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CDVD: No rotational delay for seeks less than buffered sectors 

Fixes Shadow Hearts Covenant hangs
This commit is contained in:
refractionpcsx2 2021-12-12 06:33:01 +00:00
parent 6beac26727
commit 122968e63a
1 changed files with 15 additions and 4 deletions
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19
pcsx2/CDVD/CDVD.cpp
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@ -1244,7 +1244,7 @@ __fi void cdvdReadInterrupt()
if (cdvd.nextSectorsBuffered)
CDVDREAD_INT((cdvd.BlockSize / 4) * 12);
else
CDVDREAD_INT(cdvd.ReadTime + ((cdvd.BlockSize / 4) * 12));
CDVDREAD_INT((psxRegs.cycle - psxRegs.sCycle[IopEvt_CdvdSectorReady]) + ((cdvd.BlockSize / 4) * 12));
}
// Returns the number of IOP cycles until the event completes.
@ -1254,6 +1254,7 @@ static uint cdvdStartSeek(uint newsector, CDVD_MODE_TYPE mode)
uint delta = abs((s32)(cdvd.SeekToSector - cdvd.Sector));
uint seektime;
bool isSeeking = cdvd.nCommand == N_CD_SEEK;
cdvd.Ready &= ~(CDVD_DRIVE_READY | CDVD_DRIVE_DATARDY);
cdvd.Reading = 1;
@ -1291,6 +1292,7 @@ static uint cdvdStartSeek(uint newsector, CDVD_MODE_TYPE mode)
CDVD_LOG("CdSeek Begin > to sector %d, from %d - delta=%d [FAST]", cdvd.SeekToSector, cdvd.Sector, delta);
seektime = Cdvd_FastSeek_Cycles;
}
isSeeking = true;
}
else
{
@ -1331,13 +1333,20 @@ static uint cdvdStartSeek(uint newsector, CDVD_MODE_TYPE mode)
}
else
{
psxRegs.interrupt &= ~(1 << IopEvt_CdvdSectorReady);
cdvd.nextSectorsBuffered = 0;
if (delta < cdvd.nextSectorsBuffered)
{
isSeeking = false;
}
else
{
psxRegs.interrupt &= ~(1 << IopEvt_CdvdSectorReady);
cdvd.nextSectorsBuffered = 0;
}
}
}
// Only do this on reads, the seek kind of accounts for this and then it reads the sectors after
if (delta && cdvd.nCommand != N_CD_SEEK)
if (delta && !isSeeking)
{
int rotationalLatency = cdvdRotationalLatency((CDVD_MODE_TYPE)cdvdIsDVD());
//DevCon.Warning("%s rotational latency at sector %d is %d cycles", (cdvd.SpindlCtrl & CDVD_SPINDLE_CAV) ? "CAV" : "CLV", cdvd.SeekToSector, rotationalLatency);
@ -1345,6 +1354,8 @@ static uint cdvdStartSeek(uint newsector, CDVD_MODE_TYPE mode)
CDVDSECTORREADY_INT(seektime);
seektime += (cdvd.BlockSize / 4) * 12;
}
else if(cdvd.nCommand != N_CD_SEEK)
CDVDSECTORREADY_INT(seektime + ((cdvd.BlockSize / 4) * 12));
return seektime;
}