{"id":884,"date":"2016-07-25T22:33:02","date_gmt":"2016-07-25T22:33:02","guid":{"rendered":"http:\/\/avitech.com.au\/?p=884"},"modified":"2016-07-25T22:38:16","modified_gmt":"2016-07-25T22:38:16","slug":"pdp-1134-decdatasystem","status":"publish","type":"post","link":"https:\/\/avitech.com.au\/?p=884","title":{"rendered":"PDP-11\/34 decdatasystem"},"content":{"rendered":"<p>Last weekend I started to investigate a &#8220;decdatasystem&#8221; in my collection.<\/p>\n<p>I thought I only had the TU10W tape drive and RK07 hard drive.<\/p>\n<p>I was very surprised to find that below the TU10W is an entire PDP-11\/34 chassis with the controllers for both drives.<\/p>\n<div data-carousel-extra='{&quot;blog_id&quot;:1,&quot;permalink&quot;:&quot;https:\/\/avitech.com.au\/?p=884&quot;}' id='gallery-1' class='gallery galleryid-884 gallery-columns-4 gallery-size-medium'><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon portrait'>\n\t\t\t\t<a href=\"https:\/\/i0.wp.com\/avitech.com.au\/wp-content\/uploads\/2016\/07\/decdatasystem-front-1.jpg?ssl=1\"><img loading=\"lazy\" decoding=\"async\" width=\"148\" height=\"300\" src=\"https:\/\/i0.wp.com\/avitech.com.au\/wp-content\/uploads\/2016\/07\/decdatasystem-front-1.jpg?fit=148%2C300&amp;ssl=1\" class=\"attachment-medium size-medium\" alt=\"\" srcset=\"https:\/\/i0.wp.com\/avitech.com.au\/wp-content\/uploads\/2016\/07\/decdatasystem-front-1.jpg?w=778&amp;ssl=1 778w, https:\/\/i0.wp.com\/avitech.com.au\/wp-content\/uploads\/2016\/07\/decdatasystem-front-1.jpg?resize=148%2C300&amp;ssl=1 148w, https:\/\/i0.wp.com\/avitech.com.au\/wp-content\/uploads\/2016\/07\/decdatasystem-front-1.jpg?resize=768%2C1556&amp;ssl=1 768w, https:\/\/i0.wp.com\/avitech.com.au\/wp-content\/uploads\/2016\/07\/decdatasystem-front-1.jpg?resize=506%2C1024&amp;ssl=1 506w, https:\/\/i0.wp.com\/avitech.com.au\/wp-content\/uploads\/2016\/07\/decdatasystem-front-1.jpg?resize=74%2C150&amp;ssl=1 74w, https:\/\/i0.wp.com\/avitech.com.au\/wp-content\/uploads\/2016\/07\/decdatasystem-front-1.jpg?resize=300%2C608&amp;ssl=1 300w\" sizes=\"auto, (max-width: 148px) 100vw, 148px\" data-attachment-id=\"885\" data-permalink=\"https:\/\/avitech.com.au\/?attachment_id=885\" data-orig-file=\"https:\/\/i0.wp.com\/avitech.com.au\/wp-content\/uploads\/2016\/07\/decdatasystem-front-1.jpg?fit=778%2C1576&amp;ssl=1\" data-orig-size=\"778,1576\" data-comments-opened=\"1\" data-image-title=\"decdatasystem-front-1\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/avitech.com.au\/wp-content\/uploads\/2016\/07\/decdatasystem-front-1.jpg?fit=506%2C1024&amp;ssl=1\" \/><\/a>\n\t\t\t<\/dt><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon portrait'>\n\t\t\t\t<a href=\"https:\/\/i0.wp.com\/avitech.com.au\/wp-content\/uploads\/2016\/07\/decdatasystem-front-panel-removed.jpg?ssl=1\"><img loading=\"lazy\" decoding=\"async\" width=\"169\" height=\"300\" src=\"https:\/\/i0.wp.com\/avitech.com.au\/wp-content\/uploads\/2016\/07\/decdatasystem-front-panel-removed.jpg?fit=169%2C300&amp;ssl=1\" class=\"attachment-medium size-medium\" alt=\"\" srcset=\"https:\/\/i0.wp.com\/avitech.com.au\/wp-content\/uploads\/2016\/07\/decdatasystem-front-panel-removed.jpg?w=918&amp;ssl=1 