Changeset 183 in t29-www for en/computer
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- Sep 1, 2010, 4:29:09 AM (14 years ago)
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en/computer/univac9200.shtm
r181 r183 116 116 detected a non-existing error at punching. Locating this error is the next 117 117 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> 118 129 119 130 <i>This blog will be irregulary continued.</i>
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