VOGONS


Reversing the Disney Sound Source

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Reply 41 of 138, by hard1k

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Hey, I would be interested too.

New sound card project: AWE64 Legacy
Please have a look at my wishlist (hosted at Amibay)

Reply 42 of 138, by shock__

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CD40105 variant added, component placement map added, custom Eagle library added & documentation updated.

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  • Filename
    dss_emu.zip
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    487.02 KiB
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    File comment
    Updated files (schematics, layout examples, documentation) for building a Disney Sound Source compatible circuit.
    File license
    Fair use/fair dealing exception

Current Project: new GUS PnP compatible soundcard

[Z?]

Reply 43 of 138, by shock__

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Just as a small finisher, a video showing the DSS emulator in action (sound recorded via line in on my main PC):
https://www.youtube.com/watch?v=EoGCf69QLJc&feature=youtu.be

Current Project: new GUS PnP compatible soundcard

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Reply 46 of 138, by shock__

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carlostex wrote:

I thought i remembered the guards screaming in Wolf 3D with my original DSS. I might be wrong though. Any kind of limitation with this design?

No, Wolf3D's sound engine is crap ... it's limited to outputing 1 sound with no software mixing ... so if a sound is playing already the new one is skipped.
That's why I waited before opening the door to Hans Grosse and closing the door before the "end sequence".

Actually ... seems like the truth is somewhere in between:
https://www.youtube.com/watch?v=kN30QELXiZw

Current Project: new GUS PnP compatible soundcard

[Z?]

Reply 47 of 138, by shock__

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Alone in the dark confirmed as working (it's "broken" in DOSBox [or rather not fixed since AITD's detection routine is stupid]), while Dungeon Master does NOT work.

EDIT: DM works with the -sd2 parameter

Current Project: new GUS PnP compatible soundcard

[Z?]

Reply 48 of 138, by shock__

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Dungeon Master detection routine confirmed working with the 74ALS232 variant (it's extremely picky about the timing, so one might have to re-adjust the variable resistor a few times)
http://i.imgur.com/bllkrgw.jpg

EDIT: Also works with the CD40105 variant ... or a mix between both ICs (as long as you keep the different signal levels for OE and RESET between both chips in mind). I guess this project can be considered a full success 😀

Current Project: new GUS PnP compatible soundcard

[Z?]

Reply 49 of 138, by matze79

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Thanks spend a bit of time to make one:

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http://www.dosforum.de/viewtopic.php?f=29&t=10210

Time to Test it 😀

https://www.youtube.com/watch?v=pnncFNkkI6s&f … player_embedded
https://www.youtube.com/watch?feature=player_ … d&v=LUCiWou-xcs

https://dosreloaded.de - The German Retro DOS PC Community
https://www.retroianer.de - under constructing since ever

Co2 - for a endless Summer

Reply 51 of 138, by stamasd

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Regarding the Covox/DSS, I see mentions of "mono", "stereo-on-1" and "stereo-on-2". Mono is obvious, and I think I figured what the "stereo-on-1" means. But I can't figure out what "stereo-on-2" is.

I/O, I/O,
It's off to disk I go,
With a bit and a byte
And a read and a write,
I/O, I/O

Reply 52 of 138, by Jepael

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stamasd wrote:

Regarding the Covox/DSS, I see mentions of "mono", "stereo-on-1" and "stereo-on-2". Mono is obvious, and I think I figured what the "stereo-on-1" means. But I can't figure out what "stereo-on-2" is.

Two mono covoxes on two LPT ports.

But I have to add that while Covox and DSS are both LPT port DACs, they are completely different and not compatible. Samples need to be written to DSS with a load strobe and they go into 16 sample FIFO that can signal when it's full and samples are played back at fixed 7kHz rate, while Covox is just a DAC that will output whatever is on LPT data pins at any time.

Reply 53 of 138, by stamasd

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Jepael wrote:
stamasd wrote:

Regarding the Covox/DSS, I see mentions of "mono", "stereo-on-1" and "stereo-on-2". Mono is obvious, and I think I figured what the "stereo-on-1" means. But I can't figure out what "stereo-on-2" is.

Two mono covoxes on two LPT ports.

Yeah that makes more sense. Prone to desynchronization probably.

But I have to add that while Covox and DSS are both LPT port DACs, they are completely different and not compatible. Samples need to be written to DSS with a load strobe and they go into 16 sample FIFO that can signal when it's full and samples are played back at fixed 7kHz rate, while Covox is just a DAC that will output whatever is on LPT data pins at any time.

Yes, that part was clear.

I/O, I/O,
It's off to disk I go,
With a bit and a byte
And a read and a write,
I/O, I/O

Reply 54 of 138, by dr.zeissler

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Can someone give us a status update of the dss/covox project ?

thx
doc

CPU: PII 133-333 MOBO: SNI-D981 RAM: 512- FDD: Dualfloppy 3,5"HD/5,25"HD - 3,5"HD - 5,25"DD ISA-Catweasel HDD: 2x40GB - DVD
ISA(3): Audician32-S2Dreamblaster - GusACE PCI(3): Monster3D- Intel NW AGP(1): 3dfx V3-3000

Reply 57 of 138, by Paralel

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Think we can convince Dreamblaster to make a CVX4 + DSS Dongle pack?

Seems like it would be an even better seller than the CVX4 by itself because it would vastly increase the number of titles that could be used with it.

Reply 58 of 138, by matze79

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I ordered a patch of pcbs with shockwav3's design.
so in a couple of days/weeks i will have a version on pcb 😀

also made a covox with dac ic.. but still only schematic and brd on my desk.
had no time to make a pcb for now.

But i will do in the next months.
Its full chip dac but only mono, with lpt passtrough.
So i don't have to unplug printer/etc..

https://dosreloaded.de - The German Retro DOS PC Community
https://www.retroianer.de - under constructing since ever

Co2 - for a endless Summer