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http://fileformats.archiveteam.org/index.php?action=history&feed=atom&title=PDP-1_alphanumeric_codes 2024-12-30T12:38:13Z Revision history for this page on the wiki MediaWiki 1.19.2
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http://fileformats.archiveteam.org/index.php?title=PDP-1_alphanumeric_codes&diff=24969&oldid=prev 2016-03-11T20:20:05Z

<p>Category:Digital Equipment Corporation</p> <table class='diff diff-contentalign-left'> <col class='diff-marker' /> <col class='diff-content' /> <col class='diff-marker' /> <col class='diff-content' /> <tr valign='top'> <td colspan='2' style="background-color: white; color:black;">← Older revision</td> <td colspan='2' style="background-color: white; color:black;">Revision as of 20:20, 11 March 2016</td> </tr><tr><td colspan="2" class="diff-lineno">Line 11:</td> <td colspan="2" class="diff-lineno">Line 11:</td></tr> <br /> <b>Warning</b>: require(): Unable to allocate memory for pool. in <b>/usr/local/www/mediawiki/includes/AutoLoader.php</b> on line <b>1007</b><br /> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>* [https://archive.org/stream/bitsavers_decpdp1F15_2666384/F15_PDP1_Handbook_Apr60#page/n15/mode/2up 1960 manual showing Friden and Concise codes]</div></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>* [https://archive.org/stream/bitsavers_decpdp1F15_2666384/F15_PDP1_Handbook_Apr60#page/n15/mode/2up 1960 manual showing Friden and Concise codes]</div></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>* [https://archive.org/stream/bitsavers_decpdp1F17_28841238/F17_PDP1Maint_1962#page/n123/mode/2up 1962 manual showing FIO-DEC and Concise codes]</div></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>* [https://archive.org/stream/bitsavers_decpdp1F17_28841238/F17_PDP1Maint_1962#page/n123/mode/2up 1962 manual showing FIO-DEC and Concise codes]</div></td></tr> <tr><td colspan="2">&#160;</td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;"></ins></div></td></tr> <tr><td colspan="2">&#160;</td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;">[[Category:Digital Equipment Corporation]]</ins></div></td></tr> </table>

Jsummers http://fileformats.archiveteam.org/index.php?title=PDP-1_alphanumeric_codes&diff=24745&oldid=prev 2016-03-04T22:20:42Z

<p></p> <table class='diff diff-contentalign-left'> <col class='diff-marker' /> <col class='diff-content' /> <col class='diff-marker' /> <col class='diff-content' /> <tr valign='top'> <td colspan='2' style="background-color: white; color:black;">← Older revision</td> <td colspan='2' style="background-color: white; color:black;">Revision as of 22:20, 4 March 2016</td> </tr><tr><td colspan="2" class="diff-lineno">Line 1:</td> <td colspan="2" class="diff-lineno">Line 1:</td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>{{FormatInfo</div></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>{{FormatInfo</div></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>|formattype=electronic</div></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>|formattype=electronic</div></td></tr> <tr><td class='diff-marker'>−</td><td style="background: #ffa; color:black; font-size: smaller;"><div>|subcat=Character <del class="diffchange diffchange-inline">Encodings</del></div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>|subcat=Character <ins class="diffchange diffchange-inline">encoding</ins></div></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>|released=1959</div></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>|released=1959</div></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>}}</div></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>}}</div></td></tr> </table>

Jsummers http://fileformats.archiveteam.org/index.php?title=PDP-1_alphanumeric_codes&diff=17269&oldid=prev 2014-04-28T23:40:36Z

<p>Created page with &quot;{{FormatInfo |formattype=electronic |subcat=Character Encodings |released=1959 }} The &#039;&#039;&#039;PDP-1 alphanumeric codes&#039;&#039;&#039; were used to encode text characters for input and output o...&quot;</p> <p><b>New page</b></p><div>{{FormatInfo<br /> |formattype=electronic<br /> |subcat=Character Encodings<br /> |released=1959<br /> }}<br /> The '''PDP-1 alphanumeric codes''' were used to encode text characters for input and output on a DEC PDP-1, a computer model that was available from 1959 to 1969. The introduction of this model predated the creation of [[ASCII]], so (as was common in the early computer industry) a proprietary coding was used.<br /> <br /> Several different codings were used, actually; the manuals show at least three, Friden Code, FIO-DEC Code, and Concise Code. They each assigned different code points to the various letters, numbers, punctuation, and control characters. Concise codes were two-digit numbers, but were not always consecutive for letters of the alphabet; A through G were 61 through 67, but H was 70 and J was 41. Friden Codes used three digit numbers, while FIO-DEC codes used a mixture of two and three digit numbers, most of which were either equal to the Concise Code or to the Concise Code with another digit placed before it.<br /> <br /> == Links ==<br /> * [https://archive.org/stream/bitsavers_decpdp1F15_2666384/F15_PDP1_Handbook_Apr60#page/n15/mode/2up 1960 manual showing Friden and Concise codes]<br /> * [https://archive.org/stream/bitsavers_decpdp1F17_28841238/F17_PDP1Maint_1962#page/n123/mode/2up 1962 manual showing FIO-DEC and Concise codes]</div>

Dan Tobias
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