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Scarzix
Registered: Aug 2010
Posts: 143 |
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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AmiDog
Registered: Mar 2003
Posts: 97 |
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? |
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chatGPZ
Registered: Dec 2001
Posts: 11356 |
the filter (and some other things) cant be tested by a program unfortunately |
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Grue
Registered: Dec 2001
Posts: 161 |
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 |
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Scarzix
Registered: Aug 2010
Posts: 143 |
Grue, I cannot reply on that, but I will let Lotus come back to you on this. |
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Scarzix
Registered: Aug 2010
Posts: 143 |
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. |
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Lotus
Registered: Nov 2004
Posts: 7 |
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. |
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Grue
Registered: Dec 2001
Posts: 161 |
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..
:) |
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Snabel
Registered: Aug 2015
Posts: 24 |
Quoting GrueIts 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-XSIDFX, 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 MagerValpTo 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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Frantic
Registered: Mar 2003
Posts: 1646 |
I am very happy with my SIDFX and I am happy that you guys put all that effort into doing this. I can only recommend it to others and I have put myself up on the list for another unit, in case there would be a second batch at some point. |
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Radiant
Registered: Sep 2004
Posts: 639 |
Hope I signed up for the waiting list in time to get one. Would be perfect for my SX-64. :-) |
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