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Forums > CSDb Discussions > SIDFX on Sidplay64
2017-05-08 23:08

Registered: Feb 2002
Posts: 224
SIDFX on Sidplay64

Hello users,
For anyone interested - I have implemented SIDFX
support in the latest Sidplay64 beta available at:


I have only tested it with the 1541u2, and it works great.

I welcome any feedback here on how it works with other devices
before I release it.
... 16 posts hidden. Click here to view all posts....
2017-05-14 13:17

Registered: Feb 2002
Posts: 224
My sidfx switch 2 is set to center position. And configured to be in Mono.

Dont know if that has to do with anything.
2017-05-14 14:00

Registered: Jul 2002
Posts: 14
Ok, set SW#2 to mono now, but didn't fix it.
2017-05-14 17:16
Mr Ammo

Registered: Oct 2002
Posts: 80
I use the same config as GRG, meaning: 6581 == SID1 and 8580 == SID2. But when I change it to Fenz's config (physically switching the SIDs),I see the same symptoms as Fenz describes.

It almost seems like something is hardcoded to always play 6581 tunes in SID1 and 8580 tunes in SID2.

It's weird, the least to say. I have switched back to my old config since that works with SP64.
2017-05-14 20:01

Registered: Feb 2002
Posts: 224
Ah, crap, ofcourse. It's another bug in my code when checking for unknown or faulty sid's that causes this.. when these two states are recognized it reverts to recommended sidfx setup which is 6581 in #1 and 8580 in #2.
2017-05-14 22:55

Registered: Feb 2002
Posts: 224
1,2 and 3.. Try again. Check beta 3.
2017-05-15 15:44

Registered: Jul 2002
Posts: 14
Good job, Beta 3 works! :)
Mr Ammo nice of you taking time to reproduce the bug.
2017-05-15 18:20

Registered: Feb 2002
Posts: 224
Marvellous. :)

Anyone with the sidfx card who gets a "sidfx card not found" message ?
2017-05-15 21:53
Mr Ammo

Registered: Oct 2002
Posts: 80
Yes, I had that 'sidfx card not found' a few times. I have not yet tried to reproduce this.
2017-07-17 04:28

Registered: Oct 2009
Posts: 29
Quote: Marvellous. :)

Anyone with the sidfx card who gets a "sidfx card not found" message ?

Here i am , "sidfx card not found" , im only 1 sid in slot 1 6581 , slot 2 empty , im use a c64 reloaded + 1541u2
2017-07-23 21:48

Registered: Feb 2002
Posts: 224
Hi Thierry (and others),
First of all sidfx is ment for two sidchips.
If you dont have two sidchips you might as well use the non-sidfx versions.
I assume you only did this to test if it was working :)
But if you are unsure your sidfx is working then try the sidfx config and test tool: SIDFX Config and Test Tool V1.1


I have a similar setup, C64reloaded, 1541u2 and a sidfx with old and new sid.
And I had a lot of errors with the sidfx card not detecting properly. Sometimes it stopped working while playing songs,
and was completely silent, or made long alien beeps now and then.

It could be the c64reloaded needs your sidfx connectors and pins to be at a very exact positions to work reliable.

Because, after I carefully re-attached the sidfx board to the c64reloaded, and made sure all pins was properly in place, it has worked very well for me.

I have updated the sidfx identifier to identify unlimited times with a keypress if it fails the first time.
So on my machine the detection itself goes through with no problem.

This new version has not been uploaded to my page yet.
There is also support for Chameleon in the latest version.

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