[SLUS-00152] Tomb Raider (Collectors' Edition)

[themabus]

hi
thank you very much for accepting my registration

i know Tomb Raider has been discussed a lot
but looks like this one problem still got by somehow
it's only with Collectors' Edition release
one having Chicken Run and Time Splitters bonus videos
it's indexed as v1.6 on redump.org
i know this might sounds a lot like bad CD, but no, really it isn't

problem is that game requests particular sector and then checks subcode
it does this twice, once sector is requested in data mode and afterwards as audio
both times subcode is checked and game loops until it matches requested position
so if subcode does not match, game appears to freeze, looping forever
i had this issue with my CD plugin and it turned out that 96 byte subcode frame was decoded twice, once on each request
and 2nd decode would in fact destroy already decoded frame

2010.11.30 16:30:41 CDRreadTrack (208650)
Cache miss! Caching...
2010.11.30 16:30:41 CDRgetBuffer
2010.11.30 16:30:41 CDRgetBufferSub <- 1st time - decode subcode
011201-000000-00-462400-27DF CRC Ok
2010.11.30 16:30:41 CDRgetBufferSub
...
2010.11.30 16:30:41 CDRgetBufferSub
2010.11.30 16:30:41 CDRgetTE (57)
LBA: 281654
2010.11.30 16:30:41 CDRreadCDDA (208650)
2010.11.30 16:30:41 CDRgetBufferSub <- 2nd time - destroy subcode
FFF011-000000-00-000000-0000 CRC Error
2010.11.30 16:30:41 CDRgetBufferSub
2010.11.30 16:30:41 CDRgetBufferSub
2010.11.30 16:30:41 CDRgetBufferSub

i've included memory card with save right at position where this happens
you have to turn around and walk into a room and flip switch
when you do this first time middle door will open
and creepy music should proceed to play, but it won't
and if you flip switch again now, game will freeze


other releases of game request two different sectors here
and so they work fine
it's strange why those changes to late release were made

i've tested with several BIOSes, so it couldn't be it
and i fixed my plugin now and it works fine
so problem with this emulator could be something similar
if it is, there could be issues with other games
so i thought to let you know

also i tried to test 'subchannel Q only' reading mode
which i though should work, since decoding wouldn't be done
i tried it with Daemon Tools Lite and Alcohol 52 virtual drives
and both times game didn't work at all
music would squeak and game freeze when loading save
so something might be wrong there too

best of luck

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[psicomaniaco]

This is the support forum for "pSX Emulator" only. Considering that you are using Xebra, I can't help you there, since I've never used it.

Why don't you try using "pSX Emulator"? This game works nice in it. But keep in mind that Tomb Raider requires a VERY well made image dump.


(*Sign*... pSX has the worst and most useless name I've ever seen on a emulator... )

[themabus]

no, no, i do use both emulators, pSX is indeed great emulator
those screenshots are from Xebra because i reported it to Xebra author initially but also pSX have same problem
i know it's weird, but maybe not so much since my plugin had same issue too and maybe some other plugin has it
it's only this one single release that's affected, rest work great
but not bad sectors, those requested are audio sectors and subcode is recreated by virtual drive
this release works correct from same image/virtual drive for example with SaPu plugin

[themabus]

this has been fixed in Xebra now
though cause turned out to be different from plugin

In Xebra, the reason of this problem is the hold time of CdlLocP(current position of header) while no reading.
Even if hanging in same place, I think your reason would be different.

maybe this could help

Happy Holidays

[xenorhino]

Hey everyone. Sorry to bring up an old thread, but this exact problem is happening to me, and I am using psxfin too, not xebra. Can anyone help out?