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hardware OS4   hardware OS4 : Miracles happen: A1 onboard audio works!
   posted by DaveAE on 25-Oct-2005 21:46:09 (25928 reads)
This might come as a shock, but I've uploaded a working via686b onboard audio driver for the AmigaOne! Only the first batch(es) of A1's actually have the AC'97 chip physically on the board.

Update: New VIA686B AHI driver on OS4depot


Unfortunately, it was taken off later on as Eyetech didn't think it was ever going to work. You could just try the driver to see if you have such a chip, but you can also have a look on the motherboard: left to the AGP-port, under the gfx card either is a small Sigmatel chip or an empty square. Most people won't have the chip though.

Some clever guy found out what was wrong. I'll mention him later on if he wants to be mentioned, I'm not sure at this moment if he does. Normally, the BIOS/firmware sets up some registers of the VIA that make it work (ACPI), unfortunately back then we thought it was a hardware issue.

This first version is very basic. It is playback only, has CD-in monitoring, but no volume controls etc. This will come soon in a later version.

If you're lucky to have the AC'97 chip, give it a try. If you'll use it, I would appreciate a small donation of 5 euro to paypal@audio-evolution.com.

Kind regards and thanks to the guy who found out about it in the first place!

Davy Wentzler
    

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Varthall 
Re: Miracles happen: A1 onboard audio works!
Posted on 26-Oct-2005 0:14:42
#41 ]
Super Member
Joined: 17-Feb-2004
Posts: 1552
From: Up Rough

@Geri:

So does it output at 20 bit of resolution? Hey, it's even better than my Soundblaster PCI 128, which is limited to 16 bit only :P

Varthall


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Geri 
Re: Miracles happen: A1 onboard audio works!
Posted on 26-Oct-2005 0:22:57
#42 ]
Elite Member
Joined: 7-Oct-2003
Posts: 2033
From: ST/AT

@Varthall

IMHO it still outputs 16bit sound. The Sigma Delta ADCs are working with 20 bits, to get a better resolution, but I'm not a SD ADC specialist. (In other words, the SD ADC just interpolates the data a little bit, to lower noise on the output.)

Last edited by Geri on 26-Oct-2005 at 12:24 AM.


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A1XE: G4@933MHz, 2GB, refitted AC'97 codec
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Kicko 
Re: Miracles happen: A1 onboard audio works!
Posted on 26-Oct-2005 0:37:08
#43 ]
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Joined: 19-Jun-2004
Posts: 5009
From: Sweden

I believe this pciscan says i have it but when looking on motherboard its empty. However, my Juli@ has a more beautiful voice :)

09 0x1106 0x3058 VIA Technologies Inc VT82C686A/B AC97 Audio Codec

Nice that DaveAE fixed the problem. Some people are for sure happy :)

EDIT: I have no chip :'(

Last edited by Kicko on 27-Oct-2005 at 12:28 AM.

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Geri 
Re: Miracles happen: A1 onboard audio works!
Posted on 26-Oct-2005 0:39:44
#44 ]
Elite Member
Joined: 7-Oct-2003
Posts: 2033
From: ST/AT

@Kicko

If it is not soldered on the motherboard, then you don't have it. The output of pciscan just shows the VIA AC97 controller, which interfaces the AC97 codec (AFAIK).


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microA1: G3@800MHz, 1GB

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T_Power 
Re: Miracles happen: A1 onboard audio works!
Posted on 26-Oct-2005 0:40:53
#45 ]
Regular Member
Joined: 8-Sep-2003
Posts: 359
From: Durban, South Africa

@DaveAE

Brilliant

Thank you, but HOW did you do it?
Did you find new registers, special init. sequence code???

Most interesting.

And thank you again.

Cheers,
Tim

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EntilZha 
Re: Miracles happen: A1 onboard audio works!
Posted on 26-Oct-2005 0:41:03
#46 ]
OS4 Core Developer
Joined: 27-Aug-2003
Posts: 1679
From: The Jedi Academy, Yavin 4

Quote:
Nice that DaveAE fixed the problem.


