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17 | <meta name="t29.SVN" content="$Id: wang320.php 257 2012-05-28 13:01:21Z sven $" /> |
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23 | |
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25 | <img src="/shared/photos/rechnertechnik/wang320,keyboard.jpg" alt="Wang 320 SE Keyboard and a punch card" width="600" height="596"/> |
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26 | |
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27 | <p> |
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28 | For displaying 10x10 digits, 9 decimal places and the leading sign the device |
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29 | needs only 14 data lines. Hence Wang already implemented multiplexing. |
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30 | <br>The punch card contains a program for computing sinus values. It actually |
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31 | simulates keyboard input. The display shows the result for <code>sin(60°)</code>, |
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32 | whereas the last four positions are inaccurate. |
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33 | <br>The picture below shows some details from the inner life with keyboard and |
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34 | nixie tubes, glow lamps (for showing the comma) and transistors for amplifying. |
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35 | The switches in the background are part of the keyboard. |
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36 | </p> |
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37 | |
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38 | <img src="/shared/photos/rechnertechnik/wang-nixietube.jpg" alt="Wang Nixie tubes" width="595" height="446"/> |
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