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ready.
Registered: Feb 2003
Posts: 441 |
Buying Commodore ICs from China
Hello all,
just posting a story about buying Commodore ICs from Chinese suppliers. Before buying read this.
Interestingly there are suppliers that in 2006 produced fake Commodore ICs.
http://www.lemon64.com/forum/viewtopic.php?t=27739 |
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... 17 posts hidden. Click here to view all posts....
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Zer0-X
Account closed
Registered: Aug 2008
Posts: 78 |
I'd still like to see what's inside that chip.
The insides of a real SID are way too familiar by now, as some propably know. :) |
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algorithm
Registered: May 2002
Posts: 705 |
How accurate is SID emulation now (ex Hoxs64) perhaps the future is to just have emulation. Unless of course you want to try to invent some new vic/audio trickery... This then can allow the emulators to become even more accurate.
I would not even dream of using a real 64. I know that there are people out there who swear by it but development time is much much quicker and reliable in my opinion using cross dev tools, pc converters etc |
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taper
Registered: Dec 2001
Posts: 119 |
Many of us are still interested in keeping our original Commodore hardware alive, thus our interest in SID chips, 6526 chips and so on. As a purely digital chip, the 6526 should be clonable pretty easily (using an FPGA perhaps?) for those with knowledge about such things (read: not me!).
The SID is another story, though. The analogue part makes it trickier. A chip emulating the SID as good as possible is ofcourse better than nothing (like in the C64DTV but hopefully better!), eventhough a complete clone of the original chip would be better. Here I'm sure a lot can be learned from the various software emulations. I bet there are many chip factories who could pull it off, the trick would probably be to convince them there is money in it... (which there might or might not be, what do I know...).
Perhaps finding valid new-old-stock sources is less utopic?
I fail to see how Algorithm's preference for development in emulators is valid for this thread though. No matter on what platform a c64 production has been developed on it should be tested on real hardware. And personally I always watch productions on the real thing. If someone else only use emulators, that's their business, and then this thread shouldn't really apply to them anyway. |
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algorithm
Registered: May 2002
Posts: 705 |
For development, yes cross developing is much faster and productive. I would prefer to watch the final result on the real thing as well. Alternatively TV-out with proper refresh rate (if possible) would be nearly just as good |
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Zer0-X
Account closed
Registered: Aug 2008
Posts: 78 |
Old thread, but I just received some of those fake chips from ready.
Pics of the internals coming later today. :)
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ready.
Registered: Feb 2003
Posts: 441 |
Great! The shipping succeded! I am curious to see what's inside! |
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AlexC
Registered: Jan 2008
Posts: 298 |
That is very interesting. Please post your finding.
The problem with emulation is that while it is convenient to use it is missing some part of working with real hardware. I'd like still use my good old C64 and C128 in next 20 years at least. |
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Zer0-X
Account closed
Registered: Aug 2008
Posts: 78 |
UMC made custom chip, product ID A55040S, manufactured on week 12 in 1989. |
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enigma
Registered: Feb 2002
Posts: 15 |
Nice to see the long awaited fakes arrived for extraction.
So is there any info, what these fake IC is, I couldn't find any information from the numbers on the die.
Could it kill a C64 if used as SID replacement?
So current best replacement is putting a sidplay2 core in a DSP/Microcontroller and put it piggypacked in the SID socket? :P
(flashable for emulation updates ofcourse, additional registers for choosing sid templates and full hvsc) |
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ready.
Registered: Feb 2003
Posts: 441 |
Nice to see the die. When I received the chips about one year ago, I tried to put one in the SID socket but with poor results. It gave problems to the other ICs on the bus, causing flickerings on the screen too, producing random sounds. After removal the C64 operation returned to normal.
Now, let's see if anybody can tell what this chip is from the die. |
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