Porting to i686-msdosdjgpp

[Thomas Stüfe]

On Wed, Nov 17, 2021 at 1:57 PM Magnus Ihse Bursie <
magnus.ihse.bursie at oracle.com> wrote:

>
>
> On 2021-11-16 07:19, Thomas Stüfe wrote:
>
>
>
> On Mon, Nov 15, 2021 at 11:09 PM David Holmes <david.holmes at oracle.com>
> wrote:
>
>> On 16/11/2021 12:06 am, gnufan42 wrote:
>> > David Holmes wrote:
>> >> I'd say it is technically impossible to port OpenJDK to DOS as you do
>> >> not have any of the necessary operating system support for threads,
>> >> synchronization, virtual memory, ....
>> >
>> >       Well, these difficulties are all overcame by the DJGPP project.
>> They use DPMI to let the code runs in 32-bit protected mode, they
>> implemented a lot of POSIX functions, including pthread. Otherwise I won't
>> be trying.
>>
>> I'd never heard of DJGPP but the pthread support still seems limited -
>> hard to find an accurate current description of what is actually
>> supported. So I would not say these difficulties are overcome :) This
>> will be an exceedingly complex and challenging project.
>>
>> Cheers,
>> David
>>
>
> I still think that the CVM (JavaME) may be better suited for the task.
> From the time I worked with it I remember that it was targeted to
> low-memory devices, its C code base was extremely portable, it was very
> configurable (important for embedded) etc. We ran it with green threading
> (like Loom today) and that worked. OpenJDK OTOH relies on native posix
> threads, and there is no easy way around that.
>
> I seemed to remember that Sun open-sourced JavaME in 2006. But I could not
> find the project page.
>
> https://en.wikipedia.org/wiki/Java_Platform,_Micro_Edition
> https://en.wikipedia.org/wiki/PhoneME
>
> PhoneME website seems defunct now. Does anyone know what happened with
> that project?
>
> Wikipedia has links to archive.org.
> https://archive.org/details/phoneme-svn.dump for the source code.
>
> /Magnus
>
>
>
Ah, I missed that. But seems this project is not actively maintained
anymore. Pity.


>
> Cheers, Thomas
>
>
>>
>> > Thanks,
>> > Gnufan
>> >
>>
>
>
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