Changeset 359 in t29-www for en/computer/commercial.php
- Timestamp:
- Mar 9, 2013, 9:07:23 PM (11 years ago)
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en/computer/commercial.php
r356 r359 53 53 underlying algorithm. Since the program is stored on a paper tape, every step performed 54 54 by the machine can be seen.<br> 55 <br/>Clicking on the picture yields a <href="/en/devices/ncr446.php">more detailed picture</a></p> 55 56 57 <h5 id="acc">Paper tape accessories:</h5> 58 59 <p>Also interesting are typical paper tape accessories as shown below. It is 60 next to incredible that not too far ago programs had to be prepared with 61 tools like these. The figure below shows a manual paper tape punch on the left 62 which can be used to punch programs on a paper tape. For the most basic version 63 of the NCR 446 which lacked the attached paper tape punch, this was the only 64 way to create program tapes!<br> 65 66 <div class="box center auto-bildbreite"> 67 <img src="/shared/photos/rechnertechnik/handlocher.jpg" width="682" height="428" /> 68 <div class="bildtext"><b>Manual puncher for paper tape</b> (left) und <b> Tapewinder</b> (right)</div> 69 </div> 70 <p>Programming in those days was done as follows: First, the program was written 71 down by hand. Each character was then translated manually using a NCR 72 supplied code table to its corresponding numerical code. The paper tape was then 73 punched by a secretary. Correcting errors was obviously rather cumbersome and 74 time consuming.<br> 75 76 The NCR 446 in the museum's collection allowed the creation of paper tapes by 77 means of the built-in keyboard and the automatic paper tape punch 78 unit at an additional cost of 20,000 DM (10,000 EUR).<br> 79 80 The motor driven paper tape winder shown on the right could be used to wind 81 the paper tapes after using them on the computer. </p> 82 83 84 85 56 86 <!-- A glimpse of the internal structure of the machine can be seen 57 87 <a href="...">here</a>. --> 58 88 59 89 60 <br/>Clicking on the picture yields a <href="/en/devices/ncr446.php">more detailed picture</a></p>90 61 91 <!-- das war B.Ulmann. Meine Übersetzung (alt): 62 92 <img src="/shared/photos/start/ncr_rechner.jpg" alt="NCR-Rechner" style="margin-right: 25px" />
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