Started by VintageAdvantage, 01:55, 16 April 21
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Quote from: pelrun on 07:41, 16 April 21UTSource
Quote from: Bryce on 11:37, 16 April 21He had to have taken the GA's from original machines. UTSource don't offer them and there's is no known source for them anywhere else.Bryce.
Quote from: Sykobee (Briggsy) on 14:30, 16 April 21I thought the GA logic was decoded, so could a small FPGA or microcontroller (with enough I/O for the GA I/O including three analogue pins for RGB out to replace the tristate outputs on the GA) be used these days (counted on a compatible package)? Obviously someone would have to do the work, which is probably a bit of a pain.
Quote from: thomas on 17:39, 16 April 21but I can't find it either at the moment
Quote from: VintageAdvantage on 21:14, 16 April 21Is it this one??? https://www.utsource.net/itm/p/8648279.html A mislabeled / miscategorized part?? I have sent an inquiry for the price... it doesn't show.
Quote from: Bryce on 21:42, 16 April 21Thanks for the recommendation above too, but to be honest, it's extremely rare that the GA is the cause of a non-working CPC. They are surprisingly robust for an ASIC. I have a "stock" of one working 40007 and 40010 which I use to confirm that that's not the issue when I am diagnosing CPC's. But I don't think I've ever had to swap one other than in cases of over-voltage.
Quote from: VintageAdvantage on 18:12, 16 April 21To the RetroCaveMan's credit, he might not know about how serious this issue of CPC for Gate Array butchering is (and how essential these chips are to keep real CPCs working!).Please send any leftover GA to Bryce so he can do his work! IF the chips are from real CPCs, then I think it is a violation of the Code of Conduct for Vintage Computer Collectors, and I would have assumed that prominent figures such as RCM would be aware and more sensitive to this: http://www.sinasohn.com/clascomp/ccccc.htm I will do my damnest to find a home for any classic or unwanted computer. I will return or destroy any personal or commercially sensitive data I find on a machine I acquire, and will keep it in the strictest confidence, should I find it necessary to view it. I will aid users in the decomissioning of their machines, should they require assistance. I will respect active software and publication copyrights. I will, whenever possible, repair the computers in my collection and maintain them in working order, and will assist others in doing the same, to the best of my ability. I will actively encourage the repair, maintenance, and use of older computers, in preference to the irreversable alteration of machines and parts for non-computer applications. I will actively promote the exchange of computers, parts, and information among collectors, and will refrain from hoarding multiple examples of any item. I will actively promote ethical collecting. But then, it is of course up to JustCPC buyers to simply swap in their own Gate Array from their real CPC. Not sure I would want to do this though. I think the JustCPC is an impressive piece of engineering, but I also think it comes with some problems, and I would have expected a more critical and insightful discussion from the RetroCaveMan rather than just waving the Zaxon Fan Boy Flag.
Quote from: Bryce on 21:42, 16 April 21No unfortunately that's a screamingly obvious example of a chip that has been sanded down and reprinted with a part number that attracts high prices. If you are in any doubt, ask them for a picture of the whole stock and you'll see that they were all somehow produced in the same week.That example is actually worse, because they didn't even go to the bother of hiding the sanded surface.
Quote from: VintageAdvantage on 21:49, 16 April 21His YouTube comments indeed mention UTSource so you are saying he is just bullshitting us, right?
Quote from: tjohnson on 10:42, 17 April 21I get your point but code of conduct? I don't like seeing good repairable computers or even working computers stripped but ultimatly if someone owns something it's their property and they can do what they like with it. I don't agree but that's life. I hate seeing mature trees being cut down so some dickhead can build and extension or to save them having to sweep up the leaves, I'd rather set a few plastic amstrad stripped than having decade or century old trees cut down but still it happens alot. Sorry to rant and change subject.
Quote from: gerald on 11:21, 17 April 21Regarding the 40010 at utsource, they are clearly marked as used. So if you have someone to blame for ripping a CPC, it's the one that ditched the CPC it came from .
Quote from: VintageAdvantage on 18:56, 17 April 21He also claims that he sold > 400 JustSpeccys... which is of course an entirely different story, because the Spectrum community has a reengineered ULA (SLAM ULA). So great for him - but please stay away from our beloved CPCs and their GAs for your zombie creations - UNTIL we have an (FPGA) GA replacement for the CPC. EDIT: It's actually more like Frankenstein creation EDIT2: I admire his skills - but I will not be getting a JustCPC before we have a GA replacement.
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