mirror of
https://github.com/ekeeke/Genesis-Plus-GX.git
synced 2024-09-10 16:53:15 +02:00
Merge git://github.com/ekeeke/Genesis-Plus-GX
This commit is contained in:
commit
ca48e03f07
@ -876,7 +876,7 @@ void cdd_read_audio(unsigned int samples)
|
||||
void cdd_update(void)
|
||||
{
|
||||
#ifdef LOG_CDD
|
||||
error("LBA = %d (track n°%d)\n", cdd.lba, cdd.index);
|
||||
error("LBA = %d (track n°%d)(latency=%d)\n", cdd.lba, cdd.index, cdd.latency);
|
||||
#endif
|
||||
|
||||
/* seeking disc */
|
||||
@ -1034,17 +1034,20 @@ void cdd_process(void)
|
||||
{
|
||||
case 0x00: /* Drive Status */
|
||||
{
|
||||
/* RS1-RS8 unchanged */
|
||||
scd.regs[0x38>>1].byte.h = cdd.status;
|
||||
break;
|
||||
}
|
||||
|
||||
case 0x01: /* Stop Drive */
|
||||
{
|
||||
/* update status */
|
||||
cdd.status = cdd.loaded ? CD_STOP : NO_DISC;
|
||||
|
||||
/* no audio track playing */
|
||||
scd.regs[0x36>>1].byte.h = 0x01;
|
||||
|
||||
/* RS1-RS8 ignored, expects 0x0 ("no disc" ?) in RS0 once */
|
||||
scd.regs[0x38>>1].w = 0x0000;
|
||||
scd.regs[0x3a>>1].w = 0x0000;
|
||||
scd.regs[0x3c>>1].w = 0x0000;
|
||||
@ -1066,7 +1069,7 @@ void cdd_process(void)
|
||||
scd.regs[0x3a>>1].w = lut_BCD_16[(lba/75)/60];
|
||||
scd.regs[0x3c>>1].w = lut_BCD_16[(lba/75)%60];
|
||||
scd.regs[0x3e>>1].w = lut_BCD_16[(lba%75)];
|
||||
scd.regs[0x40>>1].byte.h = cdd.index ? 0x00 : 0x04; /* Current block flags (bit0 = mute status, bit1: pre-emphasis status, bit2: track type) */
|
||||
scd.regs[0x40>>1].byte.h = cdd.index ? 0x00 : 0x04; /* Current block flags in RS8 (bit0 = mute status, bit1: pre-emphasis status, bit2: track type) */
|
||||
break;
|
||||
}
|
||||
|
||||
@ -1077,7 +1080,7 @@ void cdd_process(void)
|
||||
scd.regs[0x3a>>1].w = lut_BCD_16[(lba/75)/60];
|
||||
scd.regs[0x3c>>1].w = lut_BCD_16[(lba/75)%60];
|
||||
scd.regs[0x3e>>1].w = lut_BCD_16[(lba%75)];
|
||||
scd.regs[0x40>>1].byte.h = cdd.index ? 0x00 : 0x04; /* Current block flags (bit0 = mute status, bit1: pre-emphasis status, bit2: track type) */
|
||||
scd.regs[0x40>>1].byte.h = cdd.index ? 0x00 : 0x04; /* Current block flags in RS8 (bit0 = mute status, bit1: pre-emphasis status, bit2: track type) */
|
||||
break;
|
||||
}
|
||||
|
||||
@ -1108,7 +1111,7 @@ void cdd_process(void)
|
||||
scd.regs[0x3a>>1].w = 0x0001;
|
||||
scd.regs[0x3c>>1].w = lut_BCD_16[cdd.toc.last];
|
||||
scd.regs[0x3e>>1].w = 0x0000; /* Drive Version (?) in RS6-RS7 */
|
||||
scd.regs[0x40>>1].byte.h = 0x00; /* Lead-In flags (bit0 = mute status, bit1: pre-emphasis status, bit2: track type) */
|
||||
scd.regs[0x40>>1].byte.h = 0x00; /* Lead-In flags in RS8 (bit0 = mute status, bit1: pre-emphasis status, bit2: track type) */
|
||||
break;
|
||||
}
|
||||
|
||||
@ -1150,37 +1153,38 @@ void cdd_process(void)
|
||||
(scd.regs[0x46>>1].byte.h * 10 + scd.regs[0x46>>1].byte.l)) * 75 +
|
||||
(scd.regs[0x48>>1].byte.h * 10 + scd.regs[0x48>>1].byte.l) - 150;
|
||||
|
||||
/* CD drive access time */
|
||||
/* CD drive latency */
|
||||
if (!cdd.latency)
|
||||
{
|
||||
/* Fixes a few games hanging during intro because they expect data to be read with some delay */
