MKII second sid ship

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Don't Panic. Please wash hands.
  • Hi,

    I cannot make the second SID chip to play using the 3mm output. The board can see the both SID chips, but i do not get any sound.

    I have changed the 2 SID around in the sockets to check, if they work and both can produce sound.

    I have set audio output to SID 1 Left, SID 2 Right and stereo SID options to Stereo D420

    I have also tried to switch from ono SID 1 to ono SID 2, but still no sound from SID2.


    What could cause this behavior?


    Could it be CIA 6526 or 8521 chips?


    /Michael

  • The CIA chips are not involved in sound routing - that's purely a matter of the MCU and circuitry of the C64 Reloaded MK2.


    What happens if you put both chips on the same channel? That's the situation that we test here in the QC procedure: A stereo speaker is connected to that 3.5mm connector and the board shall only get the warranty sticker if both speakers output sound. Since there is a human factor involved, I cannot exclude an error on our side.

  • I did some further testing and discovered that the 8580R5 (3391) was not discoverable by the board.

    (the board did blink green)


    I found another 8580R5 (2889) and now it works with the mssiah, if you use DE00 for second SID.


    For it to work you need to choose DE00 in stereo SID options and audio option should be SID 1 left and SID 2 right. This needs to be written to the board before starting mssiah.


    I still wonder why MK2 do not recognize the 8580R5 (3391) – I does work. I also tried with SWINDSID Nano, but MK2 will not recognize it either.

  • What does the menu item "Chipset Info" (I) reports when the unrecognized SID is installed? That makes the "why" a little easier to guess. And it will work as 8580 SID is the fallback mode (as it requires the lowest supply voltage).


    SwinSID is not recognized, because the detection depends on very specific electrical behavior of the various SID chips. I expect the SwinSID to still work though, as it should not care about the supply voltage it gets.

  • The last reply was more than 365 days ago, this thread is most likely obsolete. It is recommended to create a new thread instead.