PS1P WIP News Update - DCEMU Exclusive - PSOne Emu for PSP Coming Soon

[BL4Z3D247]

So do U think it will be at Full Speed after the Dryanec engine is installed since the some game run Quote "Perfect"?
it should about double the speed it's at now(well the last build Wraggy got)

[quzar]

it should about double the speed it's at now(well the last build Wraggy got)


Well, as long as we're throwing out arbitrary numbers: Unicorns are 4x smarter than pixies, but only when it's raining on tuesdays. Otherwise it's 3.2*the ratio of the length of their horn to the said pixie's wing.

[mr_nick666]

A normal cpu emulator uses a method called interpretation. Basically it checks to see what the next opcode of the program data is and performs operations to mimic that.

With a dynamic recompiler, the same thing is done, except in assembly. THEN there is also recompilation of common sets of operations. A simple example might be a sequence of operations that result in the the log of something being calculated. instead of doing the set of basic additions, subtractions, multiplications and loopings, if the host machine supports it you could do a single function to do the same thing. By this method you could actually in theory run a cpu emulator on a machine that is slower but more powerful than the emulated machine, by performing the same end result using less instructions (and therefore less processor time).

Youre not a teacher are you because that actually made sense! :confused: Ive been interested in what a dynarec does - now I know! :p


Well, as long as we're throwing out arbitrary numbers: Unicorns are 4x smarter than pixies, but only when it's raining on tuesdays. Otherwise it's 3.2*the ratio of the length of their horn to the said pixie's wing.

/\ /\ Sarcasm is a blessed thing :D You made me laugh out loud! ;) What is your feelings on Goblins? (or is that outside your area of expertise?) :rolleyes:

[Tooplex]

This is so uterly fake if it wasent why hasent he relesed it?

[quzar]

Youre not a teacher are you because that actually made sense! :confused: Ive been interested in what a dynarec does - now I know! :p

Actually, after seeing snipr's post I felt like I should give a more detailled explanation, got a few words in then realized...he...wtf is a dynarec?? Which I simultaneously realized is probably the reason why I have never been able to start writing one, as by the basic concept, I didn't see the difference between it and an interpreter written in assembly, and now I realize there is no big difference, it is simply an expanded version that better takes advantage of the features of the host processor. Oh, so yea, in order to find out I carefully reread a few websites that I had been to before, and really take it in.

Anyways, as for the sarcasm, one of my pet peeves is when people throw out random numbers about things like that, so it came easily.

Carry on folks, no goblins here.

[Uzumaki_Naruto]

if we ask nicely maybe AC will release one of the betas so we can play? pleaaaaaaaaaaaaaaaaase...

[Cap'n 1time]

This is so uterly fake if it wasent why hasent he relesed it?

The real question is.. if I have never seen you before... how do I know your real?

Wraggster owns this site and has never given us bad information. If he says its real, then its real.

[quzar]

The real question is.. if I have never seen you before... how do I know your real?

Wraggster owns this site and has never given us bad information. If he says its real, then its real.

As a proof that's a slippery slope, as it's hard to prove that no news that wragg has ever given us has been false, here it's a matter of wether or not he would lie about it. One could argue that a month from now, he could make a news post saying that the anonymous coder has decided against releasing it and has asked for wraggster's own copies to be deleted, and that he complied, and so he will be the only one to have ever used it. From that standpoint we can't quite prove that it isn't some sort of elaborate hoax that has no drawback and garners much traffic for the site.

I however can attest to the fact that when I deduced who it was that was creating this and what it was based on, I was told specifically that I could not and should not make that information public (for reasons ungiven). So, unless this is some sort of far-reaching conspiracy, I'd say it exists (which says nothing as to it's speed, wether or not it's ever going to be released, or whatnot).

[Tooplex]

Still my answer hasent been answered if it isnt fake how come he doesnt relese it!

[Cap'n 1time]

Still my answer hasent been answered if it isnt fake how come he doesnt relese it!

because the creator of this port dosnt feel it is ready. No doubt the creators of snes9x tyl already have a wip build, but they wont release it till they are ready.

Another example. Halo 3 is in development. We havnt gotten a beta to test or anything, We do however trust the people that are releasing media and news on it so we dont doubt its real... do we?

[Kramer]

Another example. Halo 3 is in development. We havnt gotten a beta to test or anything, We do however trust the people that are releasing media and news on it so we dont doubt its real... do we?

Yeah kinda like "GT Mobile" on the PSP:p

[DPyro]

Duke Nukem Forever! :D

[Cap'n 1time]

Duke Nukem Forever! :D

yes.. it will be ready... when its ready... BUT THE POINT IS IT ISNT FAKE! :)

[hockey2112]

Still my answer hasent been answered if it isnt fake how come he doesnt relese it!


Here are a couple of reasons, from four pages ago...

http://www.dcemu.co.uk/vbulletin/showpost.php?p=239563&postcount=228



But the primary reason is: the coder doesn't want to release a public beta yet.

[Tinnus]

Actually, after seeing snipr's post I felt like I should give a more detailled explanation, got a few words in then realized...he...wtf is a dynarec?? Which I simultaneously realized is probably the reason why I have never been able to start writing one, as by the basic concept, I didn't see the difference between it and an interpreter written in assembly, and now I realize there is no big difference, it is simply an expanded version that better takes advantage of the features of the host processor. Oh, so yea, in order to find out I carefully reread a few websites that I had been to before, and really take it in.
You're missing a crucial point--the translation cache.

Each block of code that's translated to native code is stored in a cache--that way when the emulated CPU wants to run it gain, it's already translated and just waiting to be executed :)

[quzar]

You're missing a crucial point--the translation cache.

Each block of code that's translated to native code is stored in a cache--that way when the emulated CPU wants to run it gain, it's already translated and just waiting to be executed :)

Could you dip into the private coder forum for a bit?

[pkmaximum]

Does anybody have an idea, on how long it will probably take though to implement a dyranec engine for the PS1 if its being coded completely from scratch.

[Tinnus]

It's hard to tell. Depends a lot on luck, the coder's skills, and debugging capabilities.

The problem to debug a dynarec, though, is that you generate code at run-time, and dynamically-generated code cannot be hooked up to a debugger to, say, do breakpoints, step through code or anything like that.

[Zaitmi]

Hi guys, I'm new here to the forums, and I wanted to ask a question. How is the anonymous coder making the PS1P faster without a dynarec engine? I'm not a coder, but I wanted to know.

[Cloudhunter]

Just optimizations in the code, it is the same as any program really.

Cloudy

[Tinnus]

Yes, and also en emulator is not just a CPU. There's a GPU, controls, memory cards, interrupts, memory, movie decoding, CD-ROM reading... lots of other stuff to optimize.

[pkmaximum]

Yes just look at PSmonkey's emulator for example. It was running Quest 64 at great speeds, on just a pure interpreter core alone. So with good optimization skills, and a dyranec engine. And you could possibly be looking at full speed N64 with sound support I suppose. And the sound can just be executed through the media engine.