{"id":4416,"date":"2018-04-11T11:23:00","date_gmt":"2018-04-11T11:23:00","guid":{"rendered":"http:\/\/www.ti99.eu\/?page_id=4416"},"modified":"2025-06-01T20:37:10","modified_gmt":"2025-06-01T20:37:10","slug":"texas-instruments-ds990-commercial-computer-system","status":"publish","type":"page","link":"https:\/\/www.ti99.eu\/?page_id=4416&lang=en","title":{"rendered":"Texas Instruments DS990 Commercial Computer System"},"content":{"rendered":"<h3>DS990\/1 aka DS990 Model 1 Intelligent Terminal<\/h3>\n<p>This machine is the latest addition and currently not in working condition. I only have it since march 2018. The power supply logic of the main unit is currently analyzed. It was also available as upgrade of a Texas Instruments Series 700 Intelligent Terminal, Model 770 or Model 771. My computer seems to be based on a Model 771, at least the name of the 64 KByte Ram card even includes 771 in its name.<\/p>\n\n\t\t<style type=\"text\/css\">\n\t\t\t#gallery-1 {\n\t\t\t\tmargin: auto;\n\t\t\t}\n\t\t\t#gallery-1 .gallery-item {\n\t\t\t\tfloat: left;\n\t\t\t\tmargin-top: 10px;\n\t\t\t\ttext-align: center;\n\t\t\t\twidth: 50%;\n\t\t\t}\n\t\t\t#gallery-1 img {\n\t\t\t\tborder: 2px solid #cfcfcf;\n\t\t\t}\n\t\t\t#gallery-1 .gallery-caption {\n\t\t\t\tmargin-left: 0;\n\t\t\t}\n\t\t\t\/* see gallery_shortcode() in wp-includes\/media.php *\/\n\t\t<\/style>\n\t\t<div id='gallery-1' class='gallery galleryid-4416 gallery-columns-2 gallery-size-medium'><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/www.ti99.eu\/?attachment_id=4421'><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"225\" src=\"https:\/\/www.ti99.eu\/wp-content\/uploads\/2018\/04\/IMG_20180313_071330-300x225.jpg\" class=\"attachment-medium size-medium\" alt=\"\" srcset=\"https:\/\/www.ti99.eu\/wp-content\/uploads\/2018\/04\/IMG_20180313_071330-300x225.jpg 300w, https:\/\/www.ti99.eu\/wp-content\/uploads\/2018\/04\/IMG_20180313_071330-768x576.jpg 768w, https:\/\/www.ti99.eu\/wp-content\/uploads\/2018\/04\/IMG_20180313_071330-1024x768.jpg 1024w, https:\/\/www.ti99.eu\/wp-content\/uploads\/2018\/04\/IMG_20180313_071330-624x468.jpg 624w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a>\n\t\t\t<\/dt><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/www.ti99.eu\/?attachment_id=4419'><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"225\" src=\"https:\/\/www.ti99.eu\/wp-content\/uploads\/2018\/04\/IMG_20180313_065030-300x225.jpg\" class=\"attachment-medium size-medium\" alt=\"\" srcset=\"https:\/\/www.ti99.eu\/wp-content\/uploads\/2018\/04\/IMG_20180313_065030-300x225.jpg 300w, https:\/\/www.ti99.eu\/wp-content\/uploads\/2018\/04\/IMG_20180313_065030-768x576.jpg 768w, https:\/\/www.ti99.eu\/wp-content\/uploads\/2018\/04\/IMG_20180313_065030-1024x768.jpg 1024w, https:\/\/www.ti99.eu\/wp-content\/uploads\/2018\/04\/IMG_20180313_065030-624x468.jpg 624w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a>\n\t\t\t<\/dt><\/dl><br style=\"clear: both\" \/><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/www.ti99.eu\/?attachment_id=4425'><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"225\" src=\"https:\/\/www.ti99.eu\/wp-content\/uploads\/2018\/04\/IMG_20180318_105529-300x225.jpg\" class=\"attachment-medium size-medium\" alt=\"\" srcset=\"https:\/\/www.ti99.eu\/wp-content\/uploads\/2018\/04\/IMG_20180318_105529-300x225.jpg 300w, https:\/\/www.ti99.eu\/wp-content\/uploads\/2018\/04\/IMG_20180318_105529-768x576.jpg 768w, https:\/\/www.ti99.eu\/wp-content\/uploads\/2018\/04\/IMG_20180318_105529-1024x768.jpg 1024w, https:\/\/www.ti99.eu\/wp-content\/uploads\/2018\/04\/IMG_20180318_105529-624x468.jpg 624w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a>\n\t\t\t<\/dt><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/www.ti99.eu\/?attachment_id=4426'><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"225\" src=\"https:\/\/www.ti99.eu\/wp-content\/uploads\/2018\/04\/IMG_20180318_105552-300x225.jpg\" class=\"attachment-medium size-medium\" alt=\"\" srcset=\"https:\/\/www.ti99.eu\/wp-content\/uploads\/2018\/04\/IMG_20180318_105552-300x225.jpg 300w, https:\/\/www.ti99.eu\/wp-content\/uploads\/2018\/04\/IMG_20180318_105552-768x576.jpg 768w, https:\/\/www.ti99.eu\/wp-content\/uploads\/2018\/04\/IMG_20180318_105552-1024x768.jpg 1024w, https:\/\/www.ti99.eu\/wp-content\/uploads\/2018\/04\/IMG_20180318_105552-624x468.jpg 624w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a>\n\t\t\t<\/dt><\/dl><br style=\"clear: both\" \/>\n\t\t<\/div>\n\n<h4>DS990\/1 Intelligent Terminal<\/h4>\n<p>Part Number: 2263583-0005<br \/>\nSerial Number: 02781 02182<br \/>\nVolts: 220\/240 V<br \/>\nFrequency: 50\/60<br \/>\nWatts: 200W<\/p>\n<h4>Intelligent Terminal Motherboard<\/h4>\n<p>Assy No. 993032-000<br \/>\nDiagram No. 993030<br \/>\nBoard No. 993031-000<\/p>\n<h4>Motherboard Slot \/ Color \/ Assy \/ Diagram \/ Board \/ Label<\/h4>\n<p><strong>A13<\/strong> | Yellow | ASSY 993316-000 | Diagram No. 993314 | Board No. 993315-0001 |\u00a0 <strong>AUXILIARY POWER SUPPLY<\/strong> (PCC1V0)<br \/>\n<strong>A14<\/strong> | Orange | ASSY 993307-000 | Diagram No. 993305 | Board No. 993306-0001C | <strong>5 VOLT REGULATOR<\/strong> (PCC1V0)<br \/>\n<strong>A15<\/strong> | Red | ASSY 993310-000 | Diagram No. 993308 | Board No. 993309-0001B | <strong>12 VOLT REGULATOR<\/strong> (PCC1V0)<br \/>\nA16 | <em>nothing installed (propably meant for a 32 Volt Regulator)<br \/>\n<\/em><\/p>\n<p>A12 | <em>nothing installed<\/em><br \/>\nA11 | <em>nothing installed<\/em><br \/>\nA10 | <em>nothing installed<\/em><br \/>\n<strong>A9<\/strong> | Black | ASSY 993059-0001 | Diagram No. 993057 | Board No. 993058-0011 | <strong>ASYNCHRONOUS DATA SET INTERFACE<\/strong><br \/>\nA8 | <em>nothing installed<\/em><br \/>\nA7 | <em>nothing installed<\/em><br \/>\n<strong>A6<\/strong> | Blue | ASSY 993415-000 | Diagram No. 993417 | PVB993416-0001 | <strong>PROCESSOR<\/strong><br \/>\n<strong>A5<\/strong> | Green | ASSY 