Porting to i686-msdosdjgpp

[Thomas Stüfe]

On Fri, Nov 19, 2021 at 12:25 PM Magnus Ihse Bursie <
magnus.ihse.bursie at oracle.com> wrote:

> On 2021-11-17 14:27, Thomas Stüfe wrote:
>
>
>
> 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.
>
> Yes, it's a shame. I felt sorry for the source code, just lying rotting
> there as a SVN dump on archive.org, so I installed subversion, made a few
> scripts, and converted it to git and put it on Github. [1]
>
> That won't bring active development back, but at least the source code is
> accessible for archaeological reasons. And maybe it'll be enough to get
> someone to bring it back to life...
>
> /Magnus
>
> [1] https://github.com/magicus/phoneME
>
>
This is awesome, Magnus! And with full commit history too.

So many memories :)
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