>>Yes, if 2 cells next to each other get shorted together for whatever reason >>you will not find them if you fill the whole DRAM with zeros or ones. >>But even 0x55 and 0xAA won't find all possible faults. Grab memtest86+ >>and take a look at all the patters it uses (it tells you while it's running). I have looked at a few test programs like this and they are written with multi-bit wide memory in mind. When testing a single bit wide DRAM most of these tests will not yield any benefit (I think) as the tests are designed to alternately set adjacent bits by using a variety of strategies which one can do directly when testing a single DRAM chip. One thing that caught my eye in the explanations of test for memtest86+ was the walking ones test which might be useful so I'll ad that test in and see what happens. Jeff BirtReceived on 2020-05-29 23:04:24
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