jslinux  Linux emulator by Javascript                Hiro Yoshioka    YLUG – Yokohama Linux Users Group                 @h...
   http://bellard.org/jslinux/   What is it?   Linux Emulator   It is written in Javascript   Developed by Fabrice Be...
Javascript PC Emulator   This PC emulator is written in Javascript.   32 bit x86 compatible CPU   8259 Programmble Inte...
CPU Emulation   QEMU (developed by Fabrice Bellard)   Some restrictions       No FPU/MMX/SSE       No segment limit an...
Device   No synchronization between PIT and the real    time   Clipboard device /dev/clipboard – exchange of    data bet...
Linux Distribution   2.6.20 linux kernel   Buildroot   Busybox   Tinycc   qemacs
Javascript   V8 is slower than Jaeger Monkey
Whats the use?   Benchmarking   Learning to use command line Unix
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Jslinux

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Jslinux

  1. 1. jslinux Linux emulator by Javascript Hiro Yoshioka YLUG – Yokohama Linux Users Group @hyoshiok hyoshiok at gmail.com http://d.hatena.ne.jp/hyoshiok
  2. 2.  http://bellard.org/jslinux/ What is it? Linux Emulator It is written in Javascript Developed by Fabrice Bellard  QEMU  2700 billion decimal digits of Pi  FFMPEG  TCC, QEmacs, and more
  3. 3. Javascript PC Emulator This PC emulator is written in Javascript. 32 bit x86 compatible CPU 8259 Programmble Interrupt Controller 8254 Programmble Interrupt Timeer 16450 UART Real Time Clock
  4. 4. CPU Emulation QEMU (developed by Fabrice Bellard) Some restrictions  No FPU/MMX/SSE  No segment limit and right checks when accessing memory.  No CS/DS/ES/SS segment overrides.  missing instruction (BCD operations, BOUND, …)  No single stepping  No real mode  No 16 bit protected mode
  5. 5. Device No synchronization between PIT and the real time Clipboard device /dev/clipboard – exchange of data between the emulator andf out side world.
  6. 6. Linux Distribution 2.6.20 linux kernel Buildroot Busybox Tinycc qemacs
  7. 7. Javascript V8 is slower than Jaeger Monkey
  8. 8. Whats the use? Benchmarking Learning to use command line Unix

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