paulrickardsSep 9, 2023

Graphically visualizing the erasure of a 16kbit #EPROM with a UV source in 16 seconds!

This time lapse shows all of the bits being flipped from 0 to 1 over about a 24 minute period. The first bit flips at 8 minutes.

What's fascinating to me is the bits "twinkle" as they flip back and forth before settling.

#RetroComputing #TimeLapse

Show threadChuckSep 10, 2023
@paulrickards I see stuff like this and think "You could treat a UV EPROM as a photographic plate and take UV pictures with it. Program all zeros, use a lens to focus the scene on the array, then a UV flash lamp. Finally read out the state of the EPROM and reconstruct the image. Possible? Who knows.
Show threadgloriouscow

@ChuckMcManis @paulrickards

quite possible I'd assume. One of the first commercial digital cameras had a crude image sensor made from a decapped DRAM

https://en.wikipedia.org/wiki/Cromemco_Cyclops

Cromemco Cyclops - Wikipedia

Mar 13 at 3:48pmWeb
Show threadChuckMar 13

@gloriouscow @paulrickards

I still have some decapped DRAM chips I got when the BYTE article on this dropped. A 64 x 64 monochrome picture was interesting but not great.