918w, https:\/\/i0.wp.com\/avitech.com.au\/wp-content\/uploads\/2016\/07\/decdatasystem-front-panel-removed.jpg?resize=169%2C300&amp;ssl=1 169w, https:\/\/i0.wp.com\/avitech.com.au\/wp-content\/uploads\/2016\/07\/decdatasystem-front-panel-removed.jpg?resize=768%2C1365&amp;ssl=1 768w, https:\/\/i0.wp.com\/avitech.com.au\/wp-content\/uploads\/2016\/07\/decdatasystem-front-panel-removed.jpg?resize=576%2C1024&amp;ssl=1 576w, https:\/\/i0.wp.com\/avitech.com.au\/wp-content\/uploads\/2016\/07\/decdatasystem-front-panel-removed.jpg?resize=84%2C150&amp;ssl=1 84w, https:\/\/i0.wp.com\/avitech.com.au\/wp-content\/uploads\/2016\/07\/decdatasystem-front-panel-removed.jpg?resize=300%2C533&amp;ssl=1 300w\" sizes=\"auto, (max-width: 169px) 100vw, 169px\" data-attachment-id=\"891\" data-permalink=\"https:\/\/avitech.com.au\/?attachment_id=891\" data-orig-file=\"https:\/\/i0.wp.com\/avitech.com.au\/wp-content\/uploads\/2016\/07\/decdatasystem-front-panel-removed.jpg?fit=918%2C1632&amp;ssl=1\" data-orig-size=\"918,1632\" data-comments-opened=\"1\" data-image-title=\"decdatasystem-front-panel-removed\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/avitech.com.au\/wp-content\/uploads\/2016\/07\/decdatasystem-front-panel-removed.jpg?fit=576%2C1024&amp;ssl=1\" \/><\/a>\n\t\t\t<\/dt><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon portrait'>\n\t\t\t\t<a href=\"https:\/\/i0.wp.com\/avitech.com.au\/wp-content\/uploads\/2016\/07\/pdp1134-card-cage.jpg?ssl=1\"><img loading=\"lazy\" decoding=\"async\" width=\"169\" height=\"300\" src=\"https:\/\/i0.wp.com\/avitech.com.au\/wp-content\/uploads\/2016\/07\/pdp1134-card-cage.jpg?fit=169%2C300&amp;ssl=1\" class=\"attachment-medium size-medium\" alt=\"\" srcset=\"https:\/\/i0.wp.com\/avitech.com.au\/wp-content\/uploads\/2016\/07\/pdp1134-card-cage.jpg?w=918&amp;ssl=1 918w, https:\/\/i0.wp.com\/avitech.com.au\/wp-content\/uploads\/2016\/07\/pdp1134-card-cage.jpg?resize=169%2C300&amp;ssl=1 169w, https:\/\/i0.wp.com\/avitech.com.au\/wp-content\/uploads\/2016\/07\/pdp1134-card-cage.jpg?resize=768%2C1365&amp;ssl=1 768w, https:\/\/i0.wp.com\/avitech.com.au\/wp-content\/uploads\/2016\/07\/pdp1134-card-cage.jpg?resize=576%2C1024&amp;ssl=1 576w, https:\/\/i0.wp.com\/avitech.com.au\/wp-content\/uploads\/2016\/07\/pdp1134-card-cage.jpg?resize=84%2C150&amp;ssl=1 84w, https:\/\/i0.wp.com\/avitech.com.au\/wp-content\/uploads\/2016\/07\/pdp1134-card-cage.jpg?resize=300%2C533&amp;ssl=1 300w\" sizes=\"auto, (max-width: 169px) 100vw, 169px\" data-attachment-id=\"892\" data-permalink=\"https:\/\/avitech.com.au\/?attachment_id=892\" data-orig-file=\"https:\/\/i0.wp.com\/avitech.com.au\/wp-content\/uploads\/2016\/07\/pdp1134-card-cage.jpg?fit=918%2C1632&amp;ssl=1\" data-orig-size=\"918,1632\" data-comments-opened=\"1\" data-image-title=\"pdp1134-card-cage\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/avitech.com.au\/wp-content\/uploads\/2016\/07\/pdp1134-card-cage.jpg?fit=576%2C1024&amp;ssl=1\" \/><\/a>\n\t\t\t<\/dt><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon portrait'>\n\t\t\t\t<a href=\"https:\/\/i0.wp.com\/avitech.com.au\/wp-content\/uploads\/2016\/07\/rk07-1.jpg?ssl=1\"><img