source: t29-www/en/devices/magnetic-stick-memory.php @ 287

Last change on this file since 287 was 287, checked in by sven, 12 years ago

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="The magnetic stick memory"
5   --><!--#set var="location"     value="magnetic-stick-memory"
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10   --><!--#set var="prev_title"   value="Storage media: Magnetic stick memory"
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15    <!--#include virtual="/en/inc/head.inc.shtm" -->
16    <meta name="keywords" lang="de" content="" />
17    <meta name="DC.Title" content="technikum29 - <!--#echo var="title" -->" />
18    <meta name="t29.SVN" content="$Id: magnetic-stick-memory.php 287 2012-08-16 09:02:07Z sven $" />
19    <meta name="t29.germanoriginal" content="17.08.2007/v5.7.1" />
20    <meta name="t29.thistranslation" content="16.09.2007/v5.7.8" />
21    <meta name="t29.comment" content="Neu eingeführt: Initialübersetzung von B.Ulmann" />
22</head>
23<body>
24<!--#echo encoding="none" var="heading" -->
25<div id="content">
26    <h2><!--#echo var="title" --></h2>
27
28<div class="center">
29   <img src="/shared/photos/rechnertechnik/speichermedien/staebchenspeicher.jpg" alt="magnetic stick memory" width="600" height="404" />
30   <div class="bildtext-bildbreite" style="width: 600px;"></div>
31       <p>This ROM consists of 8 times 18 = 144 ferrite rods with one secondary winding each which are mounted on the frame of the module. Every module features 256 wires acting as primary windings. To represent a 1 the primary winding of such a rod has to be threaded around the rod while threading it past the rod will yield a 0.
32       <br/>The pictures (taken from a NIXDORF manual) shows one of these 256 threading wires. The read out of the ROM is done in parallel, so there are 18 read out amplifiers connected to the 18 groups of secondary windings of the rod matrix.
33       <br/>The two words shown on the bottom have the values 111000000000001001 and 000111100000011100 respectively. Obviously threading up to 256 wires through and/or around 144 rods was a very time consuming and tedious job. The main advantage of this type of read only memory was the fact that its contents could still be modified manually.</p>
34       
35       <!--
36> ! Anmerkung: Solch ein Faedelspeicher wurde auch in den Bordrechnern der
37> ! Apollo-Raumkapseln eingesetzt (entwickelt am MIT), siehe "Journey to
38> ! the moon" bzw. die entsprechenden Unterlagen der Stark
39Draper-Laboratories,
40> ! die im Netz zu finden sind.
41       -->
42   
43</div>
44
45</div><!--content-->
46<!--#include virtual="/en/inc/menu.inc.shtm" -->
47</body>
48</html>
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