{"id":20821,"date":"2020-06-02T11:20:45","date_gmt":"2020-06-02T15:20:45","guid":{"rendered":"http:\/\/pappp.net\/?guid=bec4c50f101e91660cf71fb1746eb396"},"modified":"2020-06-02T11:20:45","modified_gmt":"2020-06-02T15:20:45","slug":"those-win9x-crashes-on-fast-machines","status":"publish","type":"post","link":"https:\/\/pappp.net\/?p=20821","title":{"rendered":"Those Win9x Crashes on Fast Machines"},"content":{"rendered":"<p class=\"syndicated-attribution\">Source: <a href=\"http:\/\/www.os2museum.com\/wp\/those-win9x-crashes-on-fast-machines\/\">Hacker News<\/a><\/p>\n<div style=\"background-color : #fff7d5;\n\t\t\tborder-width : 1px; padding : 5px; border-style : dashed; border-color : #e7d796;margin-bottom : 1em; color : #9a8c59;\">Article note: That is a really cool bit of forensics.  \r\n\r\nAMD K6-2s did much more sophisticated uop decomposition and scheduling for complicated instructions (specifically LOOP) and worse with handling programmer\/compiler generated simple instruction sequence, while contemporary Intel parts were the opposite; their errata suggested using the simpler instructions like building your loop on JCXZ instead of using LOOP. \r\n\r\nSo code that did limited precision timer comparisons on either end of fixed-length LOOPs failed with a divide by 0 on AMD parts at lower clocks than on Intel parts.<\/div><a href=\"https:\/\/news.ycombinator.com\/item?id=23391949\" rel=\"noopener noreferrer\">Comments<\/a>","protected":false},"excerpt":{"rendered":"<p>Comments<\/p>\n<p> <a href=\"https:\/\/pappp.net\/?p=20821\">Continue reading <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[226],"tags":[],"class_list":["post-20821","post","type-post","status-publish","format-standard","hentry","category-news-2"],"_links":{"self":[{"href":"https:\/\/pappp.net\/index.php?rest_route=\/wp\/v2\/posts\/20821","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pappp.net\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/pappp.net\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/pappp.net\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/pappp.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=20821"}],"version-history":[{"count":0,"href":"https:\/\/pappp.net\/index.php?rest_route=\/wp\/v2\/posts\/20821\/revisions"}],"wp:attachment":[{"href":"https:\/\/pappp.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=20821"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/pappp.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=20821"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/pappp.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=20821"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}