Changeset 30 in t29-www
- Timestamp:
- Aug 17, 2008, 10:53:27 PM (11 years ago)
- Location:
- en
- Files:
-
- 2 edited
-
computer/storage-media.shtm (modified) (2 diffs)
-
devices/plated-wire-storage.shtm (modified) (4 diffs)
Legend:
- Unmodified
- Added
- Removed
-
en/computer/storage-media.shtm
r16 r30 15 15 <meta name="DC.Title" content="Technikum29 - <!--#echo var="title" -->" /> 16 16 <meta name="DC.Subject" content="<!--#echo var="title" -->" /> 17 <meta name="t29.germanoriginal" content="08.04.2008/v5.7.21" /> 18 <meta name="t29.thistranslation" content="18.06.2008/v5.7.22" /> 19 <meta name="t29.comment" content="BULL GAMMA 3 Laufzeitspeicher neu" /> 17 <meta name="t29.SVN" content="$Id$" /> 18 <meta name="t29.germanoriginal" content="17.08.2008/v5.8" /> 19 <meta name="t29.thistranslation" content="17.08.2008/v5.8" /> 20 <meta name="t29.comment" content="plated wire storage new text + photo" /> 20 21 <!--changelog: 12.09.2007/v5.7.7 based on 17.07.2007/v5.7FINAL: Initialübersetzung von de dank B.Ullmann :-) --> 21 22 <!--changelog: 01.12.2007/v5.7.13 based on 22.08.2007/v5.7.5: Added plated wire storage --> 22 23 <!--changelog: 21.03.2008/v5.7.20 based on 18.02.2007/v5.7.18: Neues Kernspeicherbild uebernommen, Alt-Texte von Bildern uebersetzt --> 24 <!--changelog: 18.06.2008/v5.7.22 based on 08.04.2008/v5.7.21: BULL GAMMA 3 Laufzeitspeicher neu --> 23 25 </head> 24 26 <body> … … 119 121 <!-- Neu seit 01.12.07 --> 120 122 <h3><a name="plated-wire-storage">Plated wire storage</a></h3> 121 <a href="/en/devices/plated-wire-storage.shtm"><img src="/shared/photos/rechnertechnik/grafiken/magnetdrahtspeicher-uebersicht.en.gif" alt="Simplified diagram showing the plated wire storage" width="400" height="254" /></a> 123 <!--<a href="/en/devices/plated-wire-storage.shtm"><img src="/shared/photos/rechnertechnik/grafiken/magnetdrahtspeicher-uebersicht.en.gif" alt="Simplified diagram showing the plated wire storage" width="400" height="254" /></a>--> 124 <a href="/en/devices/plated-wire-storage.shtm"><img src="/shared/photos/rechnertechnik/speichermedien/magnetdrahtspeicher.jpg" alt="Photography from a plated wire storage, zoomed greatly" width="300" height="266" /></a> 122 125 123 <p>The plated wire storage was intended for replacing the core memory. Our 126 <!-- new text and image since 17.08.08 --> 127 <p>The plated wire storage was intended for replacing the core memory. Our 124 128 <a href="/en/devices/univac9400/univac_9300.shtm">UNIVAC 9300</a> is equipped 125 with this type of memory. Unfortunately it is very error-prone.</p> 126 127 <p>You can get <a class="go" href="/en/devices/plated-wire-storage.shtm">further informations and many graphics</a> by clicking on the picture.</p> 129 with this type of memory that was initially announced by UNIVAC for the new 130 UNIVAC 9000 series as a "technical revolution" in their magazine "The punch card" 131 in 1967.</p> 132 <p>While research and development in the Goddard Space Flight Center of the US space 133 program, NASA, the american government closed a deal with UNIVAC to develop a 134 storage medium with a total input power less then 1 Watt, non-destructive readout 135 (that is, no more neccessarity to write the informations after reading them), 136 high capacity, low cycle time and functionality in a temperature range from 137 -20° C to +50°C (-4°F to 122°F). 138 <br/>In this way the plated wire storage was developed, based on a cuple of 139 genious ideas. Unfortunately, nowadays it is very error-prone.</p> 140 <p>Clicking on the photography will yield further informations about the 141 <a class="go" href="/en/devices/plated-wire-storage.shtm">design of the plated 142 wire storage</a>.</p> 128 143 <div class="clear"></div> 129 144 </div> -
en/devices/plated-wire-storage.shtm