loading=\"lazy\" decoding=\"async\" width=\"169\" height=\"300\" src=\"https:\/\/i0.wp.com\/avitech.com.au\/wp-content\/uploads\/2016\/07\/rk07-1.jpg?fit=169%2C300&amp;ssl=1\" class=\"attachment-medium size-medium\" alt=\"\" srcset=\"https:\/\/i0.wp.com\/avitech.com.au\/wp-content\/uploads\/2016\/07\/rk07-1.jpg?w=918&amp;ssl=1 918w, https:\/\/i0.wp.com\/avitech.com.au\/wp-content\/uploads\/2016\/07\/rk07-1.jpg?resize=169%2C300&amp;ssl=1 169w, https:\/\/i0.wp.com\/avitech.com.au\/wp-content\/uploads\/2016\/07\/rk07-1.jpg?resize=768%2C1365&amp;ssl=1 768w, https:\/\/i0.wp.com\/avitech.com.au\/wp-content\/uploads\/2016\/07\/rk07-1.jpg?resize=576%2C1024&amp;ssl=1 576w, https:\/\/i0.wp.com\/avitech.com.au\/wp-content\/uploads\/2016\/07\/rk07-1.jpg?resize=84%2C150&amp;ssl=1 84w, https:\/\/i0.wp.com\/avitech.com.au\/wp-content\/uploads\/2016\/07\/rk07-1.jpg?resize=300%2C533&amp;ssl=1 300w\" sizes=\"auto, (max-width: 169px) 100vw, 169px\" data-attachment-id=\"886\" data-permalink=\"https:\/\/avitech.com.au\/?attachment_id=886\" data-orig-file=\"https:\/\/i0.wp.com\/avitech.com.au\/wp-content\/uploads\/2016\/07\/rk07-1.jpg?fit=918%2C1632&amp;ssl=1\" data-orig-size=\"918,1632\" data-comments-opened=\"1\" data-image-title=\"rk07-1\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/avitech.com.au\/wp-content\/uploads\/2016\/07\/rk07-1.jpg?fit=576%2C1024&amp;ssl=1\" \/><\/a>\n\t\t\t<\/dt><\/dl><br style=\"clear: both\" \/>\n\t\t<\/div>\n\n<p>More information available here -> <a href=\"https:\/\/avitech.com.au\/?page_id=903\" target=\"_blank\">PDP-11\/34 decdatasystem<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Last weekend I started to investigate a &#8220;decdatasystem&#8221; in my collection. I thought I only had the TU10W tape drive and RK07 hard drive. I was very surprised to find that below the TU10W is an entire PDP-11\/34 chassis with the controllers for both drives. More information available here -> PDP-11\/34 dec..<\/p>\n<div class=\"clear-fix\"><\/div>\n<p><a href=\"https:\/\/avitech.com.au\/?p=884\" title=\"read more...\">Read more<\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[1],"tags":[],"class_list":["post-884","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"jetpack_publicize_connections":[],"jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p7xTsk-eg","jetpack-related-posts":[{"id":3632,"url":"https:\/\/avitech.com.au\/?p=3632","url_meta":{"origin":884,"position":0},"title":"Webster Spectrum PDP-11\/73","author":"malcolm","date":"6-October-2019","format":false,"excerpt":"This is a PDP-11\/73 in a Webster Spectrum enclosure. The 11\/73 board (M8192) appears to be the only genuine DEC board in the backplane. The Spectrum is mounted in a half-height rack that also houses a Cipher tape drive. The Cipher tape drive is a Model F880640-90-1025U, with Option E\u2026","rel":"","context":"In &quot;PDP-11&quot;","block_context":{"text":"PDP-11","link":"https:\/\/avitech.com.au\/?cat=11"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/avitech.com.au\/wp-content\/uploads\/2019\/10\/IMG_20191006_194737.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/avitech.com.au\/wp-content\/uploads\/2019\/10\/IMG_20191006_194737.