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user7 wrote:Here is the beginning of Track 1 of Prelude

It's normal. I dumped "Caesar's Boxing (USA) (Demo)", "Dimo's Quest (Europe)", "Dimo's Quest (USA)", "Zenith (Europe)", "American Fork Art no Sekai (Japan)". The scrambled 1st sectors of these discs are the same as "Prelude".

Thank you, please submit dumps if you can.

More CDi quirks:
Do you know why this one has so many errors?
/viewtopic.php?t=26432 … demo-disc/

Also there is strange behavior with Alien Gate but there are reproductions on the market so someone else was able to copy it. I have bought one, coming in the mail to inspect /viewtopic.php?t=26519 … e-dumping/

user7 wrote:Do you know why this one has so many errors?

I saw this pattern for the first time.

At least, there are 4 patterns for the CD-i.
1. single track and non-pregap in the 1st track and fulltoc says CD-I (normal CD-i or CD-i DV disc)
2. multi-track and non-pregap in the 1st track and fulltoc says CD-I (some CD-i DV disc? /viewtopic.php?t=26432 … emo-disc/)
3. multi-track and pregap exists in the 1st track and fulltoc says CDDA (normal CD-i ready disc. Dimo's Quest (Europe)
https://redump.info/disc/35804/ etc.)
4. multi-track and pregap exists in the 1st track and fulltoc says CD-I (some CD-i ready disc? (I only know Dimo's Quest (USA))

2. is not supported yet.

Possible to have a look at these logs? https://drive.google.com/file/d/1pM0Kmb … sp=sharing

It came with CDi discs but is called "Photo CD Sample Disc" and has .PCD files. But only one track. No c2 errors and dump matches isobuster. But has Sub errors.

user7 wrote:Fireball says this bug must be fixed /viewtopic.php?t=17759 … mos-quest/

DIC is dumping scrambled now, previously it did not dump scrambled (Dimo's Quest Europe).

This bug exists since sometime before 20190326, whenever DIC stopped outputting to SCM.

I was confused with its .cue, which says the track is CDI (= MODE2/2352) instead of audio, thought it was descrambled. I've never seen the actual image.

sarami wrote:At least, there are 4 patterns for the CD-i.

CD-i Bridge (Video CD, Photo CD) and Rainbow CD discs are also CD-i, they have different 'patterns'.

F1ReB4LL wrote:CD-i Bridge (Video CD, Photo CD)

Ah, yes.
5. multi-track and non-pregap in the 1st track and fulltoc says CD-ROM XA (normal Video CD, Photo CD)

F1ReB4LL wrote:Rainbow CD discs

I assume it's 2. Because "The Cranberries" has multi-track and non-pregap in the 1st track and fulltoc says CD-I.
To test, I ordered it by Amazon.com

sarami wrote:To test, I ordered it by Amazon.com

Amazon also has a CD-MIDI disc if you still don't have one - https://www.amazon.com/dp/B0009I8K9G
https://www.journaldulapin.com/2019/01/ … dden-midi/ - article

F1ReB4LL wrote:

sarami wrote:To test, I ordered it by Amazon.com

Amazon also has a CD-MIDI disc if you still don't have one - https://www.amazon.com/dp/B0009I8K9G
https://www.journaldulapin.com/2019/01/ … dden-midi/ - article

Already bought it in August. I also used WinUAE and connected USB to MIDI port via Sony MDM-X4, but didn't hear the MIDI sound. Sub R..W of this disc channels have almost CD+G, not CD-MIDI.

sarami wrote:I moved the scrambled sector to _maininfo.txt
LBA 0 to 4 has offset 3540 and LBA 6 to 10 has offset 3652.

Everything is fine with Sangokushi, btw, sectors -150 to -1 have offset 3652, then it goes a piece of garbage data, then it goes a user data area (sector 0 and further) with offset 3540, so it has a problem in its pregap similar to Saturn +588/+1176 discs and Gulf War/Lip 3, it's not like Mega CD Silpheed demo with user data area issues.

F1ReB4LL wrote:sectors -150 to -1 have offset 3652, then it goes a piece of garbage data, then it goes a user data area (sector 0 and further) with offset 3540

sectors -150 to -1 have offset 3540, then it goes a piece of garbage data, then it goes a user data area (sector 0 and further) with offset 3652