{"id":4387,"date":"2011-09-08T17:04:19","date_gmt":"2011-09-08T17:04:19","guid":{"rendered":"https:\/\/www.techopedia.com\/definition\/industry-standard-architecture\/"},"modified":"2017-06-20T11:52:32","modified_gmt":"2017-06-20T11:52:32","slug":"industry-standard-architecture","status":"publish","type":"definition","link":"https:\/\/www.techopedia.com\/definition\/5298\/industry-standard-architecture-isa","title":{"rendered":"Industry Standard Architecture"},"content":{"rendered":"<h2><span id=\"what_does_industry_standard_architecture_mean\">What Does Industry Standard Architecture Mean?<\/span><\/h2>\n<p>Industry Standard Architecture (ISA) is a computer bus specification used for 8-bit IBM-compatible systems. An ISA bus provides a basic route for peripheral devices that are attached to a motherboard to communicate with different circuits or other devices that are also attached to the same motherboard.\n<\/p>\n<p>Peripheral component interface (PCI) started replacing the ISA bus in the mid-&#8217;90s. New motherboards were manufactured with fewer ISA slots, and preference was given to PCI slots.\n<\/p>\n<h2><span id=\"techopedia_explains_industry_standard_architecture\">Techopedia Explains Industry Standard Architecture<\/span><\/h2>\n<p>Initially, an ISA bus was the best option for Intel machines. However, eventually a faster and wider bus was required, and an issue of incompatibility arose. The manufacturers relied on the same ISA bus but added 16-bit characteristics.\n<\/p>\n<p>The new ISA bus was flexible in that it could connect multiple devices. It supported 16-bit peripheral devices. Therefore, five devices with 16-bit interrupt request (IRQ) could be connected at the same time. Also, three additional devices could be connected parallel to five devices with 16-bit IRQ and a 16-bit direct memory access (DMA) channel. The CPU clock speed varied from 16 to 20 MHz.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>What Does Industry Standard Architecture Mean? Industry Standard Architecture (ISA) is a computer bus specification used for 8-bit IBM-compatible systems. An ISA bus provides a basic route for peripheral devices that are attached to a motherboard to communicate with different circuits or other devices that are also attached to the same motherboard. Peripheral component interface [&hellip;]<\/p>\n","protected":false},"author":7813,"featured_media":0,"comment_status":"open","ping_status":"closed","template":"","format":"standard","meta":{"_acf_changed":false,"_lmt_disableupdate":"","_lmt_disable":"","om_disable_all_campaigns":false,"footnotes":""},"definitioncat":[217],"class_list":["post-4387","definition","type-definition","status-publish","format-standard","hentry","definitioncat-hardware"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v24.2 (Yoast SEO v24.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>What is Industry Standard Architecture (ISA)? - Definition from Techopedia<\/title>\n<meta name=\"description\" content=\"This definition explains the meaning of Industry Standard Architecture and why it matters.\" \/>\n<meta name=\"robots\" content=\"noindex, follow\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Industry Standard Architecture\" \/>\n<meta property=\"og:description\" content=\"This definition explains the meaning of Industry Standard Architecture and why it matters.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.techopedia.com\/definition\/5298\/industry-standard-architecture-isa\" \/>\n<meta property=\"og:site_name\" content=\"Techopedia\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/techopedia\/\" \/>\n<meta property=\"article:modified_time\" content=\"2017-06-20T11:52:32+00:00\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:site\" content=\"@techopedia\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.techopedia.com\/definition\/5298\/industry-standard-architecture-isa#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.techopedia.com\/definition\/5298\/industry-standard-architecture-isa\"},\"author\":{\"name\":\"Margaret Rouse\",\"@id\":\"https:\/\/www.techopedia.com\/#\/schema\/person\/f5dd538e31ee352d105b8af36c4268a5\"},\"headline\":\"Industry Standard Architecture\",\"datePublished\":\"2011-09-08T17:04:19+00:00\",\"dateModified\":\"2017-06-20T11:52:32+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.techopedia.com\/definition\/5298\/industry-standard-architecture-isa\"},\"wordCount\":189,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/www.techopedia.com\/#organization\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/www.techopedia.com\/definition\/5298\/industry-standard-architecture-isa#respond\"]}],\"articleSection\":\"\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.techopedia.com\/definition\/5298\/industry-standard-architecture-isa\",\"url\":\"https:\/\/www.techopedia.com\/definition\/5298\/industry-standard-architecture-isa\",\"name\":\"What is Industry Standard Architecture (ISA)? 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