Path: blob/master/psx/mednadisc/cdrom/scsicd-pce-commands.inc
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/********************************************************
* *
* PC Engine CD Command 0xD8 - SAPSP *
* *
********************************************************/
static void DoNEC_PCE_SAPSP(const uint8 *cdb)
{
uint32 new_read_sec_start;
//printf("Set audio start: %02x %02x %02x %02x %02x %02x %02x\n", cdb[9], cdb[1], cdb[2], cdb[3], cdb[4], cdb[5], cdb[6]);
switch (cdb[9] & 0xc0)
{
default: //SCSIDBG("Unknown SAPSP 9: %02x\n", cdb[9]);
case 0x00:
new_read_sec_start = (cdb[3] << 16) | (cdb[4] << 8) | cdb[5];
break;
case 0x40:
new_read_sec_start = AMSF_to_LBA(BCD_to_U8(cdb[2]), BCD_to_U8(cdb[3]), BCD_to_U8(cdb[4]));
break;
case 0x80:
{
int track = BCD_to_U8(cdb[2]);
if(!track)
track = 1;
else if(track >= toc.last_track + 1)
track = 100;
new_read_sec_start = toc.tracks[track].lba;
}
break;
}
//printf("%lld\n", (long long)(monotonic_timestamp - pce_lastsapsp_timestamp) * 1000 / System_Clock);
if(cdda.CDDAStatus == CDDASTATUS_PLAYING && new_read_sec_start == read_sec_start && ((int64)(monotonic_timestamp - pce_lastsapsp_timestamp) * 1000 / System_Clock) < 190)
{
pce_lastsapsp_timestamp = monotonic_timestamp;
SendStatusAndMessage(STATUS_GOOD, 0x00);
CDIRQCallback(SCSICD_IRQ_DATA_TRANSFER_DONE);
return;
}
pce_lastsapsp_timestamp = monotonic_timestamp;
read_sec = read_sec_start = new_read_sec_start;
read_sec_end = toc.tracks[100].lba;
cdda.CDDAReadPos = 588;
cdda.CDDAStatus = CDDASTATUS_PAUSED;
cdda.PlayMode = PLAYMODE_SILENT;
if(cdb[1])
{
cdda.PlayMode = PLAYMODE_NORMAL;
cdda.CDDAStatus = CDDASTATUS_PLAYING;
}
if(read_sec < toc.tracks[100].lba)
Cur_CDIF->HintReadSector(read_sec);
SendStatusAndMessage(STATUS_GOOD, 0x00);
CDIRQCallback(SCSICD_IRQ_DATA_TRANSFER_DONE);
}
/********************************************************
* *
* PC Engine CD Command 0xD9 - SAPEP *
* *
********************************************************/
static void DoNEC_PCE_SAPEP(const uint8 *cdb)
{
uint32 new_read_sec_end;
//printf("Set audio end: %02x %02x %02x %02x %02x %02x %02x\n", cdb[9], cdb[1], cdb[2], cdb[3], cdb[4], cdb[5], cdb[6]);
switch (cdb[9] & 0xc0)
{
default: //SCSIDBG("Unknown SAPEP 9: %02x\n", cdb[9]);
case 0x00:
new_read_sec_end = (cdb[3] << 16) | (cdb[4] << 8) | cdb[5];
break;
case 0x40:
new_read_sec_end = BCD_to_U8(cdb[4]) + 75 * (BCD_to_U8(cdb[3]) + 60 * BCD_to_U8(cdb[2]));
new_read_sec_end -= 150;
break;
case 0x80:
{
int track = BCD_to_U8(cdb[2]);
if(!track)
track = 1;
else if(track >= toc.last_track + 1)
track = 100;
new_read_sec_end = toc.tracks[track].lba;
}
break;
}
read_sec_end = new_read_sec_end;
switch(cdb[1]) // PCE CD(TODO: Confirm these, and check the mode mask):
{
default:
case 0x03: cdda.PlayMode = PLAYMODE_NORMAL;
cdda.CDDAStatus = CDDASTATUS_PLAYING;
break;
case 0x02: cdda.PlayMode = PLAYMODE_INTERRUPT;
cdda.CDDAStatus = CDDASTATUS_PLAYING;
break;
case 0x01: cdda.PlayMode = PLAYMODE_LOOP;
cdda.CDDAStatus = CDDASTATUS_PLAYING;
break;
case 0x00: cdda.PlayMode = PLAYMODE_SILENT;
cdda.CDDAStatus = CDDASTATUS_STOPPED;
break;
}
SendStatusAndMessage(STATUS_GOOD, 0x00);
}
/********************************************************
* *
* PC Engine CD Command 0xDA - Pause *
* *
********************************************************/
static void DoNEC_PCE_PAUSE(const uint8 *cdb)
{
if(cdda.CDDAStatus != CDDASTATUS_STOPPED) // Hmm, should we give an error if it tries to pause and it's already paused?
