blocks|key|1579490|text|你需要什么？|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1579491|也许Sanos可以在硬件和JVM之间提供一小块代码供您使用？|1579492|http://www.jbox.dk/sanos/|offset|length|1579493|entityMap|0|LINK|mutability|MUTABLE|url^0|0|0|0|P|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|P|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|Q|8|@]|9|@$F|R|G|S|1|T]]|A|$]]|$1|H|3|-4|5|6|7|U|8|@]|9|@]|A|$]]]|I|$J|$5|K|L|M|A|$N|E]]]]

What is it you need?

Perhaps Sanos can give you a small chunk of code between the hardware and the JVM which you can use?

<a href="http://www.jbox.dk/sanos/" rel="nofollow noreferrer">http://www.jbox.dk/sanos/</a>

blocks|key|1364554|text|与SANOS不同，JNode操作系统是一个完整的操作系统，包含许多受支持的设备、文件系统、网络堆栈、图形用户界面堆栈、命令shell和大约50个命令等等。JNode目前在x86+(32位)上运行，并启用了一个处理器，但x86-64和多处理器版本仍在开发中。(JNode是99.99%25的Java。移植到新的架构需要重写汇编器中0.01%25的代码，创建/修改特定于硬件的驱动程序……并为新体系结构编写本机代码编译器。)|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1364555|我们目前有大约7名活跃的开发人员，但我们一直在寻找新人加入团队，特别是了解Java和代码生成、垃圾收集器、驱动程序等的人。|1364556|(无论如何，我们使用的是最新版本的OpenJDK类库:最新版本为1.6u24。)|1364557|entityMap|0|LINK|mutability|MUTABLE|url|http://www.jnode.org/^0|9|5|0|0|0|0^^$0|@$1|2|3|4|5|6|7|P|8|@]|9|@$A|Q|B|R|1|S]]|C|$]]|$1|D|3|E|5|6|7|T|8|@]|9|@]|C|$]]|$1|F|3|G|5|6|7|U|8|@]|9|@]|C|$]]|$1|H|3|-4|5|6|7|V|8|@]|9|@]|C|$]]]|I|$J|$5|K|L|M|C|$N|O]]]]

Unlike SANOS, the <a href="http://www.jnode.org" rel="noreferrer">JNode</a> operating system is a full operating system with many supported devices, file systems, a network stack, a GUI stack, a command shell and 50 or so commands, and much more. JNode currently runs on x86 (32 bit) with one processor enabled, but x86-64 and multi-processor versions are in development. (JNode is 99.99% Java. Porting to a new architecture would entail rewriting the 0.01% of code that is in assembler, creating / modifying hardware specific drivers ... and writing a native code compiler for the new architecture.)

We currently have ~7 active developers, but we are always looking for new people to join the team, especially people who understand Java AND code generation, garbage collectors, drivers and so on.

(And for what it is worth, we use a recent version of the OpenJDK class libraries: 1.6u24 at the last count.)

blocks|key|1364298|text|有一个Sun项目Squawk，它是在硬件上运行的虚拟机，而不是底层操作系统。对于像Sun+SPOT这样的嵌入式设备非常有用，其中Squawk是操作系统。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1364299|Squawk是在GPLv2下授权的。|1364300|entityMap|0|LINK|mutability|MUTABLE|url|https://squawk.dev.java.net/|1|http://research.sun.com/projects/squawk/squawk-sunspot.html^0|8|6|0|15|8|1|0|0^^$0|@$1|2|3|4|5|6|7|P|8|@]|9|@$A|Q|B|R|1|S]|$A|T|B|U|1|V]]|C|$]]|$1|D|3|E|5|6|7|W|8|@]|9|@]|C|$]]|$1|F|3|-4|5|6|7|X|8|@]|9|@]|C|$]]]|G|$H|$5|I|J|K|C|$L|M]]|N|$5|I|J|K|C|$L|O]]]]

There is the Sun project <a href="https://squawk.dev.java.net/" rel="nofollow noreferrer">Squawk</a> which a VM that runs on hardware instead of an underlying OS. Useful for embedded devices like the <a href="http://research.sun.com/projects/squawk/squawk-sunspot.html" rel="nofollow noreferrer">Sun SPOT</a> where Squawk is the OS.

