1 (edited by Jackal 2018-02-19 18:55:15)

Topic: PS2 cheat discs w/ copy protection

TossEAC sent me a message about this disc: https://www.amazon.co.uk/GT-Circuit-Bre … B0000902CC

It's a PS2 cheat disc that seems to have some kind of copy protection. The data track has 4361 errors. When replacing them with standard 0x55 error sectors (with mode2 header), I get the following hashes:

<rom name="Image.bin" size="761692848" crc="44bcdd2d" md5="9aaa25ff944ead8777e9d8fa0784b185" sha1="49fa480165425828f10d2348cb89f28239d413a1"/>

I guess TossEAC could try to dump the disc with CDM or CloneCD on a non-Plextor drive. If the resulting dump has the same error count then it's probably correct.

The confusing part however is the cuesheet. 3 different tools produce 3 different cuesheets:

DIC:

FILE "Image.bin" BINARY
  TRACK 01 MODE2/2352
    INDEX 00 00:00:00
    INDEX 01 225:231:225
    INDEX 02 00:00:02

CloneCD:

FILE "Image.bin" BINARY
   TRACK 01 MODE2/2352
   INDEX 01 00:00:00
   INDEX 02 31:25:33

and Sub2cue:

FILE "Image.bin" BINARY
  TRACK 01 MODE2/2352
    INDEX 00 31:25:31
    INDEX 01 00:00:00
    INDEX 02 31:25:33

Can anyone check which of those 3 (if any) is correct? Here's the DIC .sub: http://www119.zippyshare.com/v/LQLgnTQk/file.html .. or possibly a Subdump .sub is needed.

Re: PS2 cheat discs w/ copy protection

I have several PS1 and PS2 cheat discs as well as other unlicensed discs.
A long time ago I remember trying to dump them all, and many gave me this kind of trouble. From the top of my head I remember the following:
Breaker Pro
HD Advance
USB eXtreme

Funny thing is: most of these problematic discs, I could just copy their contents and use them elsewhere, but never found a way to make a proper dump.
I don't have a Plextor drive, but will gladly try anyway to dump with various apps and get back with my findings.

3 (edited by reentrant 2018-03-06 22:45:52)

Re: PS2 cheat discs w/ copy protection

None of the CUEs are correct. There's a malicious index injected (next index is smaller than previous index) in the middle of the track.

CUE: That format can't handle such things: https://web.archive.org/web/20160201021 … et/syntax/

CCD: CloneCD dumps always contain the .SUB file, .CCD file contains only the TOC, the index stuff is inside the .SUB: http://forum.redump.org/topic/12357/cdr … fications/
CDD should be able to handle such discs because Index data is inside subs.

MDS: The same as CCD.

Summary: Bins are correct and should be preserved. The problem is with CUEs. I'd ignore them for a moment and archive the subs or post relevant info in the comments...

Also Plextor is advised for such discs (I am not sure how normal drives behave when they read such weird discs)...

4 (edited by tossEAC 2018-03-08 02:56:53)

Re: PS2 cheat discs w/ copy protection

I dumped it again with c2 errors set to 0, and got these hashes.

<rom name="Image.bin" size="761692848" crc="5de7d79a" md5="d04ec2bc7e3e7fa57a46741a48d8760a" sha1="d56b95bb6f160132f119319658a8e5b11008f7fd" />

the first time with c2 set to  10, I got different hashes,

    <rom name="Image.bin" size="761692848" crc="78065c38" md5="c9edb6da2cab63628d10ed4a510784b2" sha1="ff99fde7260d42a79eaf91d2b8597e9125c34404" />

I dumped it yet again with c2 errors set to 0, and got these hashes.

    <rom name="Image.bin" size="761692848" crc="432f9585" md5="3dcfa951cf9f2050c931a2857b8b0c81" sha1="4bfae26b77141632f3ecc5b31a9ab818515ebbad" />

So definitely no consistent result.

He who controls the SPICE... controls the UNIVERSE!
The SPICE must flow.

Re: PS2 cheat discs w/ copy protection

oh and I cleaned the disc as the surface was a bit coated, with probably fine particles of nicotine, jackal let me know if you can look at this new dump, and replace the error sectors and see what you get.

He who controls the SPICE... controls the UNIVERSE!
The SPICE must flow.

Re: PS2 cheat discs w/ copy protection

What's the cdmage error count on those 3 dumps?

No point in adding this dump unless we can get consistent results.