|
||||
/* Radical Rex needs at least one interrupt delay */
|
||||
/* Wolf Team games (Anet Futatabi, Cobra Command, Road Avenger & Time Gal) need at least 6 interrupts delay */
|
||||
/* Space Adventure Cobra (2nd morgue scene) needs at least 13 interrupts delay (incl. seek time, so 6 here is OK) */
|
||||
/* Jeopardy & ESPN Sunday Night NFL are picky about this as well: 7 interrupts delay (+ seek time) seems OK */
|
||||
cdd.latency = 7;
|
||||
/* Wolf Team games (Anet Futatabi, Cobra Command, Road Avenger & Time Gal) need at least 6 interrupts delay */
|
||||
/* Space Adventure Cobra (2nd morgue scene) needs at least 13 interrupts delay (incl. seek time, so 6 is OK) */
|
||||
/* Jeopardy & ESPN Sunday Night NFL are picky about this as well: 10 interrupts delay (+ seek time) seems OK */
|
||||
cdd.latency = 10;
|
||||
}
|
||||
|
||||
/* CD drive seek time */
|
||||
/* Some delay is especially needed when playing audio tracks located at the end of the disc (ex: Sonic CD intro) */
|
||||
/* max. seek time = 1.5s = 1.5 x 75 = 112.5 CDD interrupts (rounded to 120) for 270000 sectors max on disc */
|
||||
/* Note: this is only a rough approximation, on real hardware, drive seek time is much likely not linear */
|
||||
if (lba < cdd.lba)
|
||||
{
|
||||
cdd.latency += (((cdd.lba - lba) * 120) / 270000);
|
||||
}
|
||||
else
|
||||
/* max. seek time = 1.5 s = 1.5 x 75 = 112.5 CDD interrupts (rounded to 120) for 270000 sectors max on disc. */
|
||||
/* Note: This is only a rough approximation since, on real hardware, seek time is much likely not linear and */
|
||||
/* latency much larger than above value, but this model works fine for Sonic CD (track 26 playback needs to */
|
||||
/* be enough delayed to start in sync with intro sequence, as compared with real hardware recording). */
|
||||
if (lba > cdd.lba)
|
||||
{
|
||||
cdd.latency += (((lba - cdd.lba) * 120) / 270000);
|
||||
}
|
||||
else
|
||||
{
|
||||
cdd.latency += (((cdd.lba - lba) * 120) / 270000);
|
||||
}
|
||||
|
||||
/* update current LBA */
|
||||
cdd.lba = lba;
|
||||
|
||||
/* update current track index */
|
||||
while ((cdd.toc.tracks[index].end <= lba) && (index < cdd.toc.last)) index++;
|
||||
cdd.index = index;
|
||||
|
||||
/* no audio track playing */
|
||||
scd.regs[0x36>>1].byte.h = 0x01;
|
||||
|
||||
/* seek to current block */
|
||||
if (!index)
|
||||
{
|
||||
@ -1207,11 +1211,13 @@ void cdd_process(void)
|
||||
}
|
||||
}
|
||||
|
||||
/* update current LBA */
|
||||
cdd.lba = lba;
|
||||
/* no audio track playing (yet) */
|
||||
scd.regs[0x36>>1].byte.h = 0x01;
|
||||
|
||||
/* update status */
|
||||
cdd.status = CD_PLAY;
|
||||
|
||||
/* return current track number in RS2-RS3 */
|
||||
scd.regs[0x38>>1].w = (CD_PLAY << 8) | 0x02;
|
||||
scd.regs[0x3a>>1].w = (cdd.index < cdd.toc.last) ? lut_BCD_16[index + 1] : 0x0A0A;
|
||||
scd.regs[0x3c>>1].w = 0x0000;
|
||||
@ -1230,14 +1236,17 @@ void cdd_process(void)
|
||||
(scd.regs[0x46>>1].byte.h * 10 + scd.regs[0x46>>1].byte.l)) * 75 +
|
||||
(scd.regs[0x48>>1].byte.h * 10 + scd.regs[0x48>>1].byte.l) - 150;