2267360-000 | Schema 2267362 | PWB 2267361-0001 | <strong>771 64K BYTE RAM<\/strong><br \/>\n<strong>A4<\/strong> | Yellow | ASSY 993420-000 | Diagram No. 993422 | Board No. 993421-0001 | <strong>VDU CONTROLLER<\/strong><br \/>\n<strong>A3<\/strong> | Orange | ASSY 2267350-0001 | Schema 2267352-0001 | PWB 2267351-0001\u00a0 <strong>FLOPPY DISK CONTROLLER I\/F<\/strong><br \/>\n<strong>A2<\/strong> | Red | ASSY 2267355-000 | Schema 2267357 | PWB 2267356-0001 | <strong>I\/O PROCESSOR<\/strong><br \/>\nA1 | <em>nothing installed<\/em><\/p>\n<h3>FD1000 Flexible Disk, either one or two 8 inch disk drives<\/h3>\n<p>While the Model 771 was a true Intelligent Terminal, running from Eproms, the DS990\/1 was usually used together with a FD1000 and loaded its operating system from an 8 inch Disk.<\/p>\n\n\t\t<style type=\"text\/css\">\n\t\t\t#gallery-2 {\n\t\t\t\tmargin: auto;\n\t\t\t}\n\t\t\t#gallery-2 .gallery-item {\n\t\t\t\tfloat: left;\n\t\t\t\tmargin-top: 10px;\n\t\t\t\ttext-align: center;\n\t\t\t\twidth: 50%;\n\t\t\t}\n\t\t\t#gallery-2 img {\n\t\t\t\tborder: 2px solid #cfcfcf;\n\t\t\t}\n\t\t\t#gallery-2 .gallery-caption {\n\t\t\t\tmargin-left: 0;\n\t\t\t}\n\t\t\t\/* see gallery_shortcode() in wp-includes\/media.php *\/\n\t\t<\/style>\n\t\t<div id='gallery-2' class='gallery galleryid-4416 gallery-columns-2 gallery-size-medium'><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/www.ti99.eu\/?attachment_id=4422'><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"225\" src=\"https:\/\/www.ti99.eu\/wp-content\/uploads\/2018\/04\/IMG_20180313_071341-300x225.jpg\" class=\"attachment-medium size-medium\" alt=\"\" srcset=\"https:\/\/www.ti99.eu\/wp-content\/uploads\/2018\/04\/IMG_20180313_071341-300x225.jpg 300w, https:\/\/www.ti99.eu\/wp-content\/uploads\/2018\/04\/IMG_20180313_071341-768x576.jpg 768w, https:\/\/www.ti99.eu\/wp-content\/uploads\/2018\/04\/IMG_20180313_071341-1024x768.jpg 1024w, https:\/\/www.ti99.eu\/wp-content\/uploads\/2018\/04\/IMG_20180313_071341-624x468.jpg 624w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a>\n\t\t\t<\/dt><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/www.ti99.eu\/?attachment_id=4428'><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"225\" src=\"https:\/\/www.ti99.eu\/wp-content\/uploads\/2018\/04\/IMG_20180313_081252-300x225.jpg\" class=\"attachment-medium size-medium\" alt=\"\" srcset=\"https:\/\/www.ti99.eu\/wp-content\/uploads\/2018\/04\/IMG_20180313_081252-300x225.jpg 300w, https:\/\/www.ti99.eu\/wp-content\/uploads\/2018\/04\/IMG_20180313_081252-768x576.jpg 768w, https:\/\/www.ti99.eu\/wp-content\/uploads\/2018\/04\/IMG_20180313_081252-1024x768.jpg 1024w, https:\/\/www.ti99.eu\/wp-content\/uploads\/2018\/04\/IMG_20180313_081252-624x468.jpg 624w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a>\n\t\t\t<\/dt><\/dl><br style=\"clear: both\" \/>\n\t\t<\/div>\n\n<h3>Linking some documents and software for now:<\/h3>\n<p><a