If you’ve never watched Halt and Catch Fire, it is a pretty good show. There is one scene where the main character is reverse engineering the BIOS of IBM’s computer, by placing the memory in a circuit and addressing each memory address and recording the value stored there.

I thought this scene was the coolest thing I’ve seen on a TV show. In the meantime I happened to come across some UV Erase-able ROM chips:

UV Erase-able ROM DS2732A

So I set about making a similar circuit. I connected some DIP switches to the address selectors – there is one set for the Row and one for the Column. I hooked the output up to some LEDs to read. Here are a few action shots:

 

UV Eraseable Memory – Fun With Old Tech
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