[sdiy] MOS 6581 SID Chip for Commodore 64/128... sale ending tonight.
tom at electricdruid.net
Thu Mar 12 12:27:16 CET 2015
+1 agree. You can still wipe the markings off a modern PIC with nothing more than a sweaty finger. I've got several that have been pulled in and out of programmers too often and which have no markings left. Loss of markings doesn't prove anything much.
On 12 Mar 2015, at 11:07, Roman Sowa <modular at go2.pl> wrote:
> Do you mean there are SID chips that actually work, but are fake?
> If it works it's not fake. If the filter is not working, the chip may be an out-of-specs reject, or simply damaged.
> Do you think someone would actually invest hundreds of thousands of dollars to make a run of replacement working chips years after it become obsolete while world's demand for it was like maybe 1000 pieces, mostly in DIY market? It's so much easier to make a silicon-less plastic with legs and marking. That's what I call fake.
> I also remember the times when all genuine chips available were marked with an ink that could be wiped out.
> W dniu 2015-03-12 o 07:27, Ove Ridé pisze:
>> Sorry to rain on your parade (and the auction is already finished anyway) but...
>> After a little bit of research, there have been chips marked
>> specifically MOS 6581 CBM 2385 which are known suspected fakes.
>> See: http://kevtris.org/Projects/sid/remarked_sids.html and
>> Note that the chip can output sound despite being a fake, so simply
>> testing that is not sufficient. Often, the filter is not working.
>> Passable for a casual gamer, but not very useful if you're planning to
>> use it for music making. Also, the markings on fakes are often written
>> with some sort of ink that easily dissolves in acetone, which cna be
>> used as a second test.
>> Note that it may be a fake even if you are selling it in good faith.
>> You might have bought a complete C64 from a less scrupulous seller a
>> couple of years ago and gotten a fake SID in it. Unless you have owned
>> the C64 from before the time of fake SIDs, or have done proper testing
>> of the chip, you can't know for sure.
>> On 11 March 2015 at 20:47, Jean-Pierre Desrochers <jpdesroc at oricom.ca> wrote:
>>> This is my eBay auction. I removed the chip myself
>>> from an old working Commodore 64 months ago.
>>> So it's not a fake.
>>> Thanks for watching !
>>> Le 2015-03-11 15:42, Ove Ridé a écrit :
>>>> Is this your auction? Otherwise, do you know that this is a trusted
>>>> seller? So many fake SIDs floating around on the fleabay...
>>>> On 11 March 2015 at 20:33, Jean-Pierre Desrochers <jpdesroc at oricom.ca>
>>>>> For those who'd be interested..
>>>>> MOS 6581 SID Chip for Commodore 64/128
>>>>> Cheers !
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