{"id":181694,"date":"2026-05-24T00:25:20","date_gmt":"2026-05-23T22:25:21","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/vypolneno-dizassemblirovaniya-mikrokoda-i386-i-sozdan-otkrytyj-cpu-z386"},"modified":"2026-05-24T00:25:20","modified_gmt":"2026-05-23T22:25:21","slug":"vypolneno-dizassemblirovaniya-mikrokoda-i386-i-sozdan-otkrytyj-cpu-z386","status":"publish","type":"post","link":"https:\/\/prohoster.info\/da\/blog\/news\/vypolneno-dizassemblirovaniya-mikrokoda-i386-i-sozdan-otkrytyj-cpu-z386","title":{"rendered":"Mikrokoden i386 er blevet disassembleret, og den \u00e5bne CPU z386 er blevet skabt","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Entusiasterne form\u00e5ede at udtr\u00e6kke og disassemblere mikrokoden fra Intel 80386-processoren, som p\u00e5 grund af manglende dokumentation blev anset for at v\u00e6re en \"sort boks\". Den bin\u00e6re mikrokode blev genskabt med hj\u00e6lp fra AI ved at analysere h\u00f8jopl\u00f8sningsfotos af krystallet, og driften blev analyseret gennem sporingen af forbindelserne p\u00e5 krystallet. Gradvis blev strukturen af mikro-kommandoer (\u00b5-ops), felterne, udf\u00f8relsesr\u00e6kkef\u00f8lgen og slutmark\u00f8rer for instruktionerne defineret. Projektets resultater er offentliggjort p\u00e5 GitHub som offentligt dom\u00e6ne.<\/p>\n

\"Mikrokoden<\/center><\/p>\n

Det er blevet identificeret, at i CPU 80386 udf\u00f8res hver instruktion fuldt ud via mikrocode, mens i 8086 og moderne processorer behandles en del instruktioner direkte. Desuden, i mods\u00e6tning til 8086-processorer, implementerer mikrocode i 80386 ikke algoritmer direkte, men konfigurerer hovedsageligt hardwareacceleratorer (multiplikator, divider, hurtig skift, PTU (Protection Test Unit)). <\/p>\n

I l\u00f8bet af unders\u00f8gelsen blev der ogs\u00e5 opdaget et muligt sikkerhedsproblem i behandlingen af adgangsniveauet til input\/output (IO permission bitmap): ved en 4-byte adgang til portene blev adgangsbittene kun kontrolleret for de f\u00f8rste 3 bytes, mens adgangen til den 4. byte ikke blev kontrolleret, hvilket teoretisk tillod adgang til hardwareregistre, der burde have v\u00e6ret blokeret.<\/p>\n