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/avitech.com.au\/wp-content\/uploads\/2019\/10\/IMG_20191006_194737.jpg?resize=525%2C300 1.5x, https:\/\/i0.wp.com\/avitech.com.au\/wp-content\/uploads\/2019\/10\/IMG_20191006_194737.jpg?resize=700%2C400 2x, https:\/\/i0.wp.com\/avitech.com.au\/wp-content\/uploads\/2019\/10\/IMG_20191006_194737.jpg?resize=1050%2C600 3x, https:\/\/i0.wp.com\/avitech.com.au\/wp-content\/uploads\/2019\/10\/IMG_20191006_194737.jpg?resize=1400%2C800 4x"},"classes":[]},{"id":1413,"url":"https:\/\/avitech.com.au\/?p=1413","url_meta":{"origin":884,"position":1},"title":"New neon indicator for DEC 871B Power Controller","author":"malcolm","date":"26-December-2016","format":false,"excerpt":"The 871B Power Controller is a single-phase 240VAC power controller found in some PDP-11 systems. It has 6 switched power sockets. One of my holiday projects was to replace the faulty neon indicator in this Power Controller. I have just posted a short webpage with some information about this repair,\u2026","rel":"","context":"In &quot;DEC&quot;","block_context":{"text":"DEC","link":"https:\/\/avitech.com.au\/?cat=2"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/avitech.com.au\/wp-content\/uploads\/2016\/12\/20161226_105815-Large-300x169.jpg?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":252,"url":"https:\/\/avitech.com.au\/?p=252","url_meta":{"origin":884,"position":2},"title":"VT220 current loop interface","author":"malcolm","date":"14-May-2016","format":false,"excerpt":"This post takes a brief look at the current loop connectors used by DEC. The main focus of this post is the cabling needed to connect a VT220 terminal to a computer (such as a PDP-11\/10) using the 20mA current loop interface. DEC's standard connector DEC used an 8-pin Mate-N-Lok\u2026","rel":"","context":"In &quot;Current loop&quot;","block_context":{"text":"Current loop","link":"https:\/\/avitech.com.au\/?cat=10"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/avitech.com.au\/wp-content\/uploads\/2016\/05\/conn-male-top.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/avitech.com.au\/wp-content\/uploads\/2016\/05\/conn-male-top.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/avitech.com.au\/wp-content\/uploads\/2016\/05\/conn-male-top.jpg?resize=525%2C300 1.5x, https:\/\/i0.wp.com\/avitech.com.au\/wp-content\/uploads\/2016\/05\/conn-male-top.jpg?resize=700%2C400 2x, https:\/\/i0.wp.com\/avitech.com.au\/wp-content\/uploads\/2016\/05\/conn-male-top.jpg?resize=1050%2C600 3x"},"classes":[]},{"id":3749,"url":"https:\/\/avitech.com.au\/?p=3749","url_meta":{"origin":884,"position":3},"title":"Freshly scanned manual for MDB MLSI-CR11 Card Reader Controller","author":"malcolm","date":"11-December-2019","format":false,"excerpt":"I came across a hardcopy manual for MDB's MLSI-CR11, which is a QBUS Card Reader Controller. It appears to be similar in function to the DEC CR11 UNIBUS controllers (M8290\/M8291) except that it has a 50-pin I\/O header instead of 40 pins. Freshly scanned manual can be found here ->\u2026","rel":"","context":"In &quot;PDP-11&quot;","block_context":{"text":"PDP-11","link":"https:\/\/avitech.com.au\/?cat=11"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/avitech.com.au\/wp-content\/uploads\/2019\/12\/mdb-mlsi-cr11-front-cover-232x300.jpg?