Changeset 183 in t29-www for en/computer


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Timestamp:
Sep 1, 2010, 4:29:09 AM (14 years ago)
Author:
sven
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  • univac9200.shtm: Neusten Blogeintrag uebersetzt
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  • en/computer/univac9200.shtm

    r181 r183  
    116116           detected a non-existing error at punching. Locating this error is the next
    117117           problem.</p>
     118        <p><b>26.08.2010:</b> Locating this bug in the device's internal error checking
     119           of punched data was hard work. The computer compares the data which should be
     120           punched with the position of the hammers in the punch station in a very
     121           complex way. Only one of the 24 inductive sensing elements was broken,
     122           furthermore a transistor which amplifies the particular induced voltage was
     123           out of order and there was a cold solder joint. Finally the complete sensing
     124           station had to be recallibrated to deliver all information simultaneously to
     125           the comparing element. The adjustment has only a margin of 5 microseconds.
     126           After this reparation, all duplicated punch cards are checked, too. If there
     127           is a wrong punch hole, the computer stops immediately (an event that occurs
     128           extremely rare as from now).</p>
    118129       
    119130        <i>This blog will be irregulary continued.</i>
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