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4 SIDs plus shift registers implemented in Papilio Pro FPGA


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I saw the conversation about the FPGASID project and I'd thought I'd share some work I have been doing regarding SID implementation in FPGA as well.

I purchased a Papilio Pro (http://papilio.cc/index.php?n=Papilio.PapilioPro) board as part of the retrocade synth (http://retrocade.gadgetfactory.net/) a while ago and recently decided to try and find out how many SIDs I could fit into the board if I took everything else out.  I ended up with 4 SIDs plus the associated shift registers that I am able to connect right up to my MIDIBox MB6582.  I can even drive both real SIDs and the FPGA versions from the same signals from the MIDIBox in order to do A/B comparisons.

I am working on designing an interface board to connect the midibox to the papillio pro, it isn't finished but if anyone is interested it is here: https://upverter.com/LVL1Soundbuilders/32fbede244e1a406/Papillio-Pro-to-Midibox-SID-Interface-PCB/

The papilio pro is open source, the board I am working on is open and I'd be glad to share my file of the 4 sid implementation.  I'll post a link once I decide on the best place to put it.

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Oh wow that sounds pretty awesome! I hope you keep us updated! I haven't touched FPGAs since college so don't have much to share other than my enthusiasm. But with the SID supply drying up, it's nice to see more FPGA solutions come about. Ones that can work with MidiBox, in my opinion, are all the better!

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