r7 r30 7 7 8 8 <!--#include virtual="/de/inc/extra-head.inc.shtm" --> 9 <meta name="t29.germanoriginal" content="21.10.2007/v5.7.10" /> 10 <meta name="t29.thistranslation" content="01.12.2007/v5.7.12" /> 11 <meta name="t29.this.comment" content="initialübersetzung von de" /> 9 <meta name="t29.SVN" content="$Id$" /> 10 <meta name="t29.germanoriginal" content="17.08.2008/v5.8.0" /> 11 <meta name="t29.thistranslation" content="17.08.2008/v5.8.0" /> 12 <meta name="t29.this.comment" content="several text improvements and new translations (new german text)" /> 13 <!--changelog: 01.12.2007/v5.7.12 based on 21.10.2007/v5.7.10: initialübersetzung von de --> 12 14 </head> 13 15 <body> … … 20 22 </div> 21 23 22 <p>In the early 1970s, magnetical core memory was quite expensive . The cycle time (time needed to read and rewrite the information) was quite big, because all information had to be rewritten after they had been read.24 <p>In the early 1970s, magnetical core memory was quite expensive and slow. That is, the cycle time (time needed to read and rewrite the information) was quite long, because all information had to be rewritten after they had been read. Furthermore the storage medium was not consistent, all stored informations vanished after the power supply was turned off. 23 25 <br/>As a replacement, the plated wire was invented, just before the first semiconductor memories were ready for beeing mass-produced. The plated wire consists of magnetic wire which replaces the cores (see picture at the right).</p> 26 <p>The installations from the UNIVAC 9000 series (like our <a href="/en/devices/univac9400/univac_9300.shtm">UNIVAC 9300</a>) were equipped with plated wire storages. We could offer pictures of our storage units, but the assembly of this type of memory is quite opaque. Therefore we publish self-drawn diagrams to illustrate the plated wire characteristics.</p> 24 27 25 <p> The installations from the UNIVAC 9000 series (like our <a href="/en/devices/univac9400/univac_9300.shtm">UNIVAC 9300</a>) were equipped with plated wire storages. We could offer pictures of our storage units, but the assembly of this type of memory is quite opaque. Therefore we publish self-drawn diagrams to illustrate the plated wire characteristics.</p>28 <p>From the physical point of view the magnetical core memory is a thin-film storage medium. The information carrier is a 1 micrometer thick permalloy solenoid film (the "word strap") that is stacked on the "plated wire", that is a beryllium copper wire with 0.13mm in diameter.</p> 26 29 27 30 <div class="box center" style="clear:right;"> … … 29 32 </div> 30 33 31 <p>Th eplated wire constists of copper with a thin film which consists of an iron-nickel alloy. These plated wires are embedded into word straps which are perpendicular to two sides of the plated wire. In the easy direction of magnetization (see diagram above), the magnet layer is quite stable, whereas it is unstable in the hard direction of magnetization.34 <p>That plated wire constists of copper with a thin film which consists of an iron-nickel alloy. These plated wires are embedded into word straps which are perpendicular to two sides of the plated wire. In the easy direction of magnetization (see diagram above), the magnet layer is quite stable, whereas it is unstable in the hard direction of magnetization. 32 35 <br/>To read the information, the word current is raised. The current will establish a magnetic field which tries to align the magnetization vector at the area in the plated wire covered by the word strap. 33 36 Lengthwise, the magnetic film is very hard to magnetize, therefore the vector only librates (insteads of rotating) <!--and falls back to the former position after the word current was lowered.--> … … 49 52 50 53 <ul id="nav"> 51 <li><a href="/en/computer/storage-media.shtm#plated-wire-storage">Storage media </a></li>54 <li><a href="/en/computer/storage-media.shtm#plated-wire-storage">Storage media: The plated wire storage</a></li> 52 55 <li><a href="/en/">technikum29 homepage</a></li> 53 56 </ul>
Note: See TracChangeset
for help on using the changeset viewer.
Powered by 
Expect where otherwise noted, content on this site is licensed under a