href=\"http:\/\/bitsavers.informatik.uni-stuttgart.de\/bits\/TI\/990\/DS990-1_ROMs.zip\">DS990-1_ROMs.zip<\/a><\/p>\n<p><a href=\"http:\/\/bitsavers.informatik.uni-stuttgart.de\/pdf\/ti\/terminal\/silent_700\/993023-9701_Operating_Instructions_for_Model_770_Intelligent_Data_Terminal.pdf\">993023-9701, 30th June 1977, Operating Instructions for Model 770 Intelligent Data Terminal<\/a><\/p>\n<p><a href=\"http:\/\/bitsavers.informatik.uni-stuttgart.de\/pdf\/ti\/990\/ds990\/2262325-9701_DS990_System_Model_1_Site_Preparation_and_Installation.pdf\">2262325-9701, 15th February 1979, DS990 System Model 1 Site Preparation and Installation<\/a><\/p>\n<p><a href=\"http:\/\/bitsavers.informatik.uni-stuttgart.de\/pdf\/ti\/990\/ds990\/2262326-9701_Model_770_Intelligent_Data_Terminal_Upgrade_Instructions_to_DS990_System_Model_1.pdf\">2262326-9701, 15th February 1979, Model 770 Intelligent Data Terminal Upgrade Instructions to DS990 System Model 1<\/a><\/p>\n<p><a href=\"http:\/\/bitsavers.informatik.uni-stuttgart.de\/pdf\/ti\/990\/ds990\/2262327-9701_Model_771_Intelligent_Data_Terminal_Upgrade_Instructions_to_DS990_System_Model_1.pdf\">2262327-9701, 31th March 1979, Model 771 Intelligent Data Terminal Upgrade Instructions to DS990 System Model 1<\/a><\/p>\n<p><a href=\"http:\/\/bitsavers.informatik.uni-stuttgart.de\/pdf\/ti\/990\/ds990\/2262570-9701A_DS990_System_Model_1_Field_Maintenance_Test_Operating_Procedures.pdf\">2262570-9701, 1th November 1979, DS990 System Model 1 Field Maintenance Test Operating Procedures<\/a><\/p>\n<p><a href=\"http:\/\/bitsavers.informatik.uni-stuttgart.de\/pdf\/ti\/990\/disk\/2261885-9701_FD1000depotVo1_Jan81.pdf\">2261885-9701, 15th January 1981, Model 990 Computer<br \/>\nModel FD1000 Flexible Disk Controller and International Chassis Power Supply, Depot Maintenance Manual, Volume 1<\/a><\/p>\n<p><a href=\"http:\/\/bitsavers.informatik.uni-stuttgart.de\/pdf\/ti\/terminal\/brochures\/771_Intelligent_Terminal_Brochure_Jun78.pdf\">TI-715-10M-6\/78, June 1978, Model 771 Intelligent Terminal Brochure<\/a><\/p>\n<p><a href=\"http:\/\/bitsavers.informatik.uni-stuttgart.de\/pdf\/ti\/990\/brochures\/FD1000_Brochure_Jan79.pdf\">TI-589-10M-01\/79, January 1979, Model FD1000 Flexible-Disk System Brochure<\/a><\/p>\n<p><a href=\"http:\/\/bitsavers.informatik.uni-stuttgart.de\/pdf\/ti\/990\/brochures\/Texas_Instruments_1979_Computer_Family_Catalog_Jul79.pdf\">TI-557B-20M-7\/79, July 1979, Texas Instruments 1979 Computer Family Catalog<\/a><\/p>\n<p><a href=\"https:\/\/terminals-wiki.org\/wiki\/index.php\/TI_DS990\/1\">https:\/\/terminals-wiki.org\/wiki\/index.php\/TI_DS990\/1<\/a><\/p>\n<p><a href=\"http:\/\/www.old-computers.com\/museum\/computer.asp?st=1&#038;c=1025\">http:\/\/www.old-computers.com\/museum\/computer.asp?st=1&#038;c=1025<\/a><\/p>\n<p><a href=\"http:\/\/www.vcfed.org\/forum\/showthread.php?62002-Information-regarding-the-Texas-Instruments-DS990-1\">http:\/\/www.vcfed.org\/forum\/showthread.php?62002-Information-regarding-the-Texas-Instruments-DS990-1<\/a><\/p>\n<p><a