.Minute = 0;
CDD.Seconde = 0;
CDD.Frame = 0;
CDD.Ext = 0;
}
CDD_Complete = 1;
return 0;
}
PICO_INTERNAL void Check_CD_Command(void)
{
cdprintf("CHECK CD COMMAND");
// Check CDC
if (Pico_mcd->scd.Status_CDC & 1) // CDC is reading data ...
{
cdprintf("Got a read command");
// DATA ?
if (Pico_mcd->scd.Cur_Track == 1)
Pico_mcd->s68k_regs[0x36] |= 0x01;
else Pico_mcd->s68k_regs[0x36] &= ~0x01; // AUDIO
if (Pico_mcd->scd.File_Add_Delay == 0)
{
FILE_Read_One_LBA_CDC();
}
else Pico_mcd->scd.File_Add_Delay--;
}
// Check CDD
if (Pico_mcd->scd.CDD_Complete)
{
Pico_mcd->scd.CDD_Complete = 0;
CDD_Export_Status();
}
if (Pico_mcd->scd.Status_CDD == FAST_FOW)
{
Pico_mcd->scd.Cur_LBA += 10;
CDC_Update_Header();
}
else if (Pico_mcd->scd.Status_CDD == FAST_REV)
{
Pico_mcd->scd.Cur_LBA -= 10;
if (Pico_mcd->scd.Cur_LBA < -150) Pico_mcd->scd.Cur_LBA = -150;
CDC_Update_Header();
}
}
int Play_CDD_c3(void)
{
_msf MSF;
int delay, new_lba;
CHECK_TRAY_OPEN
CHECK_CD_PRESENT
if (CD_Load_System == CDROM_)
{
SCD.Status_CDC &= ~1; // Stop read data with CDC
Wait_Read_Complete();
}
// MSF of the track to play in TC buffer
MSF.M = (CDD.Trans_Comm[2] & 0xF) + (CDD.Trans_Comm[3] & 0xF) * 10;
MSF.S = (CDD.Trans_Comm[4] & 0xF) + (CDD.Trans_Comm[5] & 0xF) * 10;
MSF.F = (CDD.Trans_Comm[6] & 0xF) + (CDD.Trans_Comm[7] & 0xF) * 10;
SCD.Cur_Track = MSF_to_Track(&MSF);
new_lba = MSF_to_LBA(&MSF);
delay = new_lba - SCD.Cur_LBA;
if (delay < 0) delay = -delay;
delay >>= 12;
SCD.Cur_LBA = new_lba;
CDC_Update_Header();
#ifdef DEBUG_CD
fprintf(debug_SCD_file, "Read : Cur LBA = %d, M=%d, S=%d, F=%d\n", SCD.Cur_LBA, MSF.M, MSF.S, MSF.F);
#endif
if (CD_Load_System == CDROM_)
{
delay += 20;
delay >>= 2;
ASPI_Seek(SCD.Cur_LBA, 1, ASPI_Fast_Seek_COMP);
ASPI_Flush_Cache_CDC();
}
PICO_INTERNAL int Seek_CDD_c4(void)
{
_msf MSF;
CHECK_TRAY_OPEN
CHECK_CD_PRESENT
// MSF to seek in TC buffer
MSF.M = (Pico_mcd->s68k_regs[0x38+10+2] & 0xF) * 10 + (Pico_mcd->s68k_regs[0x38+10+3] & 0xF);
MSF.S = (Pico_mcd->s68k_regs[0x38+10+4] & 0xF) * 10 + (Pico_mcd->s68k_regs[0x38+10+5] & 0xF);
MSF.F = (Pico_mcd->s68k_regs[0x38+10+6] & 0xF) * 10 + (Pico_mcd->s68k_regs[0x38+10+7] & 0xF);
Pico_mcd->scd.Cur_Track = MSF_to_Track(&MSF);
Pico_mcd->scd.Cur_LBA = MSF_to_LBA(&MSF);
CDC_Update_Header();
Pico_mcd->scd.Status_CDC &= ~1; // Stop CDC read
Pico_mcd->scd.Status_CDD = READY;
Pico_mcd->cdd.Status = 0x0200;
// DATA ?
if (Pico_mcd->scd.Cur_Track == 1)
Pico_mcd->s68k_regs[0x36] |= 0x01;
else Pico_mcd->s68k_regs[0x36] &= ~0x01; // AUDIO
Pico_mcd->cdd.Minute = 0;
Pico_mcd->cdd.Seconde = 0;
Pico_mcd->cdd.Frame = 0;
Pico_mcd->cdd.Ext = 0;
Pico_mcd->scd.CDD_Complete = 1;
return 0;
}
int
Play_CDD_c3 (void)
{
_msf MSF;
int delay, new_lba;
CHECK_TRAY_OPEN CHECK_CD_PRESENT if (CD_Load_System == CDROM_) //aggiunta
{
SCD.Status_CDC &= ~1; // Stop read data with CDC
Wait_Read_Complete ();
}
// MSF of the track to play in TC buffer
MSF.M = (CDD.Trans_Comm[2] & 0xF) + (CDD.Trans_Comm[3] & 0xF) * 10;
MSF.S = (CDD.Trans_Comm[4] & 0xF) + (CDD.Trans_Comm[5] & 0xF) * 10;
MSF.F = (CDD.Trans_Comm[6] & 0xF) + (CDD.Trans_Comm[7] & 0xF) * 10;
SCD.Cur_Track = MSF_to_Track (&MSF);
new_lba = MSF_to_LBA (&MSF);
delay = new_lba - SCD.Cur_LBA;
if (delay < 0)
delay = -delay;
delay >>= 12;
SCD.Cur_LBA = new_lba;
CDC_Update_Header ();
#ifdef DEBUG_CD
fprintf (debug_SCD_file, "Read : Cur LBA = %d, M=%d, S=%d, F=%d\n",
SCD.Cur_LBA, MSF.M, MSF.S, MSF.F);
#endif
if (CD_Load_System == CDROM_)
{
delay += 20;
//delay >>= 2;
//ASPI_Seek (SCD.Cur_LBA, 1, ASPI_Fast_Seek_COMP); //aggiunta
}
else if (SCD.Status_CDD != PLAYING)
delay += 20;
SCD.Status_CDD = PLAYING;
CDD.Status = 0x0102;
// CDD.Status = COMM_OK;
if (File_Add_Delay == 0)
File_Add_Delay = delay;
if (SCD.TOC.Tracks[SCD.Cur_Track - SCD.TOC.First_Track].Type)
{
CDD.Control |= 0x0100; // DATA
}
else
{
CDD.Control &= ~0x0100; // AUDIO
CD_Audio_Starting = 1;
if (CD_Load_System == FILE_ISO)
FILE_Play_CD_LBA ();
}
if (SCD.Cur_Track == 100)
CDD.Minute = 0x0A02;
else
CDD.Minute = INT_TO_BCDW (SCD.Cur_Track);
CDD.Seconde = 0;
CDD.Frame = 0;
CDD.Ext = 0;
SCD.Status_CDC |= 1; // Read data with CDC
CDD_Complete = 1;
return 0;
}