P\u00e5 baggrund af den offentliggjorte mikrocode er der udviklet en \u00e5ben CPU z386, implementeret i SystemVerilog-sprog og k\u00f8rende p\u00e5 FPGA. I stedet for at implementere hver instruktion som et separat RTL (Register-Transfer Level) i z386, er der implementeret hardwarestrukturer, som styres af den originale mikrocode. Ydelsen af den forberedte implementering svarer til en hurtig 386 PC (~70MHz). Under z386 blev det med succes muligt at k\u00f8re DOS 6\/7, DOS\/4GW, DOS\/32A og spil som Doom og Cannon Fodder.
\n
Kilde: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u042d\u043d\u0442\u0443\u0437\u0438\u0430\u0441\u0442\u044b \u0441\u043c\u043e\u0433\u043b\u0438 \u0443\u0441\u043f\u0435\u0448\u043d\u043e \u0438\u0437\u0432\u043b\u0435\u0447\u044c \u0438 \u0434\u0438\u0437\u0430\u0441\u0441\u0435\u043c\u0431\u043b\u0438\u0440\u043e\u0432\u0430\u0442\u044c \u043c\u0438\u043a\u0440\u043e\u043a\u043e\u0434 \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u043e\u0440\u0430 Intel 80386, \u043a\u043e\u0442\u043e\u0440\u044b\u0439 \u0438\u0437-\u0437\u0430 \u043e\u0442\u0441\u0443\u0442\u0441\u0442\u0432\u0438\u044f \u0434\u043e\u043a\u0443\u043c\u0435\u043d\u0442\u0430\u0446\u0438\u0438 \u0441\u0447\u0438\u0442\u0430\u043b\u0441\u044f «\u0447\u0451\u0440\u043d\u044b\u043c \u044f\u0449\u0438\u043a\u043e\u043c». \u0411\u0438\u043d\u0430\u0440\u043d\u044b\u0439 \u043e\u0431\u0440\u0430\u0437 \u043c\u0438\u043a\u0440\u043e\u043a\u043e\u0434\u0430 \u0431\u044b\u043b \u0432\u043e\u0441\u0441\u043e\u0437\u0434\u0430\u043d \u0441 \u043f\u0440\u0438\u0432\u043b\u0435\u0447\u0435\u043d\u0438\u0435\u043c AI \u043f\u043e \u0444\u043e\u0442\u043e\u0433\u0440\u0430\u0444\u0438\u044f\u043c \u043a\u0440\u0438\u0441\u0442\u0430\u043b\u043b\u0430 \u0432 \u0432\u044b\u0441\u043e\u043a\u043e\u043c \u0440\u0430\u0437\u0440\u0435\u0448\u0435\u043d\u0438\u0438, \u0430 \u043b\u043e\u0433\u0438\u043a\u0430 \u0440\u0430\u0431\u043e\u0442\u044b \u0440\u0430\u0437\u043e\u0431\u0440\u0430\u043d\u0430 \u0447\u0435\u0440\u0435\u0437 \u0442\u0440\u0430\u0441\u0441\u0438\u0440\u043e\u0432\u043a\u0443 \u0441\u043e\u0435\u0434\u0438\u043d\u0435\u043d\u0438\u0439 \u043d\u0430 \u043a\u0440\u0438\u0441\u0442\u0430\u043b\u043b\u0435. \u041f\u043e\u0441\u0442\u0435\u043f\u0435\u043d\u043d\u043e \u0431\u044b\u043b\u0438 \u043e\u043f\u0440\u0435\u0434\u0435\u043b\u0435\u043d\u044b \u0441\u0442\u0440\u0443\u043a\u0442\u0443\u0440\u0430 \u043c\u0438\u043a\u0440\u043e\u043a\u043e\u043c\u0430\u043d\u0434 (μ-ops), \u043f\u043e\u043b\u044f, \u043f\u043e\u0440\u044f\u0434\u043e\u043a \u0438\u0441\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044f \u0438 \u043c\u0430\u0440\u043a\u0435\u0440\u044b \u043a\u043e\u043d\u0446\u0430 \u0438\u043d\u0441\u0442\u0440\u0443\u043a\u0446\u0438\u0439. \u041d\u0430\u0440\u0430\u0431\u043e\u0442\u043a\u0438 \u043f\u0440\u043e\u0435\u043a\u0442\u0430 […]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":8,"featured_media":181695,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-181694","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\n","aioseo_head_json":{"title":"\ud83e\udd47Disassembly af i386 mikrocode er udf\u00f8rt, og en \u00e5ben CPU z386 er oprettet | ProHoster","description":"Entusiaster har med succes ekstraheret og disassembleret mikrocode fra Intel 80386-processoren, som p\u00e5 grund af manglende dokumentation blev betragtet som en \"black box.\"","canonical_url":"https:\/\/prohoster.info\/da\/blog\/news\/vypolneno-dizassemblirovaniya-mikrokoda-i386-i-sozdan-otkrytyj-cpu-z386","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"da_DK","og:site_name":"ProHoster | \u041a\u0443\u043f\u0438\u0442\u044c \u043d\u0430\u0434\u0435\u0436\u043d\u044b\u0439 \u0445\u043e\u0441\u0442\u0438\u043d\u0433 \u0434\u043b\u044f \u0441\u0430\u0439\u0442\u043e\u0432 \u0441 \u0437\u0430\u0449\u0438\u0442\u043e\u0439 \u043e\u0442 DDoS, VPS VDS \u0441\u0435\u0440\u0432\u0435\u0440\u044b","og:type":"article","og:title":"\ud83e\udd47\u0412\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u043e \u0434\u0438\u0437\u0430\u0441\u0441\u0435\u043c\u0431\u043b\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f \u043c\u0438\u043a\u0440\u043e\u043a\u043e\u0434\u0430 i386 \u0438 \u0441\u043e\u0437\u0434\u0430\u043d \u043e\u0442\u043a\u0440\u044b\u0442\u044b\u0439 CPU z386 | ProHoster","og:description":"\u042d\u043d\u0442\u0443\u0437\u0438\u0430\u0441\u0442\u044b \u0441\u043c\u043e\u0433\u043b\u0438 \u0443\u0441\u043f\u0435\u0448\u043d\u043e \u0438\u0437\u0432\u043b\u0435\u0447\u044c \u0438 \u0434\u0438\u0437\u0430\u0441\u0441\u0435\u043c\u0431\u043b\u0438\u0440\u043e\u0432\u0430\u0442\u044c \u043c\u0438\u043a\u0440\u043e\u043a\u043e\u0434 \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u043e\u0440\u0430 Intel 80386, \u043a\u043e\u0442\u043e\u0440\u044b\u0439 \u0438\u0437-\u0437\u0430 \u043e\u0442\u0441\u0443\u0442\u0441\u0442\u0432\u0438\u044f \u0434\u043e\u043a\u0443\u043c\u0435\u043d\u0442\u0430\u0446\u0438\u0438 \u0441\u0447\u0438\u0442\u0430\u043b\u0441\u044f "\u0447\u0451\u0440\u043d\u044b\u043c \u044f\u0449\u0438\u043a\u043e\u043c".","og:url":"https:\/\/prohoster.info\/da\/blog\/news\/vypolneno-dizassemblirovaniya-mikrokoda-i386-i-sozdan-otkrytyj-cpu-z386","og:image":"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg","og:image:secure_url":"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg","og:image:width":350,"og:image:height":350,"article:published_time":"2026-05-23T22:25:21+00:00","article:modified_time":"2026-05-23T22:25:21+00:00","article:publisher":"https:\/\/www.facebook.com\/prohoster","article:author":"https:\/\/www.facebook.com\/prohoster"},"aioseo_meta_data":[],"gt_translate_keys":[{"key":"link","format":"url"}],"_links":{"self":[{"href":"https:\/\/prohoster.info\/da\/wp-json\/wp\/v2\/posts\/181694","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/prohoster.info\/da\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/prohoster.info\/da\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/prohoster.info\/da\/wp-json\/wp\/v2\/users\/8"}],"replies":[{"embeddable":true,"href":"https:\/\/prohoster.info\/da\/wp-json\/wp\/v2\/comments?post=181694"}],"version-history":[{"count":0,"href":"https:\/\/prohoster.info\/da\/wp-json\/wp\/v2\/posts\/181694\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/prohoster.info\/da\/wp-json\/wp\/v2\/media\/181695"}],"wp:attachment":[{"href":"https:\/\/prohoster.info\/da\/wp-json\/wp\/v2\/media?parent=181694"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/prohoster.info\/da\/wp-json\/wp\/v2\/categories?post=181694"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/prohoster.info\/da\/wp-json\/wp\/v2\/tags?post=181694"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}