Re: VIC-II DRAM refresh

From: Francesco Messineo <>
Date: Fri, 14 Oct 2016 13:42:09 +0200
Message-ID: <>
On Fri, Oct 14, 2016 at 1:21 PM,  <> wrote:

> I'd say the "meltdown" (as Gerrit called it) is at least as common. But that probably also depends on the brand. And if I am to think about it, I'd also say that I (probably - about 4ms of lack of refresh on those memcells :) had more cases when the chip was plain dead, poisoning the bus or so than cases where some cells failed but the chip was otherwise working. Summarising, I'd say the "almost always" part of your statement is what I find hard to agree with ;-)

ok, everybody has different experience. None of us "lives" by
repairing electronics from the '80s (or some of you still can maybe?)
so it's a limited set of cases for everybody.
I don't expect to be right on anything actually. I'd like to have a
good statistical sample of failures to try to speed up the
troubleshooting phase sometimes. But so far, my efforts were vain in
this respect (I fix more test equipment than computers lately, and
electronics can fail in some quite creative ways too).
Our statistics have another problem also, we usually don't bother
taking note of the working equipment we have as we do with not working
ones (sometimes). I have no idea of what brand of chips are inside on
some of the old computers that I have sitting here and never had to
repair for example.
None will ship us computers that have nothing to be fixed too :)


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Received on 2016-10-14 12:01:21

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