I have several dozen memory chips that can be erased with ultraviolet light. I salvaged these chips from electronic devices from the 1980s and 1990s; they were found on computer motherboards and used to program the BIOS. I have an XGECU programmer, and it can read these chips, but it can't erase them because it doesn't have a UV light source. I decided to test these memory chips with this programmer, and maybe once I have a UV light source, I'll be able to erase them.
To test it, I took the M27C1001 microcircuit. This is an EPROM microcircuit with a memory size of 1 Mbit. There is a window on the microcircuit body where you need to shine an ultraviolet light to erase the information.
My programmer can work with this chip.
As you can see, the programmer can program this chip, but cannot erase it. For normal operation, uncheck the "Check ID" box.
Since I got this chip from somewhere, it contains information. FF are empty cells.
I wrote the new 1F information into these cells and pressed the "program" button.
The memory chip is working and I'll save it; maybe I'll need it.
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