{"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\/da\/blog\/news\/linux-zapushhen-na-igrovoj-pristavke-atari-jaguar","title":{"rendered":"Linux k\u00f8rer p\u00e5 spilkonsollen Atari Jaguar","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Efter porteringen af Linux til Sega MegaDrive blev det muligt at starte Linux-kernen med et s\u00e6t Busybox-v\u00e6rkt\u00f8jer p\u00e5 spilkonsollen Atari Jaguar, der blev udgivet i 1993. Konsollen var udstyret med en CPU Motorola 68000, leveret med 2 MB RAM, og kunne bruge cartridges med en st\u00f8rrelse p\u00e5 op til 6 MB som permanent lager. Enheden var udstyret med to co-processorer: Tom (GPU med 32-bit RISC-arkitektur + 64-bit videobehandlingsprocessor + 64-bit processor til logiske operationer) og Jerry (DSP med 32-bit RISC-arkitektur til lydbehandling). <\/p>\n

P\u00e5 samme m\u00e5de som porten til Sega MegaDrive for at k\u00f8re Linux-kernen p\u00e5 CPU'en Motorola 68000, som ikke har en hardwarehukommelsesstyringsenhed (MMU), blev den standardkerne 7.2.0-rc1 samlet i den anvendte mikrokontroller-tilstand «NOMMU», som tillader brug af en flad hukommelsesmodel med et line\u00e6rt adresserum (tidligere blev der lavet arbejde uden MMU i en fork af uClinux-kernen, men derefter blev det taget ind i den prim\u00e6re kerne som en valgmulighed «NOMMU»). Problemet med mangel p\u00e5 RAM blev l\u00f8st anderledes ved at benytte mekanismen execute-in-place (XIP), der g\u00f8r det muligt at udf\u00f8re kernekode direkte fra ROM uden at kopiere til RAM. <\/p>\n

RAM'en p\u00e5 enheden er blevet afspejlet p\u00e5 adressen 0x000000, mens ROM'en (cartridge) — er p\u00e5 adressen 0x80000, og dermed blev Linux-kernens komponenter opdelt i to separate hukommelsesomr\u00e5der: sektionerne .rodata og .text med konstanter og kode blev placeret p\u00e5 cartridgen, mens sektionerne .data og .bss med \u00e6ndrede data blev i RAM. Da CPU 68000 s\u00f8ger efter en interrupt-vektortabel p\u00e5 adressen 0x0, og kernen faktisk er placeret p\u00e5 cartridgen, hvis indhold afspejles p\u00e5 adressen 0x80000, blev der desuden anvendt et hack til at kopiere interrupt-vektorerne til RAM. <\/p>\n

Problemet med frav\u00e6ret af en timer i CPU Motorola 68000 blev l\u00f8st ved at bruge timere i DSP'en til lydsyntese. Disse timere blev anvendt til at generere afbrydelser for at aktivere opgaveplanl\u00e6ggeren. For at vise kernelmeddelelser under opstart blev en separat konsoldriver skrevet, som udf\u00f8rte output ved at simulere en parallell port gennem TXD- og RXD-pins, der styres gennem DSP-processoren. <\/p>\n

Til ops\u00e6tningen af brugerpladsens komponenter blev Buildroot-v\u00e6rkt\u00f8jet anvendt med patches fra LinuxMD-projektet. For at spare p\u00e5 hukommelsen blev kommandolinjemaskinen «\\\/bin\\\/busybox sh» direkte kaldt ved initialization, funktionen malloc i uClibc-biblioteket blev erstattet med en forenklet version malloc-simple, som ikke bevarer yderligere metadata, og i stedet for en fuldgyldig bootloader som U-Boot, blev der udf\u00f8rt en direkte overf\u00f8rsel af kontrol til kernen med kommandoen «jmp $80000».

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Kilde: 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 has been launched on the Atari Jaguar game console | ProHoster","description":"Following the porting of Linux to Sega MegaDrive, it became possible to launch the Linux kernel with a set of Busybox utilities on the Atari Jaguar game console, released in 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\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 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