{"id":1176,"date":"2015-02-10T14:30:27","date_gmt":"2015-02-10T18:30:27","guid":{"rendered":"http:\/\/www.wb4eje.com\/?p=1176"},"modified":"2015-05-07T13:41:10","modified_gmt":"2015-05-07T17:41:10","slug":"rope-memory","status":"publish","type":"post","link":"https:\/\/www.n4rfc.com\/?p=1176","title":{"rendered":"Rope Memory"},"content":{"rendered":"<p>I was watching a program today on the Science Channel called &#8220;Moon Machines &#8211; The Navigation Computer.&#8221; \u00a0This is a six part series that reviews the history of the development of the systems required to complete the Apollo mission to the moon. \u00a0This particular episode was on the development of the Navigation Computer used in the command module and the landing computer used in the Lunar Lander. \u00a0This was in the late sixties and computers were not what they are today. \u00a0The navigation computer has about 72Kbytes for program storage. \u00a0The software was being developed at the MIT Instrument Lab. \u00a0To store the program in the Navigation Computer they used Rope Memory. \u00a0 This is a version of Core Memory technology that can be used as a Read Only Memory to store programs. \u00a0I had never heard of Rope Memory and I have been around computers for a very long time!<\/p>\n<p>By weaving the sense wires through or around the cores of the memory they can hardware the program into the computers memory system. \u00a0Here are a couple of photos of the Rope Memory.<\/p>\n<div id=\"attachment_1178\" style=\"width: 310px\" class=\"wp-caption alignleft\"><a href=\"https:\/\/www.n4rfc.com\/wp-content\/uploads\/2015\/02\/Screen-shot-2011-01-26-at-9.34.57-AM.png\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-1178\" class=\"size-medium wp-image-1178\" src=\"https:\/\/www.n4rfc.com\/wp-content\/uploads\/2015\/02\/Screen-shot-2011-01-26-at-9.34.57-AM-300x187.png\" alt=\"A Rope Memory  board having a program &quot;threaded&quot; into the memory.\" width=\"300\" height=\"187\" srcset=\"https:\/\/www.n4rfc.com\/wp-content\/uploads\/2015\/02\/Screen-shot-2011-01-26-at-9.34.57-AM-300x187.png 300w, https:\/\/www.n4rfc.com\/wp-content\/uploads\/2015\/02\/Screen-shot-2011-01-26-at-9.34.57-AM-1024x640.png 1024w, https:\/\/www.n4rfc.com\/wp-content\/uploads\/2015\/02\/Screen-shot-2011-01-26-at-9.34.57-AM.png 1280w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><p id=\"caption-attachment-1178\" class=\"wp-caption-text\">A Rope Memory board having a program &#8220;threaded&#8221; into the memory.<\/p><\/div>\n<div id=\"attachment_1177\" style=\"width: 310px\" class=\"wp-caption alignleft\"><a href=\"https:\/\/www.n4rfc.com\/wp-content\/uploads\/2015\/02\/Screen-shot-2011-01-26-at-9.32.12-AM.png\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-1177\" class=\"size-medium wp-image-1177\" src=\"https:\/\/www.n4rfc.com\/wp-content\/uploads\/2015\/02\/Screen-shot-2011-01-26-at-9.32.12-AM-300x187.png\" alt=\"A Rope Memory wired with a program.\" width=\"300\" height=\"187\" srcset=\"https:\/\/www.n4rfc.com\/wp-content\/uploads\/2015\/02\/Screen-shot-2011-01-26-at-9.32.12-AM-300x187.png 300w, https:\/\/www.n4rfc.com\/wp-content\/uploads\/2015\/02\/Screen-shot-2011-01-26-at-9.32.12-AM-1024x640.png 1024w, https:\/\/www.n4rfc.com\/wp-content\/uploads\/2015\/02\/Screen-shot-2011-01-26-at-9.32.12-AM.png 1280w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><p id=\"caption-attachment-1177\" class=\"wp-caption-text\">A Rope Memory wired with a program.<\/p><\/div>\n","protected":false},"excerpt":{"rendered":"<p>I was watching a program today on the Science Channel called &#8220;Moon Machines &#8211; The Navigation Computer.&#8221; \u00a0This is a six part series that reviews the history of the development of the systems required to complete the Apollo mission to the moon. \u00a0This particular episode was on the development of the Navigation Computer used in [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7,10],"tags":[],"class_list":["post-1176","post","type-post","status-publish","format-standard","hentry","category-amateur-radio","category-technology"],"_links":{"self":[{"href":"https:\/\/www.n4rfc.com\/index.php?rest_route=\/wp\/v2\/posts\/1176","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.n4rfc.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.n4rfc.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.n4rfc.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.n4rfc.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1176"}],"version-history":[{"count":3,"href":"https:\/\/www.n4rfc.com\/index.php?rest_route=\/wp\/v2\/posts\/1176\/revisions"}],"predecessor-version":[{"id":1196,"href":"https:\/\/www.n4rfc.com\/index.php?rest_route=\/wp\/v2\/posts\/1176\/revisions\/1196"}],"wp:attachment":[{"href":"https:\/\/www.n4rfc.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1176"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.n4rfc.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1176"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.n4rfc.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1176"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}