A new PSP emulator: Jpcsp

[Chrono Archangel]

The famous shadow from PSXC2 along with 'mad' have started working on a PSP emulator in Java! There is not much info and no releases yet, but you should definitly keep an eye on this project.

Looks like the PSP emulation scene is really kicking off. Can't wait to see more progress!

» Check out Jpcsp's project page!

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[Exophase]

No offense to Shadow but it'd be nice if he started promoting the emulator after he had more to show than an ELF loader (hey, doesn't PCSX2 already have an ELF loader?)

[Spacy]

A PSP-Emu in JAVA o.O

Ain't that cursed to be slow or did I miss something about Java ???

[makotech222]

yeah when i saw java i was like.. wtfrunescape? but then again, i dont know much about programming.

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[madprofessor]

shadow didn't promote anything. nobody promoted anything. shadow just mentioned that he is working on this new project as a reply to another emu for psp. that's all there is to it.

you should have noticed that emu schene is a bit slow the last months maybe year and little things like this are worth to be mentioned don't you think?

[Shin_Gouki]

Originally Posted by Spacy

A PSP-Emu in JAVA o.O

Ain't that cursed to be slow or did I miss something about Java ???

Java and slow, my young apprentice, there u get soemthing wrong
using JOGL und "Performance" optimized Java Code you can create amazing things.

things like Jake2 or stellarium4 java prove that.

Its just a shame that most "Emu"Devs are still stuck in the C/C++ mud
I guess its because those help you understanding concepts like Compiler or Interpreter.

Sometimes, some interesting stuff:
http://www.codecommit.com/blog/
man this dude is a freak look what he does with Bencode

like:
http://www.codecommit.com/blog/scala...ssing-in-scala

So thats the cool thing, if you are using the JVM you "could" just use Scala also for coding certain parts of your emu

But from an API Point of View you have damn nice OPtions with Java. Another thing you need for Emulation is timing accuracy , i'm not absolute sure but i think i remember that there was an JSR for that ( so properbly standard in Java7) or maybe there is already an solution. Too bad graham sanderson never released his JPSX :/

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Last edited by Shin_Gouki; July 18th, 2008 at 23:25..

[shadowpcsx2]

Our first consideration is to use JOGL for rendering.
As for other things that might slow emu there is always JNI (Java native interface ) which can connect java with c,c++ or asm code. So yes it is possible

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[dreampeppers99]

Originally Posted by shadowpcsx2

Our first consideration is to use JOGL for rendering.
As for other things that might slow emu there is always JNI (Java native interface ) which can connect java with c,c++ or asm code. So yes it is possible

I've read something intersting here then I read in another place (I lost the link) the "benchmark"... Java is not the same Old Java...

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[Exophase]

Originally Posted by madprofessor

shadow didn't promote anything. nobody promoted anything. shadow just mentioned that he is working on this new project as a reply to another emu for psp. that's all there is to it.

you should have noticed that emu schene is a bit slow the last months maybe year and little things like this are worth to be mentioned don't you think?

Hm, should I answer that honestly.. maybe not. I'll just wait and see what happens with this then.

Yeah, with Java you can make a mid-level emulator performance-wise, you can write a dynarec to JVM. But when it comes to making the fastest PSP emulator you can Java won't deliver. There are just too many low level things you can't do. You're never going to be able to make memory accesses as efficient as they'd be with mmapping and you'd never be able to get the best generated code you can for things like VFPU code. You'd also have to use shaders to do a lot of PSP features so I hope Java's OpenGL has a good interface for them (and then you're back to coding in another language..)

I really just wonder what the appeal is to writing an emulator like this in Java.

[Shin_Gouki]

maybe you are talking about an EMU optimized using ASM but vertainly it seems you don'T know exactly what java is capable of(bytecode manipulation?), so guessing arround makes no sense.

For Sure you get some Pro's and Con's but i'm pretty sure that the Pro's will be more than enough to create an awesoem emulate which runs easily on all 3 major Platforms (win, Linux, Mac).

[Mad]

Its really nice to see another project on PSP.
And that "mad" isnt me

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[lunaris]

Gcc 4.3.0 can compile java 1.5 . It uses eclipse bytecompiler and then compiles bytecompiled code in machine code .It uses JNI .


Result: Good ,very good speed.Of course, it's not C ,but is fast.

Try compile Azureus.

Advantages:

Emulator works in GNU Linux, OpenSolaris,BSDs ,Windows, etc....

Very fast development, Java is very powerful and very complete.
Less bugs because of garbage collector and pointerless language.

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Last edited by lunaris; July 20th, 2008 at 06:12..

[mastrboy]

java being fast? don't believe it until someone actually proves it, instead of just stating that it is fast.

java apps are usually the most memory consuming stuff i have on my computer.

But i guess it's like all coding, if it's done right it can be good.

[Silenus]

That is great news.

Congrats to Shadowpcsx2 and Mad, wish you the best in this project.

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[shadowpcsx2]

you can always check the status of the emu at jpcsp.org • Index page

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[Shin_Gouki]

hey thats nice , i have a look into it

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yes i have a mac, so what?

[shadowpcsx2]

The first psp demo work now after one month of hard work

You can d/l src and build it if you wanna try For the rest that doesn't know how to compile just wait for an release. (soon as some stuff becomes a bit stable)

Attached Images

samplecw7.png (33.1 KB, 7 views)

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