|
||||
|
||||
/* CD drive seek time (required by Switch / Panic intro - see CD_PLAY command for details)*/
|
||||
if (lba < cdd.lba)
|
||||
/* CD drive seek time */
|
||||
/* We are using similar linear model as above, although still not exactly accurate, */
|
||||
/* it works fine for Switch/Panic! intro (Switch needs at least 30 interrupts while */
|
||||
/* seeking from 00:05:63 to 24:03:19, Panic! when seeking from 00:05:60 to 24:06:07) */
|
||||
if (lba > cdd.lba)
|
||||
{
|
||||
cdd.latency = (((cdd.lba - lba) * 120) / 270000);
|
||||
cdd.latency = ((lba - cdd.lba) * 120) / 270000;
|
||||
}
|
||||
else
|
||||
else
|
||||
{
|
||||
cdd.latency = (((lba - cdd.lba) * 120) / 270000);
|
||||
cdd.latency = ((cdd.lba - lba) * 120) / 270000;
|
||||
}
|
||||
|
||||
/* update current LBA */
|
||||
@ -1266,11 +1275,13 @@ void cdd_process(void)
|
||||
|
||||
/* update status */
|
||||
cdd.status = CD_SEEK;
|
||||
scd.regs[0x38>>1].w = CD_SEEK << 8;
|
||||
|
||||
/* unknown RS1-RS8 values (returning 0xF in RS1 invalidates track infos usually returned in RS2-RS8, which fixes Final Fight CD intro when seek time is emulated) */
|
||||
scd.regs[0x38>>1].w = (CD_SEEK << 8) | 0x0f;
|
||||
scd.regs[0x3a>>1].w = 0x0000;
|
||||
scd.regs[0x3c>>1].w = 0x0000;
|
||||
scd.regs[0x3e>>1].w = 0x0000;
|
||||
scd.regs[0x40>>1].w = ~CD_SEEK & 0x0f;
|
||||
scd.regs[0x40>>1].w = ~(CD_SEEK + 0xf) & 0x0f;
|
||||
return;
|
||||
}
|
||||
|
||||
@ -1279,65 +1290,58 @@ void cdd_process(void)
|
||||
/* no audio track playing */
|
||||
scd.regs[0x36>>1].byte.h = 0x01;
|
||||
|
||||
/* update status */
|
||||
cdd.status = CD_READY;
|
||||
scd.regs[0x38>>1].w = CD_READY << 8;
|
||||
scd.regs[0x3a>>1].w = 0x0000;
|
||||
scd.regs[0x3c>>1].w = 0x0000;
|
||||
scd.regs[0x3e>>1].w = 0x0000;
|
||||
scd.regs[0x40>>1].w = ~CD_READY & 0x0f;
|
||||
return;
|
||||
/* update status (RS1-RS8 unchanged) */
|
||||
cdd.status = scd.regs[0x38>>1].byte.h = CD_READY;
|
||||
break;
|
||||
}
|
||||
|
||||
case 0x07: /* Resume */
|
||||
{
|
||||
/* update status */
|
||||
cdd.status = CD_PLAY;
|
||||
scd.regs[0x38>>1].w = (CD_PLAY << 8) | 0x02;
|
||||
scd.regs[0x3a>>1].w = (cdd.index < cdd.toc.last) ? lut_BCD_16[cdd.index + 1] : 0x0A0A;
|
||||
scd.regs[0x3c>>1].w = 0x0000;
|
||||
scd.regs[0x3e>>1].w = 0x0000;
|
||||
scd.regs[0x40>>1].byte.h = 0x00;
|
||||
/* update status (RS1-RS8 unchanged) */
|
||||
cdd.status = scd.regs[0x38>>1].byte.h = CD_PLAY;
|
||||
break;
|
||||
}
|
||||
|
||||
case 0x08: /* Forward Scan */
|
||||
{
|
||||
/* reset scanning direction / speed */
|
||||
cdd.scanOffset = CD_SCAN_SPEED;
|
||||
cdd.status = CD_SCAN;
|
||||
scd.regs[0x38>>1].w = (CD_SCAN << 8) | 0x02;
|
||||
scd.regs[0x3a>>1].w = (cdd.index < cdd.toc.last) ? lut_BCD_16[cdd.index + 1] : 0x0A0A;
|
||||
scd.regs[0x3c>>1].w = 0x0000;
|
||||
scd.regs[0x3e>>1].w = 0x0000;
|
||||
scd.regs[0x40>>1].byte.h = 0x00;
|
||||
|
||||
/* update status (RS1-RS8 unchanged) */
|
||||
cdd.status = scd.regs[0x38>>1].byte.h = CD_SCAN;
|
||||
break;
|
||||
}
|
||||
|
||||
case 0x09: /* Rewind Scan */
|
||||
{
