experimental hdl dual layer support

[crazyc]

This is an experimental patch which adds dual layer disk support to hdloader. It implements CdDualLayerInfo and CdLayerSearchFile, but the only game i've tried it with is God of War, which doen't require LayerSearchFile. Two caveats, it requires a new value in the header and the mode related to dual layer support no longer works. Offset 0xe8 of the header, between the executable file name and the disk type, needs to be set to the sector address of the second layer PVD - 16.

Edit: revised patch
Edit2: 5/10 revised patch

[Dark_Killer]

wow, just wow.

[thereal_zap]

a couple things...

i'm assuming you patch an already decrypted hdl and not toxic 0.2 patched version.

patching the header is no problem. i'm sure if this works, then the author's of hdl_dump and winhiip will add support for it.

good job too btw!

i'll be the first to say thank you

[EntwinedWS]

So we just apply this IPS patch to the HDLoader ELF? Thanks for all your contributions by the way. Another question..this should allow me to install Xenosaga straight to my hard drive via the PS2 without flattening right?

[FranktheBunny]

Originally Posted by EntwinedWS

So we just apply this IPS patch to the HDLoader ELF? Thanks for all your contributions by the way. Another question..this should allow me to install Xenosaga straight to my hard drive via the PS2 without flattening right?

In theory, yes.

[red_icculus]

Should this be applied to the unpacked HDL?

[dlanor]

Originally Posted by crazyc

Two caveats, it requires a new value in the header and the mode related to dual layer support no longer works.

I'm not sure, but wasn't that mode needed to allow ISOs to be larger than a DVD5 ? That will still be needed for the new dual layer usage.
So, does the new code simply replace the functionality of mode 2 (in addition to the two new functions), thus making that mode unnecessary ?

Offset 0xe8 of the header, between the executable file name and the disk type, needs to be set to the sector address of the second layer PVD - 16.

Is that something which the patched HDL can do automatically, when installing an ISO of this size/type ? Or will it be necessary for each user to somehow edit that header ? If so, how do you suggest it best be done ?

Finally, though you don't mention it, I assume your solution still requires ISOs to be 'flattened' on a PC and installed by the third-party installers like WinHiip, since full DL support for the built-in installer would require much more extensive coding/rewrite. Is that correct ?

Best regards: dlanor

[crazyc]

Originally Posted by dlanor

I'm not sure, but wasn't that mode needed to allow ISOs to be larger than a DVD5 ? That will still be needed for the new dual layer usage.
So, does the new code simply replace the functionality of mode 2 (in addition to the two new functions), thus making that mode unnecessary ?

Yes, the mode just returned 1 in the first parameter of sceCdDualLayerInfo. I changed it to return 1 if the layer break address is nonzero.

Originally Posted by dlanor

Is that something which the patched HDL can do automatically, when installing an ISO of this size/type ? Or will it be necessary for each user to somehow edit that header ? If so, how do you suggest it best be done ?

Hdloader cannot do this automatically. Hdl_dump or winhiip should be able to be modified to do it.

Originally Posted by dlanor

Finally, though you don't mention it, I assume your solution still requires ISOs to be 'flattened' on a PC and installed by the third-party installers like WinHiip, since full DL support for the built-in installer would require much more extensive coding/rewrite. Is that correct ?

Yes. I'll try and make a patch for hdl_dump later.

[v1p3r]

Wow, the current hacks are impressive but that's just insane...

[AngryGir]

How do we apply this? Failing a good explanation, a GUI would be appreciated.

[EntwinedWS]

You should be able to use this program attached to apply the IPS patch. I've used it in the past for IPS translations on Japanese PS2 games to make them English.

[v1p3r]

Will this report the layers correctly, to allow GT4 to work?

[AngryGir]

Thanks

should we apply it on the packed or unpacked elf? and can it be applied on an already modified elf? Great work once again mate! Respect.

[Lifegrind]

Nice work.

[Jaybez]

used Jips to apply the patch but hdl reports gt4 pal as 3gb, installing anyway to see what happens.

[neo333]

but just as many people in this forum are asking is it the unpacked elf or the packed one. Also can it be also applied to the toxic os core version

[Illicious]

Great work. Will test it out soon.

[paulodeleo]

There are no patchs made for compressed elfs, so patch the unpacked one.

[neo333]

thanks