{"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\/hu\/blog\/news\/vypolneno-dizassemblirovaniya-mikrokoda-i386-i-sozdan-otkrytyj-cpu-z386","title":{"rendered":"Befejez\u0151d\u00f6tt az i386 mikrok\u00f3d disassemble-\u00e1l\u00e1sa \u00e9s l\u00e9trej\u00f6tt a ny\u00edlt CPU z386","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

A lelkesed\u0151k sikeresen kivont\u00e1k \u00e9s leszerelt\u00e9k az Intel 80386 processzor mikrok\u00f3dj\u00e1t, amely a dokument\u00e1ci\u00f3 hi\u00e1nya miatt \"fekete doboznak\" sz\u00e1m\u00edtott. A mikrok\u00f3d bin\u00e1ris k\u00e9pe AI seg\u00edts\u00e9g\u00e9vel lett \u00fajb\u00f3l l\u00e9trehozva, a csip magas felbont\u00e1s\u00fa f\u00e9nyk\u00e9pei alapj\u00e1n, \u00e9s a m\u0171k\u00f6d\u00e9s logik\u00e1j\u00e1t a csip \u00f6sszekapcsol\u00e1sainak nyomk\u00f6vet\u00e9s\u00e9vel elemezt\u00e9k. Fokozatosan meghat\u00e1rozt\u00e1k a mikrok\u00e9zikarok (\u03bc-ops) strukt\u00far\u00e1j\u00e1t, mez\u0151it, a v\u00e9grehajt\u00e1si sorrendet \u00e9s az utas\u00edt\u00e1sok v\u00e9gpontjait jelz\u0151 markereket. A projekt el\u0151zm\u00e9nyei nyilv\u00e1nos javak\u00e9nt ker\u00fcltek k\u00f6zz\u00e9t\u00e9telre a GitHub-on.<\/p>\n

\"Befejez\u0151d\u00f6tt<\/center><\/p>\n

Meg\u00e1llap\u00edt\u00e1sra ker\u00fclt, hogy a CPU 80386-ban minden utas\u00edt\u00e1st teljes eg\u00e9sz\u00e9ben a mikrok\u00f3d hajt v\u00e9gre, m\u00edg a 8086 \u00e9s a modern processzorok eset\u00e9ben az utas\u00edt\u00e1sok egy r\u00e9sze k\u00f6zvetlen\u00fcl is feldolgoz\u00e1sra ker\u00fcl. Ezenk\u00edv\u00fcl a 8086-os processzorokkal ellent\u00e9tben az 80386-ban a mikrok\u00f3d nem val\u00f3s\u00edtja meg az algoritmusokat k\u00f6zvetlen\u00fcl, hanem f\u0151k\u00e9nt a hardveres gyors\u00edt\u00f3kat (szorz\u00f3, oszt\u00f3, gyors eltol\u00e1s, PTU (Protection Test Unit)) konfigur\u00e1lja. <\/p>\n

A kutat\u00e1s sor\u00e1n egy lehets\u00e9ges biztons\u00e1gi probl\u00e9m\u00e1t is felfedeztek a bemeneti\/kimeneti jogok bitk\u00e9pe (IO permission bitmap) feldolgoz\u00e1s\u00e1val kapcsolatban: 4-b\u00e1jtos porthozz\u00e1f\u00e9r\u00e9s eset\u00e9n a hozz\u00e1f\u00e9r\u00e9si jogok bitjeit csak az els\u0151 3 b\u00e1jt sz\u00e1m\u00e1ra ellen\u0151rizt\u00e9k, m\u00edg a 4. b\u00e1jt hozz\u00e1f\u00e9r\u00e9s\u00e9t nem ellen\u0151rizt\u00e9k, ami elm\u00e9letileg lehet\u0151v\u00e9 tette volna az olyan hardverregiszterekhez val\u00f3 hozz\u00e1f\u00e9r\u00e9st, amelyekhez hozz\u00e1f\u00e9r\u00e9st pedig meg kellett volna tagadni.<\/p>\n

A k\u00f6zz\u00e9tett mikrok\u00f3d alapj\u00e1n egy ny\u00edlt CPU z386 k\u00e9sz\u00fclt, amelyet a SystemVerilog nyelven val\u00f3s\u00edtottak meg \u00e9s FPGA-n kereszt\u00fcl m\u0171k\u00f6dik. A z386-ban ahelyett, hogy minden utas\u00edt\u00e1st k\u00fcl\u00f6n RTL (Register-transfer level) form\u00e1j\u00e1ban val\u00f3s\u00edtan\u00e1nak meg, hardveres strukt\u00far\u00e1kat alkalmaznak, amelyeket az eredeti mikrok\u00f3d ir\u00e1ny\u00edt. Az elk\u00e9sz\u00edtett megval\u00f3s\u00edt\u00e1s teljes\u00edtm\u00e9nye megfelel egy gyors 386-os PC-nek (~70MHz). A z386 alatt siker\u00fclt sikeresen futtatni a DOS 6\/7-et, DOS\/4GW-t, DOS\/32A-t, \u00e9s j\u00e1t\u00e9kokat, mint a Doom \u00e9s a Cannon Fodder.
\n
Forr\u00e1s: 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 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\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\udd47Mikrok\u00f3d i386 diszassemblerel\u00e9se teljes\u00edtve \u00e9s ny\u00edlt CPU z386 l\u00e9trehozva | ProHoster","description":"A lelkes fejleszt\u0151k sikeresen kinyert\u00e9k \u00e9s diszassemblerelt\u00e9k az Intel 80386 processzor mikrok\u00f3dj\u00e1t, amelyet a dokument\u00e1ci\u00f3 hi\u00e1nya miatt \"fekete dobozk\u00e9nt\" tartottak sz\u00e1mon.","canonical_url":"https:\/\/prohoster.info\/hu\/blog\/news\/vypolneno-dizassemblirovaniya-mikrokoda-i386-i-sozdan-otkrytyj-cpu-z386","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"hu_HU","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 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