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Saturn: CD fixes

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-adjust max seek delay (Astal stage1)
-minimum seek time when the old and new positions are close (Sonic R retry race)
This commit is contained in:
Sergiy Dvodnenko
2025-12-29 18:43:57 +02:00
committed by GitHub
parent e07dd83858
commit 8ee3c51519
1 changed files with 11 additions and 6 deletions
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17
support/saturn/saturncdd.cpp
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@@ -502,12 +502,15 @@ int satcdd_t::CalcSeekDelay(int lba_old, int lba_new)
int diff = lba_new - lba_old;
int n = diff / 2000;
if (n <= min) n = min;
if (abs(diff) <= 4) n = 2;
else if (n <= min) n = min;
else if (n > max) n = max;
if (track_old != track_new) n += 27;
else if (abs(diff) > 10000) n += 20;
if (diff < 0) n += 2;
if (diff < -4) n += 2;
return n;
}
@@ -631,7 +634,9 @@ void satcdd_t::CommandExec() {
#endif // SATURN_DEBUG
break;
case SATURN_COMM_SEEK:
case SATURN_COMM_SEEK: {
int lba_old = this->lba;
this->seek_lba = fad - 150;
this->lba = fad - 150;
@@ -639,8 +644,7 @@ void satcdd_t::CommandExec() {
this->index = this->toc.GetIndexByLBA(this->track, this->seek_lba);
this->seek_pend = true;
this->seek_delay = 7;
this->final_read = this->read_pend;
this->seek_delay = CalcSeekDelay(lba_old - 4, fad - 150);
this->read_pend = false;
this->pause_pend = false;
this->speed = comm[10] == 1 ? 1 : 2;
@@ -654,6 +658,7 @@ void satcdd_t::CommandExec() {
//printf(", command = %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X", comm[0], comm[1], comm[2], comm[3], comm[4], comm[5], comm[6], comm[7], comm[8], comm[9], comm[10], comm[11]);
printf(" (%u)\n\x1b[0m", saturn_frame_cnt);
#endif // SATURN_DEBUG
}
break;
default:
@@ -764,7 +769,7 @@ void satcdd_t::Process(uint8_t* time_mode) {
#endif // SATURN_DEBUG
}
else if (this->seek_pend) {
this->state = this->final_read ? Read : Seek;
this->state = Seek;
LBAToMSF(this->lba + 150, &amsf);
if (this->lba < 0)