Re: VIC-II DRAM refresh

From: Gerrit Heitsch <>
Date: Sat, 15 Oct 2016 19:28:31 +0200
Message-ID: <>
On 10/15/2016 07:12 PM, Francesco Messineo wrote:
> On Sat, Oct 15, 2016 at 7:06 PM, Gerrit Heitsch
> <> wrote:
>> On 10/14/2016 01:21 PM, wrote:
>> And yes, I also had a few DRAMs that were just dead and doing bad things on
>> the bus. One I found by stacking not one but two working 4164 on top of the
>> bad one (*) after noticing the activity on the data line looked strange on
>> the scope.
> that's interesting. I always stacked one good chip, if it didn't help,
> I would revert to code

I added one, saw on the scope that the signals looked better and decided 
to try another one. Then I got the normal start screen which told me enough.


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Received on 2016-10-15 18:00:52

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