|
||||
/* reset scanning direction / speed */
|
||||
cdd.scanOffset = -CD_SCAN_SPEED;
|
||||
cdd.status = CD_SCAN;
|
||||
scd.regs[0x38>>1].w = (CD_SCAN << 8) | 0x02;
|
||||
scd.regs[0x3a>>1].w = (cdd.index < cdd.toc.last) ? lut_BCD_16[cdd.index + 1] : 0x0A0A;
|
||||
scd.regs[0x3c>>1].w = 0x0000;
|
||||
scd.regs[0x3e>>1].w = 0x0000;
|
||||
scd.regs[0x40>>1].byte.h = 0x00;
|
||||
|
||||
/* update status (RS1-RS8 unchanged) */
|
||||
cdd.status = scd.regs[0x38>>1].byte.h = CD_SCAN;
|
||||
break;
|
||||
}
|
||||
|
||||
|
||||
case 0x0a: /* ??? (usually sent before first & last CD_PLAY command) */
|
||||
case 0x0a: /* N-Track Jump Control ? (usually sent before CD_SEEK or CD_PLAY commands) */
|
||||
{
|
||||
/* TC3 corresponds to seek direction (00=forward, FF=reverse) */
|
||||
/* TC4-TC7 are related to seek length (4x4 bits i.e parameter values are between -65535 and +65535) */
|
||||
/* Maybe related to number of auto-sequenced track jumps/moves for CD DSP (cf. CXD2500BQ datasheet) */
|
||||
/* also see US Patent nr. 5222054 for a detailled description of seeking operation using Track Jump */
|
||||
|
||||
/* no audio track playing */
|
||||
scd.regs[0x36>>1].byte.h = 0x01;
|
||||
|
||||
/* RS0-RS8 values taken from Gens */
|
||||
/* update status */
|
||||
cdd.status = CD_READY;
|
||||
scd.regs[0x38>>1].w = CD_READY << 8;
|
||||
|
||||
/* unknown RS0-RS8 values (returning 0xF in RS1 invalidates track infos usually returned in RS2-RS8) */
|
||||
scd.regs[0x38>>1].w = (CD_READY << 8) | 0x0f;
|
||||
scd.regs[0x3a>>1].w = 0x0000;
|
||||
scd.regs[0x3c>>1].w = 0x0001;
|
||||
scd.regs[0x3e>>1].w = 0x0001;
|
||||
scd.regs[0x40>>1].w = ~(CD_READY + 2) & 0x0f;
|
||||
scd.regs[0x3c>>1].w = 0x0000;
|
||||
scd.regs[0x3e>>1].w = 0x0000;
|
||||
scd.regs[0x40>>1].w = ~(CD_READY + 0xf) & 0x0f;
|
||||
return;
|
||||
}
|
||||
|
||||
@ -1346,7 +1350,10 @@ void cdd_process(void)
|
||||
/* no audio track playing */
|
||||
scd.regs[0x36>>1].byte.h = 0x01;
|
||||
|
||||
/* update status */
|
||||
cdd.status = cdd.loaded ? CD_STOP : NO_DISC;
|
||||
|
||||
/* RS1-RS8 ignored, expects 0x0 ("no disc" ?) in RS0 once */
|
||||
scd.regs[0x38>>1].w = 0x0000;
|
||||
scd.regs[0x3a>>1].w = 0x0000;
|
||||
scd.regs[0x3c>>1].w = 0x0000;
|
||||
@ -1364,12 +1371,13 @@ void cdd_process(void)
|
||||
/* no audio track playing */
|
||||
scd.regs[0x36>>1].byte.h = 0x01;
|
||||
|
||||
/* update status (RS1-RS8 ignored) */
|
||||
cdd.status = CD_OPEN;
|
||||
scd.regs[0x38>>1].w = 0x0e00;
|
||||
scd.regs[0x38>>1].w = CD_OPEN << 8;
|
||||
scd.regs[0x3a>>1].w = 0x0000;
|
||||
scd.regs[0x3c>>1].w = 0x0000;
|
||||
scd.regs[0x3e>>1].w = 0x0000;
|
||||
scd.regs[0x40>>1].w = 0x0001;
|
||||
scd.regs[0x40>>1].w = ~CD_OPEN & 0x0f;
|
||||
|
||||
#ifdef CD_TRAY_CALLBACK
|
||||
CD_TRAY_CALLBACK
|
||||
|
@ -48,7 +48,7 @@
|
||||
#define CD_SEEK 0x02
|
||||
#define CD_SCAN 0x03
|
||||
#define CD_READY 0x04
|
||||
#define CD_OPEN 0x05
|
||||
#define CD_OPEN 0x05 /* similar to 0x0E ? */
|
||||
#define CD_STOP 0x09
|
||||
#define CD_END 0x0C
|
||||
|
||||
|
Loading…
Reference in New Issue
Block a user