grinding down chips was Re: QX10 graphics board
cclist at sydex.com
Sat Jan 28 19:19:31 CST 2006
On 1/29/2006 at 12:47 AM Philip Pemberton wrote:
>> From what I remember they were a normal DRAM chip with a quartz lid to
>> the package (it's been suggested you could take a cerdip 4116 or 4164,
>> knock off the top and replkce it with a window).
I recall an early scanner that made no bones about doing just this. From
what I recall, you charged the DRAM with ones or zeroes (don't recall
which), exposed it to light and read it looking for discharged cells. You
could do gray-scaling with several consecutive reads.
This was back in the days of 4116/4164 and IIRC, it mattered whose DRAMs
you used. Intels cells decayed pretty quickly, but the NEC parts would
easily hold a bit for a few seconds.
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