{
cdda.CDDAStatus = CDDASTATUS_PAUSED;
SendStatusAndMessage(STATUS_GOOD, 0x00);
}
else // Definitely give an error if it tries to pause when no track is playing!
{
CommandCCError(SENSEKEY_ILLEGAL_REQUEST, NSE_AUDIO_NOT_PLAYING);
}
}
/********************************************************
* *
* PC Engine CD Command 0xDD - Read Subchannel Q *
* *
********************************************************/
static void DoNEC_PCE_READSUBQ(const uint8 *cdb)
{
uint8 *SubQBuf = cd.SubQBuf[QMode_Time];
uint8 data_in[8192];
memset(data_in, 0x00, 10);
data_in[2] = SubQBuf[1]; // Track
data_in[3] = SubQBuf[2]; // Index
data_in[4] = SubQBuf[3]; // M(rel)
data_in[5] = SubQBuf[4]; // S(rel)
data_in[6] = SubQBuf[5]; // F(rel)
data_in[7] = SubQBuf[7]; // M(abs)
data_in[8] = SubQBuf[8]; // S(abs)
data_in[9] = SubQBuf[9]; // F(abs)
if(cdda.CDDAStatus == CDDASTATUS_PAUSED)
data_in[0] = 2; // Pause
else if(cdda.CDDAStatus == CDDASTATUS_PLAYING || cdda.CDDAStatus == CDDASTATUS_SCANNING) // FIXME: Is this the correct status code for scanning playback?
data_in[0] = 0; // Playing
else
data_in[0] = 3; // Stopped
DoSimpleDataIn(data_in, 10);
}
/********************************************************
* *
* PC Engine CD Command 0xDE - Get Directory Info *
* *
********************************************************/
static void DoNEC_PCE_GETDIRINFO(const uint8 *cdb)
{
// Problems:
// Returned data lengths on real PCE are not confirmed.
// Mode 0x03 behavior not tested on real PCE
uint8 data_in[2048];
uint32 data_in_size = 0;
memset(data_in, 0, sizeof(data_in));
switch(cdb[1])
{
default: //MDFN_DispMessage("Unknown GETDIRINFO Mode: %02x", cdb[1]);
//printf("Unknown GETDIRINFO Mode: %02x", cdb[1]);
case 0x0:
data_in[0] = U8_to_BCD(toc.first_track);
data_in[1] = U8_to_BCD(toc.last_track);
data_in_size = 2;
break;
case 0x1:
{
uint8 m, s, f;
LBA_to_AMSF(toc.tracks[100].lba, &m, &s, &f);
data_in[0] = U8_to_BCD(m);
data_in[1] = U8_to_BCD(s);
data_in[2] = U8_to_BCD(f);
data_in_size = 3;
}
break;
case 0x2:
{
uint8 m, s, f;
int track = BCD_to_U8(cdb[2]);
if(!track)
track = 1;
else if(cdb[2] == 0xAA)
{
track = 100;
}
else if(track > 99)
{
CommandCCError(SENSEKEY_ILLEGAL_REQUEST, NSE_INVALID_PARAMETER);
return;
}
LBA_to_AMSF(toc.tracks[track].lba, &m, &s, &f);
data_in[0] = U8_to_BCD(m);
data_in[1] = U8_to_BCD(s);
data_in[2] = U8_to_BCD(f);
data_in[3] = toc.tracks[track].control;
data_in_size = 4;
}
break;
}
DoSimpleDataIn(data_in, data_in_size);
}