Actually, it wasn't Dave who found out about the problem, but Steven Brookes,.


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T_Power 
Re: Miracles happen: A1 onboard audio works!
Posted on 26-Oct-2005 0:44:17
#47 ]
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Joined: 8-Sep-2003
Posts: 359
From: Durban, South Africa

@EntilZha

Thanks to Steven Brookes, but HOW??

Cheers,
Tim

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Chain-Q 
Re: Miracles happen: A1 onboard audio works!
Posted on 26-Oct-2005 0:54:40
#48 ]
Cult Member
Joined: 31-Jan-2005
Posts: 818
From: Budapest, Hungary

First, i'd like to congratulate for making it work. (And i'm serious about that, no irony!) About the whole A1XE sound issues over the years, i'd like not to comment, because it's already beyond pathetic... But it's finally good to know that it actually works.


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jtubbs 
Re: Miracles happen: A1 onboard audio works!
Posted on 26-Oct-2005 0:55:17
#49 ]
Regular Member
Joined: 10-Sep-2003
Posts: 396
From: Twin Falls, Idaho

"Do A1-SEs have this chip at all?"

Mine doesn't. It doesn't even have the outputs on the back plate. However, I'm glad a looked inside my A1. I found several dead spiders. I suppose when they discovered I wasn't running windows, they lost all purpose of existence and just dried up!
To bad my XPbox doesn't have the same good fortune.

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STRICQ 
Re: Miracles happen: A1 onboard audio works!
Posted on 26-Oct-2005 1:19:01
#50 ]
Regular Member
Joined: 23-Mar-2003
Posts: 221
From: Colorado Springs, CO

Here is another reference image I just took of my own A1 XE:

http://www.stricq.com/IMG_0145.JPG


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MasterOfReality 
Re: Miracles happen: A1 onboard audio works!
Posted on 26-Oct-2005 1:23:33
#51 ]
Regular Member
Joined: 22-Mar-2003
Posts: 162
From: Unknown

@jtubbs

IIRC the SE was supposed to have audio on an AMR riser card which never materialized.

Olegil designed and made one but there wasn't enough interest to get it produced as it cost about the same as a PCI audio card.

IIRC, and I may not as it was a long time ago.

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tomazkid 
Re: Miracles happen: A1 onboard audio works!
Posted on 26-Oct-2005 1:51:32
#52 ]
Team Member
Joined: 31-Jul-2003
Posts: 11694
From: Kristianstad, Sweden

Hey Dave.

This is hilarious news

After all the trouble I'd had with my A1XE cursing that non-working onboard sound, you now over 2 years after, found a fix
a to the person that initially found the cure.


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wegster 
Re: Miracles happen: A1 onboard audio works!
Posted on 26-Oct-2005 2:01:30
#53 ]
Elite Member
Joined: 29-Nov-2004
Posts: 8554
From: RTP, NC USA

Too funny Good work to DaveAE and umm...sigh, the guy who actually found the problem!


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redfox 
Re: Miracles happen: A1 onboard audio works!
Posted on 26-Oct-2005 2:09:13
#54 ]
Super Member
Joined: 7-Mar-2003
Posts: 1713
From: Canada

Good work guys

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rossv 
Re: Miracles happen: A1 onboard audio works!
Posted on 26-Oct-2005 2:09:45
#55 ]
Regular Member
Joined: 22-Mar-2003
Posts: 383
From: Sydney, Australia

Hi,

Ole-Egil built an AMR card but just like the XE, it didn't work (for the same reason). It would probably work now though.

Regards.


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DWolfman 
Re: Miracles happen: A1 onboard audio works!
Posted on 26-Oct-2005 2:37:30
#56 ]
Super Member
Joined: 18-Jun-2003
Posts: 1442
From: Kansas City, MO USA

Now, I'd be wondering for those who don't have the chip, can that just be added to the board if one can be obtained?

Will have to look at my board later and see if I have the chip. Mine is probably not one of the earlier batches, though it did originally have the May 2003 UBoot in it. I bought it from Software Hut in December 2003.


