+// timing used in this function was taken from tests on real hardware
+// (yes it's slow, but you probably don't want to modify it)
+void cdrLidSeekInterrupt(void)
+{
+ switch (cdr.DriveState) {
+ default:
+ case DRIVESTATE_STANDBY:
+ StopCdda();
+ StopReading();
+ SetPlaySeekRead(cdr.StatP, 0);
+
+ if (CDR_getStatus(&stat) == -1)
+ return;
+
+ if (stat.Status & STATUS_SHELLOPEN)
+ {
+ cdr.DriveState = DRIVESTATE_LID_OPEN;
+ CDRLID_INT(0x800);
+ }
+ break;
+
+ case DRIVESTATE_LID_OPEN:
+ if (CDR_getStatus(&stat) == -1)
+ stat.Status &= ~STATUS_SHELLOPEN;
+
+ // 02, 12, 10
+ if (!(cdr.StatP & STATUS_SHELLOPEN)) {
+ cdr.StatP |= STATUS_SHELLOPEN;
+
+ // could generate error irq here, but real hardware
+ // only sometimes does that
+ // (not done when lots of commands are sent?)
+
+ CDRLID_INT(cdReadTime * 30);
+ break;
+ }
+ else if (cdr.StatP & STATUS_ROTATING) {
+ cdr.StatP &= ~STATUS_ROTATING;
+ }
+ else if (!(stat.Status & STATUS_SHELLOPEN)) {
+ // closed now
+ CheckCdrom();
+
+ // cdr.StatP STATUS_SHELLOPEN is "sticky"
+ // and is only cleared by CdlNop
+
+ cdr.DriveState = DRIVESTATE_RESCAN_CD;
+ CDRLID_INT(cdReadTime * 105);
+ break;
+ }
+
+ // recheck for close
+ CDRLID_INT(cdReadTime * 3);
+ break;
+
+ case DRIVESTATE_RESCAN_CD:
+ cdr.StatP |= STATUS_ROTATING;
+ cdr.DriveState = DRIVESTATE_PREPARE_CD;
+
+ // this is very long on real hardware, over 6 seconds
+ // make it a bit faster here...
+ CDRLID_INT(cdReadTime * 150);
+ break;
+
+ case DRIVESTATE_PREPARE_CD:
+ cdr.StatP |= STATUS_SEEK;
+
+ cdr.DriveState = DRIVESTATE_STANDBY;
+ CDRLID_INT(cdReadTime * 26);
+ break;
+ }
+}
+
+static void Find_CurTrack(const u8 *time)
+{
+ int current, sect;
+
+ current = msf2sec(time);
+
+ for (cdr.CurTrack = 1; cdr.CurTrack < cdr.ResultTN[1]; cdr.CurTrack++) {
+ CDR_getTD(cdr.CurTrack + 1, cdr.ResultTD);
+ sect = fsm2sec(cdr.ResultTD);
+ if (sect - current >= 150)
+ break;
+ }
+}
+
+static void generate_subq(const u8 *time)
+{
+ unsigned char start[3], next[3];
+ unsigned int this_s, start_s, next_s, pregap;
+ int relative_s;
+
+ CDR_getTD(cdr.CurTrack, start);
+ if (cdr.CurTrack + 1 <= cdr.ResultTN[1]) {
+ pregap = 150;
+ CDR_getTD(cdr.CurTrack + 1, next);
+ }
+ else {
+ // last track - cd size
+ pregap = 0;
+ next[0] = cdr.SetSectorEnd[2];
+ next[1] = cdr.SetSectorEnd[1];
+ next[2] = cdr.SetSectorEnd[0];
+ }
+
+ this_s = msf2sec(time);
+ start_s = fsm2sec(start);
+ next_s = fsm2sec(next);
+
+ cdr.TrackChanged = FALSE;
+
+ if (next_s - this_s < pregap) {
+ cdr.TrackChanged = TRUE;
+ cdr.CurTrack++;
+ start_s = next_s;
+ }
+
+ cdr.subq.Index = 1;
+
+ relative_s = this_s - start_s;
+ if (relative_s < 0) {
+ cdr.subq.Index = 0;
+ relative_s = -relative_s;
+ }
+ sec2msf(relative_s, cdr.subq.Relative);
+
+ cdr.subq.Track = itob(cdr.CurTrack);
+ cdr.subq.Relative[0] = itob(cdr.subq.Relative[0]);
+ cdr.subq.Relative[1] = itob(cdr.subq.Relative[1]);
+ cdr.subq.Relative[2] = itob(cdr.subq.Relative[2]);
+ cdr.subq.Absolute[0] = itob(time[0]);
+ cdr.subq.Absolute[1] = itob(time[1]);
+ cdr.subq.Absolute[2] = itob(time[2]);
+}
+
+static void ReadTrack(const u8 *time) {
+ unsigned char tmp[3];
+ struct SubQ *subq;
+ u16 crc;
+
+ tmp[0] = itob(time[0]);
+ tmp[1] = itob(time[1]);
+ tmp[2] = itob(time[2]);
+
+ if (memcmp(cdr.Prev, tmp, 3) == 0)
+ return;
+
+ CDR_LOG("ReadTrack *** %02x:%02x:%02x\n", tmp[0], tmp[1], tmp[2]);
+
+ cdr.NoErr = CDR_readTrack(tmp);
+ memcpy(cdr.Prev, tmp, 3);
+
+ if (CheckSBI(time))
+ return;
+
+ subq = (struct SubQ *)CDR_getBufferSub();
+ if (subq != NULL && cdr.CurTrack == 1) {
+ crc = calcCrc((u8 *)subq + 12, 10);
+ if (crc == (((u16)subq->CRC[0] << 8) | subq->CRC[1])) {
+ cdr.subq.Track = subq->TrackNumber;
+ cdr.subq.Index = subq->IndexNumber;
+ memcpy(cdr.subq.Relative, subq->TrackRelativeAddress, 3);
+ memcpy(cdr.subq.Absolute, subq->AbsoluteAddress, 3);
+ }
+ else {
+ CDR_LOG_I("subq bad crc @%02x:%02x:%02x\n",
+ tmp[0], tmp[1], tmp[2]);
+ }
+ }
+ else {
+ generate_subq(time);
+ }
+
+ CDR_LOG(" -> %02x,%02x %02x:%02x:%02x %02x:%02x:%02x\n",
+ cdr.subq.Track, cdr.subq.Index,
+ cdr.subq.Relative[0], cdr.subq.Relative[1], cdr.subq.Relative[2],
+ cdr.subq.Absolute[0], cdr.subq.Absolute[1], cdr.subq.Absolute[2]);
+}
+
+static void AddIrqQueue(unsigned short irq, unsigned long ecycle) {
+ if (cdr.Irq != 0) {
+ if (irq == cdr.Irq || irq + 0x100 == cdr.Irq) {
+ cdr.IrqRepeated = 1;
+ CDR_INT(ecycle);
+ return;
+ }
+
+ CDR_LOG_I("cdr: override cmd %02x -> %02x\n", cdr.Irq, irq);
+ }