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Re: eCos support JVM?


Sir,

Thanks for your reply.
1.    Is it means if i need to implement Java in eCos, then most probably i
need to port from Wonka VM?
2.    Is there any source available now?
3.    Also if I'm using uCLinux to implement, then it will be much more
easier?
4.    Do you think it will be a problem for a MMU less processor to run
Java, meaning the speed may be too low?
5.    Is there any other Linux that may able to run Java with MMU less
processor?

Please advise.

Thanks and Regards,
Amy Yap

----- Original Message -----
From: "Chris Gray" <chris.gray@kiffer.be>
To: "Amy Yap Hai Sin" <hsyap@mtl-micomtech.com.sg>;
<ecos-discuss@sources.redhat.com>
Sent: Sunday, July 11, 2004 4:53 PM
Subject: Re: [ECOS] eCos support JVM?


> On Sunday 11 July 2004 08:23, Amy Yap Hai Sin wrote:
> > Hello,
> >
> > May I know whether eCos suitable for the application that required JVM
> > implementation? I will be using ARM7-eCos system to implement my
> > application using Java to run on top of it. Please advise.
>
> Amy,
>
> A couple of students once ported the Wonka VM to eCos - veteran list
members
> may remember Tom and Stijn from Belgium. They were even able to get the
AWT
> running on an iPAQ, but OTOH they chickened out on the networking side
(eCos
> network code was in a state of flux back then). They had an ext2
filesystem
> built into the executable. 8-(8->)
>
> This port was never maintained, and quite a bit of work would be needed to
get
> it working again. As you know, my company markets a VM based on Wonka
which
> already runs on ARM7-uClinux; porting this to eCos is something which we
are
> interested in doing (it's even mentioned on our web site), but up to now
> there was no lead customer to give some priority to this task.
>
> Our product supports J2ME CDC(*), so it is a bit bigger then CLDC
solutions of
> the kind currently being built into mobile 'phones; expect to need 2MB or
ROM
> and at least 4MB RAM (preferably 6MB or even 8MB). That places you at the
> upper end of what is usually considered to be the eCos domain: OTOH it
means
> that with our VM + eCos you have a chance of achieving something in 8MB,
> whereas on the same device running Linux you would have insufficient free
RAM
> to do anything much.
>
> Best wishes,
>
> Chris
>
> (*) ObDisclaimer: we are not Sun licencees, so we cannot legally use the
> abbreviations J2ME(TM) or CDC(TM) to describe our product. This is just to
> give you an idea of the API coverage we are aiming at.
>
> --
> Chris Gray                      /k/ Embedded Java Solutions
> Embedded & Mobile Java, OSGi        http://www.kiffer.be/k/
> chris.gray@kiffer.be                         +32 3 216 0369


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