Squawk is licenced under GPLv2.

blocks|key|1364404|text|还有Project+Guest+VM，它是托管在Xen系统管理程序上的JVM。虽然主页上的细节似乎很少，但也有关于这个项目的Google+Tech+Talk。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1364405|entityMap|0|LINK|mutability|MUTABLE|url|http://research.sun.com/projects/dashboard.php?id=185|1|http://www.youtube.com/watch?v=iHIaH12f2Ek^0|2|G|0|1Q|G|1|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@$A|O|B|P|1|Q]|$A|R|B|S|1|T]]|C|$]]|$1|D|3|-4|5|6|7|U|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]|L|$5|G|H|I|C|$J|M]]]]

There's also <a href="http://research.sun.com/projects/dashboard.php?id=185" rel="nofollow noreferrer">Project Guest VM</a>, which is a JVM hosted on Xen hypervisor. While the home page seems to be rather light on details, there's a <a href="http://www.youtube.com/watch?v=iHIaH12f2Ek" rel="nofollow noreferrer">Google Tech Talk</a> about this project as well.

blocks|key|1364474|text|JNode+OS是一个主要用Java语言编写的操作系统。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1364475|entityMap|0|LINK|mutability|MUTABLE|url|http://www.jnode.org/^0|0|8|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

<a href="http://www.jnode.org/" rel="nofollow noreferrer">JNode OS</a> is an operating system written mostly in Java.

blocks|key|1364451|text|只是我看到和听到的一个小片段。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1364452|麻省理工学院在60/70年代开发了一台Lisp机器，这是一台本质上理解Lisp的机器，我认为他们也将其商业化。|1364453|大约在2002年，我就听说有人在开发芯片、FPGA或ASIC上的JVM。|1364454|麻省理工学院/Lisp的故事是真的，我在他们的博物馆里看到过，有没有人知道关于芯片上的JVM的任何真相？|1364455|谢谢，马丁。|1364456|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|M|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|N|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|O|8|@]|9|@]|A|$]]|$1|H|3|I|5|6|7|P|8|@]|9|@]|A|$]]|$1|J|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|K|$]]

Just a small snippet I seen and heard.

MIT in the 60's/70's developed a Lisp machine, this was a machine that intrinsically understood Lisp, I think that they went onto commercialize it also.

I had heard in about 2002 that someone was doing to develop a JVM on a chip a FPGA or ASIC.

The MIT/Lisp story is true, I seen it in their museum, does anyone know if there is any truth about the JVM on a chip?

thanks,
Martin.

blocks|key|1579763|text|我对java是个新手，而且我对电子学有一定的了解。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1579764|JVM是一个在系统上实际运行的虚拟机器。它可以是windows或solares+x86平台。但据我所知，JVM本身就是我们编译的字节码的系统。对于字节码，JVM虚拟化它自己的ALU，Heap，Stack+extra。它甚至有自己的机器和流畅的语言。|1579765|所以，如果我们能够在硬件芯片上实现JVM规范，那么它将不再是JVM，但我将成为独立的java机器，我们可以在上面开发100%25用Java编写的操作系统。|1579766|因此，在这种情况下，JVM将不是一个操作系统，而是一个直接理解java字节码的系统。|1579767|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|J|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|K|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|L|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|M|8|@]|9|@]|A|$]]|$1|H|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|I|$]]

I am very new to java and and i have some knowledge of electronics.

JVM is a virtual macjine which actually run over a system. It may be windows or solares x86 platform.
But as far as i know JVM itself act as a system for the Bytecode that we compile. For a byte code JVM virtualise its own ALU, Heap, Stack extra. It even have its own machine and assmbly language.

So some how if we able to realize a JVM specification on a Hardware chip then it will not be JVM anymore but i will become standalone Java Machine over which we can develop a operating system 100% written in java. 

So in this case JVM will not be an OS but a System which directly understand java bytecode.

I know that BEA was working on LiquidVM which didn't require an underlying operating system, but would like to know if anyone in the open source community is working on something similar.

Ideally I would like to find an implementation where the VM is directly loaded by the OS boot loader.

Java VMs that do not require an operating system?

文件系统

虚拟化

虚拟机

编译器

Java

FPGA

ASIC

我知道BEA正在开发LiquidVM，它不需要底层操作系统，但我想知道开源社区中是否有人在开发类似的东西。理想情况下，我希望找到一种由操作系统引导加载程序直接加载VM的实现。

问不需要操作系统的Java虚拟机？
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