{"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\/pt\/blog\/news\/linux-zapushhen-na-igrovoj-pristavke-atari-jaguar","title":{"rendered":"Linux foi iniciado no console de jogos Atari Jaguar","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Ap\u00f3s a porta\u00e7\u00e3o do Linux para a Sega MegaDrive, foi implementada a possibilidade de executar o n\u00facleo do Linux com um conjunto de utilit\u00e1rios Busybox no console de jogos Atari Jaguar, lan\u00e7ado em 1993. O console era equipado com um CPU Motorola 68000, tinha 2 MB de RAM e podia utilizar cartuchos com capacidade de at\u00e9 6 MB como armazenamento permanente. O dispositivo contava com dois coprocessadores: Tom (GPU com arquitetura RISC de 32 bits + processador de v\u00eddeo de 64 bits + processador de 64 bits para execu\u00e7\u00e3o de opera\u00e7\u00f5es l\u00f3gicas) e Jerry (DSP com arquitetura RISC de 32 bits para trabalho com \u00e1udio). <\/p>\n

De maneira semelhante ao porto para Sega MegaDrive para a execu\u00e7\u00e3o do n\u00facleo Linux no CPU Motorola 68000, que n\u00e3o possui um m\u00f3dulo de controle de mem\u00f3ria (MMU), o n\u00facleo padr\u00e3o 7.2.0-rc1 foi constru\u00eddo no modo «NOMMU», permitindo o uso de um modelo de mem\u00f3ria plana com espa\u00e7o de endere\u00e7amento linear (anteriormente, as implementa\u00e7\u00f5es para operar sem MMU foram desenvolvidas em um fork do n\u00facleo uClinux, mas depois foram aceitas na vers\u00e3o principal do n\u00facleo na forma da op\u00e7\u00e3o «NOMMU»). O problema da falta de mem\u00f3ria RAM foi resolvido de outra forma, atrav\u00e9s da ativa\u00e7\u00e3o do mecanismo execute-in-place (XIP), permitindo executar diretamente o c\u00f3digo do n\u00facleo da ROM sem c\u00f3pia para a mem\u00f3ria RAM. <\/p>\n

A RAM no dispositivo est\u00e1 refletida no endere\u00e7o 0x000000, enquanto a ROM (cartucho) — no endere\u00e7o 0x80000, respectivamente, os componentes do n\u00facleo Linux foram divididos em duas \u00e1reas de mem\u00f3ria separadas: as se\u00e7\u00f5es .rodata e .text com constantes e c\u00f3digo foram colocadas no cartucho, e as se\u00e7\u00f5es .data e .bss com dados mut\u00e1veis na mem\u00f3ria RAM. Como o CPU 68000 procura a tabela de vetores de interrup\u00e7\u00e3o no endere\u00e7o 0x0, e o n\u00facleo \u00e9 efetivamente alocado no cartucho, cujo conte\u00fado \u00e9 refletido no endere\u00e7o 0x80000, uma hack adicional foi aplicada com a c\u00f3pia dos vetores de interrup\u00e7\u00e3o para a RAM. <\/p>\n

O problema da aus\u00eancia de um timer no CPU Motorola 68000 foi resolvido atrav\u00e9s da utiliza\u00e7\u00e3o de timers usados no DSP para s\u00edntese de \u00e1udio. Esses timers foram aplicados para gerar interrup\u00e7\u00f5es para ativar o escalonador de tarefas. Para a sa\u00edda de mensagens do n\u00facleo durante a inicializa\u00e7\u00e3o, um driver de console separado foi escrito, que realizava a sa\u00edda simulando uma porta paralela atrav\u00e9s dos pinos TXD e RXD, controlados pelo processador DSP. <\/p>\n

Para construir os componentes do espa\u00e7o do usu\u00e1rio, foi utilizada a ferramenta Buildroot com patches do projeto LinuxMD. Para economizar mem\u00f3ria durante a inicializa\u00e7\u00e3o, o shell foi chamado diretamente como «\\\/bin\\\/busybox sh», a fun\u00e7\u00e3o malloc na biblioteca uClibc foi substitu\u00edda por uma vers\u00e3o simplificada malloc-simple, que n\u00e3o salva metadados adicionais, e em vez de um carregador completo, como o U-Boot, foi realizada uma transmiss\u00e3o direta de controle para o n\u00facleo com o comando «jmp $80000».

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\n
Fonte: 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 \u043a\u0430\u0447\u0435\u0441\u0442\u0432\u0435 \u043f\u043e\u0441\u0442\u043e\u044f\u043d\u043d\u043e\u0433\u043e \u0445\u0440\u0430\u043d\u0438\u043b\u0438\u0449\u0430 \u043c\u043e\u0433\u043b\u0430 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c \u043a\u0430\u0440\u0442\u0440\u0438\u0434\u0436\u0438, \u043e\u0431\u044a\u0451\u043c\u043e\u043c \u0434\u043e 6 \u041c\u0411. \u0423\u0441\u0442\u0440\u043e\u0439\u0441\u0442\u0432\u043e \u0431\u044b\u043b\u043e \u043e\u0441\u043d\u0430\u0449\u0435\u043d\u043e \u0434\u0432\u0443\u043c\u044f \u0441\u043e\u043f\u0440\u043e\u0446\u0435\u0441\u0441\u043e\u0440\u0430\u043c\u0438: Tom (GPU c […]<\/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 executado no console de jogos Atari Jaguar | ProHoster","description":"Ap\u00f3s a portabilidade do Linux para o Sega MegaDrive, foi implementada a capacidade de executar o n\u00facleo Linux com um conjunto de utilit\u00e1rios Busybox no console de jogos Atari Jaguar, lan\u00e7ado em 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