href=\"https:\/\/groups.google.com\/forum\/#!topic\/comp.sys.ti\/8kJJddWbGOE\">https:\/\/groups.google.com\/forum\/#!topic\/comp.sys.ti\/8kJJddWbGOE<\/a><\/p>\n<p><a href=\"https:\/\/groups.google.com\/d\/msg\/comp.sys.ti\/lPC39Brf9HI\/on9iFuOxZwQJ\">https:\/\/groups.google.com\/d\/msg\/comp.sys.ti\/lPC39Brf9HI\/on9iFuOxZwQJ<\/a><\/p>\n<p><a href=\"https:\/\/groups.google.com\/d\/msg\/comp.sys.ti\/ySa3W2TBo_k\/JCji2S_IoxYJ\">https:\/\/groups.google.com\/d\/msg\/comp.sys.ti\/ySa3W2TBo_k\/JCji2S_IoxYJ<\/a><\/p>\n<p><a href=\"https:\/\/www.reddit.com\/r\/vintagecomputing\/comments\/7vvuf8\/texas_instruments_ds9901_request\">https:\/\/www.reddit.com\/r\/vintagecomputing\/comments\/7vvuf8\/texas_instruments_ds9901_request<\/a><\/p>\n<blockquote class=\"wp-embedded-content\" data-secret=\"Ykjf7PCXP0\"><p><a href=\"https:\/\/hackaday.com\/2017\/06\/30\/tms9900-retro-build\/\">TMS9900 Retro Build<\/a><\/p><\/blockquote>\n<p><iframe loading=\"lazy\" class=\"wp-embedded-content\" sandbox=\"allow-scripts\" security=\"restricted\" style=\"position: absolute; visibility: hidden;\" title=\"&#8220;TMS9900 Retro Build&#8221; &#8212; Hackaday\" src=\"https:\/\/hackaday.com\/2017\/06\/30\/tms9900-retro-build\/embed\/#?secret=x4zqkBVSm7#?secret=Ykjf7PCXP0\" data-secret=\"Ykjf7PCXP0\" width=\"600\" height=\"338\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\"><\/iframe><\/p>\n<p><a href=\"http:\/\/studieverzameling.utwente.nl\/documents\/Computer_collection.pdf\">http:\/\/studieverzameling.utwente.nl\/documents\/Computer_collection.pdf<\/a><\/p>\n<p><a href=\"https:\/\/forum.system-cfg.com\/viewtopic.php?f=10&#038;t=2385\">https:\/\/forum.system-cfg.com\/viewtopic.php?f=10&#038;t=2385<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>DS990\/1 aka DS990 Model 1 Intelligent Terminal This machine is the latest addition and currently not in working condition. I only have it since march 2018. The power supply logic of the main unit is currently analyzed. It was also available as upgrade of a Texas Instruments Series 700 Intelligent Terminal, Model 770 or Model [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-4416","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.ti99.eu\/index.php?rest_route=\/wp\/v2\/pages\/4416","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ti99.eu\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.ti99.eu\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.ti99.eu\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ti99.eu\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=4416"}],"version-history":[{"count":43,"href":"https:\/\/www.ti99.eu\/index.php?rest_route=\/wp\/v2\/pages\/4416\/revisions"}],"predecessor-version":[{"id":4468,"href":"https:\/\/www.ti99.eu\/index.php?rest_route=\/wp\/v2\/pages\/4416\/revisions\/4468"}],"wp:attachment":[{"href":"https:\/\/www.ti99.eu\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=4416"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}