source: t29-www/en/devices/threaded-rom.shtm @ 31

Last change on this file since 31 was 31, checked in by sven, 16 years ago

VERSION 5.8.0 GAMMA
===================

Im Rahmen des Zieles, alle Spezialseiten in das Seitendesign zu
integrieren (wie es mit der Univac-Kosten-Seite bereits gemacht
wurde) wurden zunächst alle englischen Extraseiten umgewandelt.

  • Spezialseitenredesign:
    • /en/devices/: Alle Seiten geändert
    • /shared/css/fresh.design.css: Einige Styles dafuer hinzugefuegt.
    • /en/inc/menu.inc.shtm: Extra-Anweisungen hinzugefuegt
    • /en/inc/head.inc.shtm: Fixes
  • Korrektur der Sprachabhängigkeit des Magnetdrahtspeicherbildes:
    • /shared/photos/rechnertechnik/speichermedien/magnetdrahtspeicher.jpg: Neues zweisprachiges Bild generiert
    • /en/computer/storage-media.shtm und /de/rechnertechnik/speichermedien.shtm dafuer geaendert
  • Andere allgemeine Berichtigungen (Fehler, etc.)

-- Sven @ workstation

  • Property svn:keywords set to Id
File size: 2.7 KB
Line 
1<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
2     "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
3<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="de">
4<head><!--#set var="title"        value="Details of the ROM"
5   --><!--#set var="location"     value="plated-wire-storage"
6   --><!--#set var="part"         value="extra"
7   --><!--#set var="url_de"       value="geraete/gefaedeltes-rom.shtm"
8   --><!--#set var="title_de"     value="Gefädeltes ROM"
9   --><!--#set var="prev"         value="/en/computer/storage-media.shtm#threaded-rom"
10   --><!--#set var="prev_title"   value="Storage Media: Threaded ROM"
11   --><!--#set var="next"         value=""
12   --><!--#set var="next_title"   value=""
13   --><title>technikum29 - <!--#echo var="title" --></title>
14
15    <!--#include virtual="/en/inc/head.inc.shtm" -->
16    <meta name="keywords" lang="en" content="" />
17    <meta name="DC.Title" content="technikum29 - <!--#echo var="title" -->" />
18    <meta name="t29.germanoriginal" content="17.08.2007/v5.7.1" />
19    <meta name="t29.thistranslation" content="12.09.2007/v5.7.7" />
20    <meta name="t29.comment" content="Neu eingeführt" />
21</head>
22<body>
23<!--#echo encoding="none" var="heading" -->
24<div id="content">
25    <h2 class="center"><!--#echo var="title" --></h2>
26
27<div class="center">
28   <img src="/shared/photos/rechnertechnik/speichermedien/nixdorf-rom-ausschnitt.jpg" alt="Nixdorf ROM" width="594" height="446" />
29   <div class="bildtext-bildbreite" style="width: 594px;">
30       <p>The idea is to represent every single bit by a tiny transformer with two separate windings. A primary winding and a secondary one (the latter one is threaded four times throught the core). The primary winding will by able to induce a signal in the secondary coil when threaded through the core. This is equivalent to storing a 1. To store a 0 the primary winding is threaded past the core.
31       <br/>The diode matrix on the right of the printed circuit board contains 8 times 16 diodes &ndash; this equals 128 wires which can be threaded through or past the cores of this ROM plane. Every wire runs in wiggly lines through 16 rows of 18 cores each. All in all 128 times 16 = 2048 bytes can be stored.
32       <br/>To change a word stored in this ROM, it is necessary to remove (or simply cut) the proper wire and thread a new wire (sometimes more than one wire has to be replaced). This tedious technique has been improved in form of the NIXDORF rod memory.
33       </p>
34
35      <!--
36      <ul id="nav">
37          <li><a href="/en/computer/storage-media.shtm#threaded-rom">Storage Media: Threaded ROM</a></li>
38          <li><a href="/en/">technikum29 homepage</a></li>
39      </ul>
40      -->
41   </div>
42</div>
43
44</div><!--content-->
45<!--#include virtual="/en/inc/menu.inc.shtm" -->
46</body>
47</html>
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