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In order to help the service technician locate faulty parts at a glance.
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I mean, Rods, many a time I have seen dud chips with nary a mark on them but yet indubitably not performing whatever it was that their maker had intended them to do. |
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Large Scale Integration. Basically, a huge chip, with lots of transistors on it.
Would this display also indicate who is to become Pope? |
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How about adding a GaAs layer on top so as to provide built-in indicator lights? |
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The larger chips get, the more difficult they are to test. Therefore modern LSI chips already have some extra circuitry devoted to improving their testability. |
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Added circuitry to test the chip on power-up and display the results on an attached LED or a dedicated display would not add much complexity. |
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Modern electronic appliances are fast becoming "single chip" designs, so all this may become redundant as replacement alone works. |
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