{"id":182545,"date":"2026-07-08T22:53:25","date_gmt":"2026-07-08T20:53:26","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/linux-zapushhen-na-igrovoj-pristavke-atari-jaguar"},"modified":"2026-07-08T22:53:25","modified_gmt":"2026-07-08T20:53:26","slug":"linux-zapushhen-na-igrovoj-pristavke-atari-jaguar","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sv\/blog\/news\/linux-zapushhen-na-igrovoj-pristavke-atari-jaguar","title":{"rendered":"Linux har startats p\u00e5 spelkonsolen Atari Jaguar","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Efter porteringen av Linux till Sega MegaDrive inf\u00f6rdes m\u00f6jligheten att k\u00f6ra Linux-k\u00e4rnan med ett set av Busybox-verktyg p\u00e5 spelkonsolen Atari Jaguar, som sl\u00e4pptes 1993. Konsolen var utrustad med en CPU fr\u00e5n Motorola 68000, levererades med 2 MB RAM och kunde anv\u00e4nda cartridger med en kapacitet p\u00e5 upp till 6 MB som permanent lagring. Enheten var f\u00f6rsedd med tv\u00e5 koprocessorer: Tom (GPU med 32-bitars RISC-arkitektur + 64-bitars videoprocessor + 64-bitars processor f\u00f6r logiska operationer) och Jerry (DSP med 32-bitars RISC-arkitektur f\u00f6r ljudbehandling). <\/p>\n

I likhet med porten f\u00f6r Sega MegaDrive f\u00f6r att k\u00f6ra Linux-k\u00e4rnan p\u00e5 en Motorola 68000 CPU, som saknar en h\u00e5rdvarumodul f\u00f6r minneshantering (MMU), byggdes standardk\u00e4rnan 7.2.0-rc1 i det s\u00e5 kallade NOMMU-l\u00e4get, vilket m\u00f6jligg\u00f6r anv\u00e4ndning av en platt minnesmodell med ett linj\u00e4rt adresseringsutrymme (tidigare utvecklades l\u00f6sningar f\u00f6r att fungera utan MMU i en fork av uClinux-k\u00e4rnan, men dessa har sedan antagits i den officiella k\u00e4rnan i form av en NOMMU-option). Problemet med otillr\u00e4ckligt RAM l\u00f6stes p\u00e5 annat s\u00e4tt genom att anv\u00e4nda mekanismen execute-in-place (XIP), som m\u00f6jligg\u00f6r direkt k\u00f6rning av k\u00e4rnkod fr\u00e5n ROM utan att kopiera den till RAM. <\/p>\n

RAM p\u00e5 enheten avspeglas vid adress 0x000000, medan ROM (kartridgen) avspeglas vid adress 0x80000. D\u00e4rmed delades komponenterna av Linux-k\u00e4rnan upp i tv\u00e5 separata minnesomr\u00e5den: sektionerna .rodata och .text med konstanter och kod placerades p\u00e5 kartridgen, medan sektionerna .data och .bss med f\u00f6r\u00e4nderliga data f\u00f6rvarades i RAM. Eftersom CPU 68000 s\u00f6ker efter avbrottsrutinen i vektortabellen vid adress 0x0, och k\u00e4rnan faktiskt placeras p\u00e5 kartridgen vars inneh\u00e5ll avspeglas vid adress 0x80000, till\u00e4mpades dessutom en hack med att kopiera avbrottsvektorerna till RAM. <\/p>\n

Problemet med den saknade timern i CPU:n Motorola 68000 l\u00f6stes genom att anv\u00e4nda timrarna som anv\u00e4nds i DSP:n f\u00f6r ljudsyntes. Dessa timrar anv\u00e4ndes f\u00f6r att generera avbrott f\u00f6r att aktivera schemal\u00e4ggaren. F\u00f6r att skriva ut meddelanden fr\u00e5n k\u00e4rnan under uppstarten skapades en separat konsoldrivrutin som g\u00f6r utskrifter med simulering av en seriell port via pinnarna TXD och RXD, styrda av DSP-processorn. <\/p>\n

F\u00f6r att bygga anv\u00e4ndarutrymmets komponenter anv\u00e4ndes Buildroot-verktyg med patchar fr\u00e5n LinuxMD-projektet. F\u00f6r att spara minne kallades kommandot direkt vid initiering till skalet \"\/bin\/busybox sh\", funktionen malloc i uClibc-biblioteket ersattes med en f\u00f6renklad variant malloc-simple, som inte sparar ytterligare metadata, och ist\u00e4llet f\u00f6r en fullst\u00e4ndig bootloader, s\u00e5som U-Boot, anv\u00e4ndes en direkt \u00f6verf\u00f6ring av kontrollen till k\u00e4rnan med kommandot \"jmp $80000\".

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K\u00e4lla: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0421\u043b\u0435\u0434\u043e\u043c \u0437\u0430 \u043f\u043e\u0440\u0442\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u0435\u043c Linux \u043d\u0430 Sega MegaDrive \u0440\u0435\u0430\u043b\u0438\u0437\u043e\u0432\u0430\u043d\u0430 \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u044c \u0437\u0430\u043f\u0443\u0441\u043a\u0430 \u044f\u0434\u0440\u0430 Linux \u0441 \u043d\u0430\u0431\u043e\u0440\u043e\u043c \u0443\u0442\u0438\u043b\u0438\u0442 Busybox \u043d\u0430 \u0438\u0433\u0440\u043e\u0432\u043e\u0439 \u043a\u043e\u043d\u0441\u043e\u043b\u0438 Atari Jaguar, \u0432\u044b\u043f\u0443\u0449\u0435\u043d\u043d\u043e\u0439 \u0432 1993 \u0433\u043e\u0434\u0443. \u041f\u0440\u0438\u0441\u0442\u0430\u0432\u043a\u0430 \u043a\u043e\u043c\u043f\u043b\u0435\u043a\u0442\u043e\u0432\u0430\u043b\u0430\u0441\u044c CPU Motorola 68000, \u043f\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u043b\u0430\u0441\u044c \u0441 2 \u041c\u0411 \u041e\u0417\u0423 \u0438 \u0432 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[…]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":10,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-182545","post","type-post","status-publish","format-standard","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\n","aioseo_head_json":{"title":"\ud83e\udd47Linux har k\u00f6rts p\u00e5 spelkonsolen Atari Jaguar | ProHoster","description":"Efter porteringen av Linux till Sega MegaDrive har det blivit m\u00f6jligt att k\u00f6ra Linux-k\u00e4rnan med Busybox-verktyg p\u00e5 spelkonsolen Atari Jaguar, som sl\u00e4pptes 1993.","canonical_url":"https:\/\/prohoster.info\/sv\/blog\/news\/linux-zapushhen-na-igrovoj-pristavke-atari-jaguar","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"sv_SE","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\udd47Linux \u0437\u0430\u043f\u0443\u0449\u0435\u043d \u043d\u0430 \u0438\u0433\u0440\u043e\u0432\u043e\u0439 \u043f\u0440\u0438\u0441\u0442\u0430\u0432\u043a\u0435 Atari Jaguar | ProHoster","og:description":"\u0421\u043b\u0435\u0434\u043e\u043c \u0437\u0430 \u043f\u043e\u0440\u0442\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u0435\u043c Linux \u043d\u0430 Sega MegaDrive 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