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J2ME on C64 - what did you think?
Yes, I like this project 40%  40%  [ 2 ]
Little hope but go ahead 60%  60%  [ 3 ]
It useless, forget it 0%  0%  [ 0 ]
Total votes : 5
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PostPosted: Fri Nov 25, 2005 1:19 pm 
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Joined: Fri Nov 25, 2005 12:50 pm
Posts: 3
I'm going to write Java Virtual Machine for Commodore 64.
Probably it could take 6 months-1 year.
It will allow to run simply J2ME MIDlets on C64.

Here is some technology requirements:

160-512kb total memory (-)
128kb for standart libraries (-)
(40-80kb for JavaMachine) (+/-)
32kb RAM (+)
8kb User-data storage (+)
16 or 32-bit processor (-)
connectivity via HTTP (-/+)
Screen size 96x54, 1-bit color depth (++)

I can use at least 48kb of C64 memory + 12kb of 1541.
Also, I will use floppy-disk as storage of unpacked data and swap-file.
In assembler, I'll reuse code as much as possible.
Also, I'm gathering info on undocumented opcodes.


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PostPosted: Tue Jul 31, 2007 12:37 am 
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Joined: Tue Jul 31, 2007 12:34 am
Posts: 1
You must be finished by now, do you have a download we can see?


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PostPosted: Mon Oct 20, 2008 10:07 am 
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Joined: Fri Nov 25, 2005 12:50 pm
Posts: 3
Sorry, no download link.

Project was never completed, however prototype was able to run simple Hello World and primitive B&W drawings.
However memory limitations was weird - for J2ME extensive use of ZIP

Now I meet similar limitations playing with Lego Mindstorms NXT


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