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vedos
Account closed
Registered: Jul 2003
Posts: 33 |
Kevin Horton's FPGA SID, with filter!
Kevin Horton, the hardware hacker extraordinaire (mostly known from his game console hacking) is working on a SID implementation in FPGA.
Yes, it has been done before in eg. C64 DTV (which doesn't even emulate filters), but his aim is to make the filters sound *very* exact to the real thing, by actually implementing them OUTSIDE of the FPGA as a discrete circuit! It is described in greater detail (with samples!) on his blog, at http://blog.kevtris.org/
The filter circuit is based on the actual SID die, as imaged by Tim Boscke (http://www.digital-circuits.org/sid/).
Kevin is looking for all kinds of info about different kinds/revisions of SID chips, and also SID musicians with good ears to assist in filter tuning. Actually, all kinds of help and information would be appreciated. Recordings from additional real SID chips of the 'trickier' songs which use the filter would also be much appreciated.
Another thing which might be of interest for you other hackers out there in regards to his game console hacking, earlier SID player(s), and other FPGA work: http://www.tripoint.org/kevtris/index.html
He can be contacted at kevtris[at]comcast.nospam.net
Toni Paavola and Jonathan Gevaryahu on behalf of Kevin Horton
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vedos
Account closed
Registered: Jul 2003
Posts: 33 |
There's no delete post action? I just messed something up.
But anyways replys in this thread are appreciated. |
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Mace
Registered: May 2002
Posts: 1799 |
Yay, Jeff is the king of filters again :D
Awesome project, btw... very interesting what this will become. |
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JackAsser
Registered: Jun 2002
Posts: 2014 |
Quote: There's no delete post action? I just messed something up.
But anyways replys in this thread are appreciated.
Really cool project, keep on doing this great stuff! Good work! |
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Oswald
Registered: Apr 2002
Posts: 5094 |
awesome indeed. the guy should look into the harderstart thing, and into the oscillator reset with test bit (iirc) stuff discovered lately. |
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Necronomfive
Account closed
Registered: Dec 2004
Posts: 20 |
Cool, finally the envelope generator lookup table id decoded! I should have known they didn't use a binary counter, but a LSFR, which takes much less silicon space. |
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CreaMD
Registered: Dec 2001
Posts: 3057 |
Very interesting project. |
