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Forums > CSDb Discussions > Project SIDFX (formerly known as SIDFIXER)
2015-12-20 13:29

Registered: Aug 2010
Posts: 138
Project SIDFX (formerly known as SIDFIXER)

Sorry for spamming you all, but regarding the DUAL SID hardware module SIDFX:

I mailed all PRE-ORDER contacts tuesday and I still miss a reply from 33% of you... please check your spam folder/email if there is any mail from sidfx-preorder@kick-ass.dk (16th december)

Thanks in advance.

There will be a registration site up shortly... so if you didnt pre-order/registrate already, you can also just mail me directly on the sidfx-preorder@kick-ass.dk mail address.

Cheers and merry X-mas to everyone!
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2016-11-07 08:52

Registered: Aug 2010
Posts: 138
okay, first version of the CONFIG tool documentation page is up now. We have added version number and dates to both Manual and Documentation pages now, so you can see if they have changed since last time you looked at them.


http://csdb.dk/scener/?id=27019, let's get in touch and see if we can resolve that issue for you.
2016-11-07 09:43

Registered: Mar 2003
Posts: 95
@Lotus: I've used both SIDs one by one in my Reloaded board, and as far as I can tell, they both sound correctly. One is a 8580 and the other is a 6582. I've only seen them reported as unknown once, and then both were shown as unknown. The other 5-6 times I've used the config tool, they were both identified as 8580. I got a little worried when I got unknown, but after a reset, the config tool reported them as 8580 again. Maybe the 1541U (first version) I'm using does interfere somehow, or maybe it's the Reloaded board.
2016-11-07 09:54

Registered: Mar 2003
Posts: 95
About testing SID chips. Are there any good tools one can use to determine if a SID chip is working correctly? While it's quite easy to hear if a channel is completely dead, how can one tell if the filters are working correctly for example?
2016-11-07 11:56

Registered: Dec 2001
Posts: 8544
the filter (and some other things) cant be tested by a program unfortunately
2016-11-07 14:22

Registered: Dec 2001
Posts: 92
It seems that sidfx took easy way out and +5v line is mostly unfiltered resulting c128 bus noise being on humorous level on sidfx audio output.

Any tips for filtering +5v line, in my previous sid noise filtering hacks I used ferrite and capacitor circuit, but should dc/dc be better on this?

// Grue
2016-11-07 21:48

Registered: Aug 2010
Posts: 138
Grue, I cannot reply on that, but I will let Lotus come back to you on this.
2016-11-07 21:49

Registered: Aug 2010
Posts: 138
Last chance for pre-orders that are still unconfirmed!!!

The last unconfirmed pre-orders will be considered cancelled by wednesday this week!

We are opening up for waiting list after wednesday, so stay tuned if you are one of those waiting to see if there is any units left.
2016-11-08 19:11

Registered: Nov 2004
Posts: 6
Grue: VCC supply rail conditioning for SIDFX was a difficult trade-off between noise suppression, voltage drop, power loss, cost, board space etc. We tested various topologies for VCC and decided on a second-order low-pass filter as the best compromise. Pre-production measurements indicated an audible noise reduction between 5dB and 20dB depending on SID type and dominant noise frequency.
2016-11-08 19:50

Registered: Dec 2001
Posts: 92
poke 53280,1:poke53281,0

turn volume up and listen, you can hear the sound of tradeoff.

Its better than unmodified one, but I'm still disappointed that I can hear vic-ii on SIDFX output..

2016-11-08 22:15

Registered: Aug 2015
Posts: 14
Quoting Grue
Its better than unmodified one, but I'm still disappointed that I can hear vic-ii on SIDFX output..

Oh noes.. that can't be true because...

Quoting Zer0-X
SIDFX, fully isolated from the system bus via programmable logic to remove the usual VIC-whine and all the other noise produced by the rest of the system.
MixSID, no.
... and

Quoting MagerValp
To claim that it isn't driven by enthusiasm is patently absurd, they've obviously spent a lot of time and effort into designing the ultimate stereo sid board.

*Smabel does his Vincent Vega impersonation*
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