Search found 594 matches

by cdifan
Fri Sep 01, 2017 8:40 pm
Forum: Philips CD-i Forum
Topic: Dimo's Quest password recovery
Replies: 3
Views: 16583

Re: Dimo's Quest password recovery

Here are some comment from the sources of dimopass : Motivation and basic algorithm. The Dimo's Quest CD-i title issues level passwords after each completed level. By entering this password, the user can start directly at the next level. The list of passwords is different for each CD-i player, becau...
by cdifan
Fri Sep 01, 2017 3:13 am
Forum: Philips CD-i Forum
Topic: Dimo's Quest password recovery
Replies: 3
Views: 16583

Dimo's Quest password recovery

It appears that the pressed Dimo's Quest does not have a cheat mode. From the Decoding CD-i audio files thread: .. no cheat mode .. Aww. Dimo is one of the best games out there, but with the randomly generated passwords it's only really playable with a fully working (no dead TimeKeeper) console. Lea...
by cdifan
Wed Aug 30, 2017 10:23 pm
Forum: Philips CD-i Forum
Topic: Decoding CD-i audio files
Replies: 25
Views: 84796

Re: Decoding CD-i audio files

Froggy Dimo is in there. They did rework the sprite into a (what I call) red crocodile: http://www.shikotei.com/tmp/cdi/DimosQuest - gfxset1 - RedCroc.gif Do you know if this was actually used in the game? There's a different "red crocodile" monster in the gfxset (7 positions to the right of Dimo)....
by cdifan
Tue Aug 29, 2017 9:13 pm
Forum: Philips CD-i Forum
Topic: Decoding CD-i audio files
Replies: 25
Views: 84796

Re: Decoding CD-i audio files

... level map images for The Apprentice and Dimo's Quest ... I've had plans to do this for years and years, but just never got around to it... Very nice. Thank you! Thank you! One little detail I noticed: in the Dimo's Quest maps, you still have little frog Dimo: http://www.cdiemu.org/img/frog_dimo...
by cdifan
Mon Aug 28, 2017 7:49 pm
Forum: Philips CD-i Forum
Topic: Decoding CD-i audio files
Replies: 25
Views: 84796

Re: Decoding CD-i audio files

Those CD-DA files were extracted years 'n years ago (early '00s) and have been extensively listened to (still are). Same here, my mp3 files for The Apprentice are dated September 2001 :) They are still on my phone, I listened to them all just last week (I actually have all the Vision Factory audio ...
by cdifan
Sat Aug 26, 2017 10:23 pm
Forum: Philips CD-i Forum
Topic: Decoding CD-i audio files
Replies: 25
Views: 84796

Re: Decoding CD-i audio files

Next I will be taking a look at Dimo's Quest... Now that was really easy... Simply extracting all the .blk files, hexdumping them and using a few search patterns in vim quickly found all the sound effects in block 2 of the big.blk file in the RTF subdirectory of Dimo's Quest, using the exact same d...
by cdifan
Sat Aug 26, 2017 9:18 pm
Forum: Philips CD-i Forum
Topic: Decoding CD-i audio files
Replies: 25
Views: 84796

Re: Decoding CD-i audio files

I couldn't help myself and wrote a little tool today: C:\Tmp>apprsfx Usage: apprsfx levelN.dat Function: Extracts The Apprentice sound effects from level data Raw sound effect data is written to effectN_M.raw Written by CD-i Fan <cdifan@gmail.com> It is based on reverse-engineering the code that mix...
by cdifan
Sat Aug 26, 2017 1:40 pm
Forum: Philips CD-i Forum
Topic: Decoding CD-i audio files
Replies: 25
Views: 84796

Re: Decoding CD-i audio files

The sound parameters indicate that only half the filter and range parameters are set. The data samples are all ranging from 0x00 to 0x0F (using hex editor, so there's no mistaking it).. indicating that there really is no data in the other channel. Why? Why store a single channel in a stereo format?...
by cdifan
Tue Aug 22, 2017 9:57 pm
Forum: Philips CD-i Forum
Topic: Decoding CD-i audio files
Replies: 25
Views: 84796

Re: Decoding CD-i audio files

Okay, I think you've almost got it so giving you actual code should not be considered cheating. Here's C++ source from CD-i Emulator for playing a 4-bit sound unit: /** Plays 4-bit sound unit. * * @param pChannel Audio channel. * @param bParam Sound parameter byte. * @param pbData Sound unit data. *...
by cdifan
Sat Aug 19, 2017 12:11 pm
Forum: Philips CD-i Forum
Topic: Decoding CD-i audio files
Replies: 25
Views: 84796

Re: Decoding CD-i audio files

The Green Book makes for excellent bedtime reading, though :)
by cdifan
Fri Aug 18, 2017 4:21 pm
Forum: Philips CD-i Forum
Topic: Decoding CD-i audio files
Replies: 25
Views: 84796

Re: Decoding CD-i audio files

Shikotei wrote:
Fri Aug 18, 2017 11:50 am
The only format that the book mentions that could be in an audio sector is CD-DA 16bit at 44.1kHz (IV.2.F2).
You probably mean: "The only OTHER format ..."

And even that's not really true; MPEG Audio sectors are described in IX.5.2.
by cdifan
Fri Aug 18, 2017 4:20 pm
Forum: Philips CD-i Forum
Topic: Decoding CD-i audio files
Replies: 25
Views: 84796

Re: Decoding CD-i audio files

actually, decoding a single 18-byte soundgroup, of which there are 128 in a 2304-byte audio sector I think you mean "a single 128-byte soundgroup, of which there are 18 in a 2304-byte audio sector". Ye old switcharoo, but inconsistent data is not something I'd let go uncorrected. You are right of c...
by cdifan
Thu Aug 17, 2017 10:04 pm
Forum: Homebrew Forum
Topic: Microware OS-9 Manuals
Replies: 2
Views: 13742

Re: Microware OS-9 Manuals

These manuals are now also available from ICDIA in the Microware OS-9 Documentation section.
by cdifan
Thu Aug 17, 2017 9:35 pm
Forum: Philips CD-i Forum
Topic: Decoding CD-i audio files
Replies: 25
Views: 84796

Re: Decoding CD-i audio files

What you are describing above is helpful for understanding, but it's identical (except for the omission of Level A) to the CD-XA standards. Decoding for that audio format most certainly exists out there, see e.g. MESS, FFmpeg, and many other sources (I could provide sample code but it is already out...
by cdifan
Wed Aug 16, 2017 10:31 pm
Forum: Philips CD-i Forum
Topic: The Apprentice Regional Variations
Replies: 4
Views: 15974

Re: The Apprentice Regional Variations

There are no differences in the actual data bits between the EU and US versions.
The only difference is in the packaging and the mastering (leadin and leadout areas).

PS. I have both discs and checked this.