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Steff 
Re: Miracles happen: A1 onboard audio works!
Posted on 26-Oct-2005 3:05:03
#57 ]
Super Member
Joined: 11-Mar-2003
Posts: 1342
From: Göteborg, Sweden

@DaveAE

Nice to see this working. When I get home this weekend I'll have to give it a try!

@thread

About soldering this chip onto boards that don't have it!

C'mon people get serious. Would you solder a chip onto a pc board that doesn't have sound? Is it worth the chance of frying something else?

Most of us couldn't care less that the onboard sound didn't work when we bought the board (although many made an issue of the principle of the thing) and if you didn't have the chip from the beginning then you can't ever have expected it to work.

This is nice for those that have the chip AND might have some use for it. Personally I have a juli@ which is far better for my purposes but if I ever run out of pci slots who knows..

I think it would be a shame if peple started another wave of frying their boards by trying to solder soundchips onto them.

Juust an idea.


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DWolfman 
Re: Miracles happen: A1 onboard audio works!
Posted on 26-Oct-2005 3:08:54
#58 ]
Super Member
Joined: 18-Jun-2003
Posts: 1442
From: Kansas City, MO USA

@Rob

Quote:
The chip is surface mounted I don't think you'd be able to solder it by hand.


Heh! Not that hard really. Well for me at least. I can put one of those on with a pencil-tip soldering iron. Used to have to do that every other day at one of my previous jobs.

Now, I'm not so sure my hands are as steady as they used to be though, so it will probably be a bit tougher than it used to be.

BTW, I verified my board does not have the chip but it does appear to have all the other parts around it that are connected to it (capacitors, resistors, etc), with the exception of one or two resistors (maybe). I would be willing to give this a go if someone can post their Sigmatel chip part number in here. If I can get one, I'll solder it up and see if it works.


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DWolfman 
Re: Miracles happen: A1 onboard audio works!
Posted on 26-Oct-2005 3:23:15
#59 ]
Super Member
Joined: 18-Jun-2003
Posts: 1442
From: Kansas City, MO USA

@Varthall

Quote:
It's quite awkward to read the number of the IC, I had to remove my Radeon and watch it closely to be able to read the tiny letters. This is the chip's code:

SIGMATEL
STAC9752T
CB2U008
0247

and the chip is labeled U43 on the motherboard.


OK, here's what I found on this: STAC9752 datasheet (covers STAC9752T)

I found lots of references to this chip in a Google search, but most of them had to do with drivers and such (like for ALSA in Linux for example). I found a few places that sell parts that list the number on pages that are just massive listings of part numbers. No descriptions or prices listed. Sigmatel also does not have a purchase link on their page that I could find.

May be a tad difficult getting one of these chips.

And I suppose I should have read through the rest of the posts before putting this one up. Oh well.

Last edited by DWolfman on 26-Oct-2005 at 03:27 AM.


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DWolfman 
Re: Miracles happen: A1 onboard audio works!
Posted on 26-Oct-2005 3:33:35
#60 ]
Super Member
Joined: 18-Jun-2003
Posts: 1442
From: Kansas City, MO USA

@Steff

Well, in my case I have the skills to fix the board myself. Just like I now know how to fix the DMA issue, but have held off for a few reasons (primarily that they might still figure out how to properly configure things and the workaround may not be needed). I suppose the A1 XE wasn't as bad of a board as most of us initially thought. Mine's out of warranty by now (coming up on 2 years old, and the US doesn't have any kind of mandatory warranty periods like some other countries have), so I can do anything I want to with it.

Thing is it is still Eyetech that needs to make good on this. Regardless of the fact that it really is just a driver issue, they still sold a board that for all intents and purposes has a "broken" on-board sound setup. In my case since they basically gave up on fixing it, I really do have a broken one because I don't have the chip on the board.

Anyway, enough venting. I'd just be glad to free up one more slot in my A1, because sometime in the future I may want to add a bunch of hard drives to my system where I'll need some additional controllers plugged in. Eventually, I want to get some Serial ATA drives to go in it.


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