{"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\/pl\/blog\/news\/linux-zapushhen-na-igrovoj-pristavke-atari-jaguar","title":{"rendered":"Linux uruchomiony na konsoli do gier Atari Jaguar","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Po przeniesieniu systemu Linux na Sega MegaDrive wprowadzono mo\u017cliwo\u015b\u0107 uruchamiania j\u0105dra Linux z zestawem narz\u0119dzi Busybox na konsoli do gier Atari Jaguar, wydanej w 1993 roku. Konsola by\u0142a wyposa\u017cona w procesor CPU Motorola 68000, 2 MB pami\u0119ci RAM i mog\u0142a wykorzystywa\u0107 kartrid\u017ce jako sta\u0142e no\u015bniki o pojemno\u015bci do 6 MB. Urz\u0105dzenie mia\u0142o dwa koprocesory: Tom (GPU z 32-bitow\u0105 architektur\u0105 RISC + 64-bitowy procesor do przetwarzania wideo + 64-bitowy procesor do realizacji operacji logicznych) oraz Jerry (DSP z 32-bitow\u0105 architektur\u0105 RISC do obs\u0142ugi d\u017awi\u0119ku). <\/p>\n

Podobnie jak port dla Sega MegaDrive do wykonywania j\u0105dra Linux na CPU Motorola 68000, kt\u00f3ry nie ma sprz\u0119towego modu\u0142u zarz\u0105dzania pami\u0119ci\u0105 (MMU), standardowe j\u0105dro 7.2.0-rc1 zosta\u0142o zbudowane w trybie u\u017cywanym dla mikrokontroler\u00f3w «NOMMU», co pozwala na wykorzystanie p\u0142askiego modelu pami\u0119ci z liniowym adresem przestrzeni (wcze\u015bniejsze prace nad dzia\u0142aniem bez MMU by\u0142y rozwijane w forku j\u0105dra uClinux, ale p\u00f3\u017aniej zosta\u0142y przyj\u0119te do g\u0142\u00f3wnej wersji j\u0105dra w formie opcji «NOMMU»). Problem z brakiem pami\u0119ci operacyjnej zosta\u0142 rozwi\u0105zany inaczej, dzi\u0119ki wykorzystaniu mechanizmu execute-in-place (XIP), kt\u00f3ry umo\u017cliwia bezpo\u015brednie wykonywanie kodu j\u0105dra z ROM-u bez kopiowania do pami\u0119ci operacyjnej. <\/p>\n

Pami\u0119\u0107 RAM w urz\u0105dzeniu jest odzwierciedlona pod adresem 0x000000, a ROM (kartrid\u017c) — pod adresem 0x80000, w zwi\u0105zku z czym komponenty j\u0105dra Linux zosta\u0142y podzielone na dwie oddzielne przestrzenie pami\u0119ci: sekcje .rodata i .text z konstantami i kodem umieszczono na kartrid\u017cu, a sekcje .data i .bss z danymi zmiennymi w pami\u0119ci operacyjnej. Poniewa\u017c CPU 68000 szuka tabeli wektor\u00f3w przerwa\u0144 pod adresem 0x0, a j\u0105dro faktycznie znajduje si\u0119 na kartrid\u017cu, kt\u00f3rego zawarto\u015b\u0107 jest odzwierciedlona pod adresem 0x80000, zastosowano dodatkowo hack polegaj\u0105cy na skopiowaniu wektor\u00f3w przerwa\u0144 do pami\u0119ci RAM. <\/p>\n

Problem z brakiem zegara w CPU Motorola 68000 zosta\u0142 rozwi\u0105zany poprzez wykorzystanie zegar\u00f3w u\u017cywanych w DSP do syntezowania d\u017awi\u0119ku. Te zegary zosta\u0142y u\u017cyte do generowania przerwa\u0144, kt\u00f3re aktywowa\u0142y planista zada\u0144. Aby wy\u015bwietla\u0107 komunikaty j\u0105dra podczas \u0142adowania, napisano oddzielny sterownik konsoli, kt\u00f3ry wykonywa\u0142 wyj\u015bcie z symulacj\u0105 portu szeregowego poprzez piny TXD i RXD, sterowane przez procesor DSP. <\/p>\n

Do kompilacji komponent\u00f3w przestrzeni u\u017cytkownika wykorzystano zestaw narz\u0119dzi Buildroot z \u0142atkami projektu LinuxMD. Aby zaoszcz\u0119dzi\u0107 pami\u0119\u0107, podczas inicjalizacji bezpo\u015brednio wywo\u0142ywano pow\u0142ok\u0119 «\/bin\/busybox sh», funkcja malloc w bibliotece uClibc zosta\u0142a zast\u0105piona uproszczon\u0105 wersj\u0105 malloc-simple, kt\u00f3ra nie zachowuje dodatkowych metadanych, a zamiast pe\u0142noprawnego bootloadera, takiego jak U-Boot, dokonano bezpo\u015bredniego przekazania kontroli do j\u0105dra za pomoc\u0105 polecenia «jmp $80000».

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\u0179r\u00f3d\u0142o: 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\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 uruchomiony na konsoli do gier Atari Jaguar | ProHoster","description":"Po przeniesieniu Linuksa na Sega MegaDrive umo\u017cliwiono uruchomienie j\u0105dra Linuksa z zestawem narz\u0119dzi Busybox na konsoli do gier Atari Jaguar, wydanej w 1993 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