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https://www.aliexpress.com/item/32502628342.html?spm=a2g0s.9042311.0.0.26d74c4djJ9h5FHard to tell from just their "glamour shot" of a generic vendor-less chip.I ordered some for fun and what I got doesn't look right to me. I need to dig out my socketed C64 to test these chips later. On the left is a real TI 41256 from my hoard. It's not the same type but the markings and package details are different from the Ali Express special on the right.I know the pics are terrible, but the 1980s part has printed or silkscreened markings, but the Ali part is laser etched, I can see the depth of the markings,Did they laser-etch chips like this in the 1980s?