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":1285,"url":"https:\/\/avitech.com.au\/?p=1285","url_meta":{"origin":884,"position":4},"title":"[Outdated post] Vintage computers for sale or swap","author":"malcolm","date":"13-October-2016","format":false,"excerpt":"15-May-2021: Note this is a very old post - most of the items below are no longer available. It's time to thin out my vintage computer collection a little. Below is a list of items currently available. My order of priority for finding new homes for this equipment is as\u2026","rel":"","context":"With 40 comments","block_context":{"text":"With 40 comments","link":"https:\/\/avitech.com.au\/?p=1285#comments"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/avitech.com.au\/wp-content\/uploads\/2016\/05\/factory-20151007-143900-Medium.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/avitech.com.au\/wp-content\/uploads\/2016\/05\/factory-20151007-143900-Medium.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/avitech.com.au\/wp-content\/uploads\/2016\/05\/factory-20151007-143900-Medium.jpg?resize=525%2C300 1.5x, https:\/\/i0.wp.com\/avitech.com.au\/wp-content\/uploads\/2016\/05\/factory-20151007-143900-Medium.jpg?resize=700%2C400 2x, https:\/\/i0.wp.com\/avitech.com.au\/wp-content\/uploads\/2016\/05\/factory-20151007-143900-Medium.jpg?resize=1050%2C600 3x"},"classes":[]},{"id":605,"url":"https:\/\/avitech.com.au\/?p=605","url_meta":{"origin":884,"position":5},"title":"Imaging DEC VAX\/VMS CDs","author":"malcolm","date":"10-June-2016","format":false,"excerpt":"I have some original VMS CDROMs. I was looking for a way to image these (for use with SIMH) and also a way to write ISO images back to blank CDs, to use on real hardware. This should be a fairly simple process using a modern Linux computer and the\u2026","rel":"","context":"In &quot;VMS&quot;","block_context":{"text":"VMS","link":"https:\/\/avitech.com.au\/?cat=5"},"img":{"alt_text":"vaxvms061cd","src":"https:\/\/i0.wp.com\/avitech.com.au\/wp-content\/uploads\/2016\/06\/vaxvms061cd-300x300.jpg?resize=350%2C200","width":350,"height":200},"classes":[]}],"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/avitech.com.au\/index.php?rest_route=\/wp\/v2\/posts\/884","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/avitech.com.au\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/avitech.com.au\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/avitech.com.au\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/avitech.com.au\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=884"}],"version-history":[{"count":10,"href":"https:\/\/avitech.com.au\/index.php?rest_route=\/wp\/v2\/posts\/884\/revisions"}],"predecessor-version":[{"id":906,"href":"https:\/\/avitech.com.au\/index.php?rest_route=\/wp\/v2\/posts\/884\/revisions\/906"}],"wp:attachment":[{"href":"https:\/\/avitech.com.au\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=884"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/avitech.com.au\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=884"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/avitech.com.au\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=884"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}