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Forums > CSDb Discussions > SIDFX on Sidplay64
2017-05-08 21:08

Registered: Feb 2002
Posts: 226
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.
... 18 posts hidden. Click here to view all posts....
2017-05-14 18:01

Registered: Feb 2002
Posts: 226
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 20:55

Registered: Feb 2002
Posts: 226
1,2 and 3.. Try again. Check beta 3.
2017-05-15 13:44

Registered: Jul 2002
Posts: 14
Good job, Beta 3 works! :)
Mr Ammo nice of you taking time to reproduce the bug.
2017-05-15 16:20

Registered: Feb 2002
Posts: 226
Marvellous. :)

Anyone with the sidfx card who gets a "sidfx card not found" message ?
2017-05-15 19:53
Mr Ammo

Registered: Oct 2002
Posts: 110
Yes, I had that 'sidfx card not found' a few times. I have not yet tried to reproduce this.
2017-07-17 02:28

Registered: Oct 2009
Posts: 34
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 19:48

Registered: Feb 2002
Posts: 226
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.

2017-07-24 14:13

Registered: Oct 2009
Posts: 34
Thanks for the tip , im use the sidfx test 1.1 and
he recognizes it well , whaiting for the last version of SIDFX on Sidplay64 to test the multiple checks


2017-07-25 16:32

Registered: Dec 2014
Posts: 33
I have the same issue = C64reloaded, 1541u2 and a sidfx with old and new sid... and detection failing seemingly randomly

Someone had noted in another thread that C64R migh have different timing/delays at boot and this could be the issue. It seemed to be a know issue with C64R. Maybe I am not remembering it correctly.
2018-01-27 12:52

Registered: Feb 2002
Posts: 226
My sidfx had 2-3 loose solder joints.
I dont know of this was caused by myself when fiddling with it. But it must have been the reason for my bugs.

Lucky for me, I bought two sidfx cards.
And after being much much more careful when
inserting my 2nd sidfx card, the C64reloaded has worked 100% with the sidfx card and
my sidplay64 program.

I have also tried it with a C64C over some time, and had no problems.

It works!

@frantic, the source is available now
at my gitlab station. See production note in latest update for url.
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