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| Normal printing |
16-pin ceramic DIP
Purple ceramic/gold top/gold pins
National Semiconductor was the only second source company for the Intel 4004. The naming convention for the 4004 processors was "INS4004" plus one letter representing package type. The chip on the picture is mistakenly marked as "1NS4004D". |
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| Upside-down printing |
16-pin ceramic DIP
Purple ceramic/gold top/gold pins
This processor not only has incorrect markings "1NS4004D", but it also has the markings upside-down. |
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