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Jslinux
This document describes jslinux, a Linux emulator written in Javascript. It summarizes that jslinux uses QEMU for CPU emulation and includes emulations for the 8259 PIC, 8254 PIT, and 16450 UART. However, there are some restrictions in the CPU emulation like no FPU/MMX/SSE support or real mode. It runs a 2.6.20 Linux kernel and includes tools like Buildroot, Busybox, Tinycc, and qemacs. The emulator is slower in V8 compared to other Javascript engines. Jslinux can be used for benchmarking and learning Unix command line skills.
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Jslinux
- 1. jslinux Linuxemulator by Javascript Hiro Yoshioka YLUG – Yokohama Linux Users Group @hyoshiok hyoshiok at gmail.com http://d.hatena.ne.jp/hyoshiok
- 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. 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. 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. Device No synchronization between PIT and the real time Clipboard device /dev/clipboard – exchange of data between the emulator andf out side world.
- 6. Linux Distribution 2.6.20 linux kernel Buildroot Busybox Tinycc qemacs
- 7. Javascript V8 is slower than Jaeger Monkey
- 8. What's the use? Benchmarking Learning to use command line Unix