source: t29-www/en/devices/diehl-combitronic.php @ 287

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Zusammenführung der englischen neuen Homepage mit den unterdessen veränderten Texten der englischen laufenden Homepage.

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3<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
4<head><!--#set var="title"        value="Details of the Diehl Combitronic and Algotronic"
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17    <meta name="t29.SVN" content="$Id: diehl-combitronic.php 287 2012-08-16 09:02:07Z sven $" />
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19<body>
20<!--#echo encoding="none" var="heading" -->
21<div id="content">
22    <h2><!--#echo var="title" --></h2>
23
24<div class="box center">
25      <div style="white-space:nowrap">
26        <img src="/shared/photos/rechnertechnik/combitronic-lochstreifen.jpg" width="330" height="247" alt="Paper Tape used for booting" />
27        <img src="/shared/photos/rechnertechnik/combitronic-logik.jpg" width="322" height="247" alt="Combitronic logic boards" style="margin-left:14px" />
28      </div>
29      <p>These two pictures show some details from the Combitronic. In the picture on the left
30         hand you see the metallic paper tape that is used for booting the device. It is driven
31         by the engine from the printer. The picture on the right hand shows germanium transistors
32         on the upper board and ceramic ROM ICs on the lower board.</p>
33
34     <!-- paragraph new: 29.12.2008 16:38 -->
35     <p>It is quite interesting to see DIEHL improving quite slowly but
36        continuing their hardware: The successor model <b>DIEHL Algotronic</b>
37        (1973/74) featured 2x 21 shift registers with each 512 bits storage
38        capacity instead of the delay line. Thus the device had
39        about 20 kbit storage capacity, so the metallic boot tape could be
40        extended: The new boot tape had 3 tracks (including one timing track).
41        While the first track was read in while moving the tape forward, the
42        second one was read in while rewinding the tape. This "boot device"
43        contained micro programs for scientifical functions (sin, cos, tan,
44        ln, exp, etc.). If the computer was intended for e.g. statistical
45        functions, it needed another boot tape.
46        <br/>These Diehl computers look like the Combitronic, but they are
47        equipped with a few more keys. All in all the hardware architecture
48        from this desk computer was obsolete, even for that time. It was
49        partily still made using germanium transistors. After these computers,
50        Diehl built the completely new computer "Alphatronic, DS 300, DS 400"
51        that is no more interesting for our museum.</p>
52</div>
53
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55<!--#include virtual="/en/inc/menu.inc.shtm" -->
56</body>
57</html>
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