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  1. #1
    Forum Moderator PS3 News's Avatar
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    Patent Shows PS3 to PS2 Backwards Compatibility - No PS2 Chips!

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    PlayStation 2's use the emotion engine as a processor, which was removed from PS3s to save money.

    This killed off PS2 backwards compatibility, but Sony has a new software solution.

    A patent filed by Sony has a method for the cell processor to emulate the emotion engine which can bring PS2 backwards compatibility to all PS3s.

    To quote: There are two main ways to emulate hardware. Interpretation is when target code is decoded and converted into a language the host can understand. The other strategy is to decode and recompile programs in the host's language.

    Maybe the concept is better explained another way. Interpretation is like having someone constantly translating English to Japanese for you, non stop, twenty four hours a day wherever you go. Decoding and recompiling is like someone translating a sets of words and putting them in a dictionary you can reference.

    Sony developed a way to translate instructions from an Emotion Engine chip into chunks that can be referenced.

    Figure 2 from the patent is a schematic drawing of how the system works. Figure 3A is a drawing of the PlayStation 2's chipset. Figure 3B is the emotion engine. Figure 4 is where the whole story gets interesting! It's "an example of a host system based on a cell processor that may be configured to emulate the target system." The target is figure 3B, the Emotion Engine.

    There aren't too many reasons why Sony would want the PS3's Cell processor to emulate the PS2's Emotion Engine and the key one is backwards compatibility.

    Perhaps, a firmware update or the new PlayStation 3 slim, which Ars Technica say is coming this fall, will utilize this technology.


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  2. #2
    Contributor Wonderkik's Avatar
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    I don't really understand. I have a 60g launch Pal PS3, without Emotion Engine, and it plays Ps2 games just fine...

    How comes this is news? Of course Ps3/Ps2 backward compatibility was emulated somehow at least on the model I have...

  3. #3
    Forum Moderator PS3 News's Avatar
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    Cool

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    Quote Originally Posted by Wonderkik View Post
    I don't really understand. I have a 60g launch Pal PS3, without Emotion Engine, and it plays Ps2 games just fine...

    How comes this is news? Of course Ps3/Ps2 backward compatibility was emulated somehow at least on the model I have...
    It's good news mainly for those who don't currently have it (newer 80gb's, 40gb's and 160gb consoles without backwards compatability)... as the last part of the article suggests a firmware update or the PS3 slim may utilize this technology.

  4. #4
    Senior Member BlingOnMyWrist's Avatar
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    Quote Originally Posted by Wonderkik View Post
    I don't really understand. I have a 60g launch Pal PS3, without Emotion Engine, and it plays Ps2 games just fine...

    How comes this is news? Of course Ps3/Ps2 backward compatibility was emulated somehow at least on the model I have...
    Because it could bring backwards compatibility to ALL PlayStation 3s. (Right? or is this just for the new slim model?)

  5. #5
    Junior Member aries2k6's Avatar
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    Ya, I´m a little confused about that myself. I wish my pal ps3 had the EE chip but I had to settle for emulation. It still has the GS chip though.
    So what would emulate the GS chip on new ps3s, the CELL or the RSX?

  6. #6
    Forum Moderator PS3 News's Avatar
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    Red Face

    For some reason the source article didn't link to the patents.. after a brief search, I believe these are the ones mentioned for anyone interested:
    Code:
    http://appft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=1&f=G&l=50&co1=AND&d=PG01&s1=%22Emotion+Engine%22&s2=Cell&OS=%22Emotion+Engine%22+AND+Cell&RS=%22Emotion+Engine%22+AND+Cell
    
    http://appft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=6&f=G&l=50&co1=AND&d=PG01&s1=%22Emotion+Engine%22&s2=Cell&OS=%22Emotion+Engine%22+AND+Cell

  7. #7
    Junior Member aries2k6's Avatar
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    Hmm, in my opinion they got the label on the source article wrong.
    They should have put "Full ps2 emulation on all ps3"
    That´s what I make from those diagrams. It seems to emulate the ps2 completely.

    Heh, some of the devs here had said that the ps3 has had ps2 emulation a few firmwares ago and here's another confirmation

    I wonder when they´ll release this. Maybe they are saving it for the ps3slim to launch.
    Last edited by aries2k6; 06-29-2009 at 11:38 PM Reason: typo

  8. #8
    Contributor semitope's Avatar
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    Quote Originally Posted by Wonderkik View Post
    I don't really understand. I have a 60g launch Pal PS3, without Emotion Engine, and it plays Ps2 games just fine...

    How comes this is news? Of course Ps3/Ps2 backward compatibility was emulated somehow at least on the model I have...
    Your launch ps3 had the hardware to play the ps2 games, my 40gb does not so this is big news to me. The latest ps3s can only play ps2 games by a method like this.

  9. #9
    Senior Member adrianc1982's Avatar
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    If they can make every single ps3 have ps2 compatibility my wild guess would be they are trying to make the same they did with the ps1 classics. That means we will have the best ps2 games on the psn to buy for 15$-20$ which is very good. Having a digital copy saves space, its easy, fast, fun plus it can be carried from account to account.

    Not only that there are people that cant get those games as easily as people in the states, for instance my self. Having a packed psn store with ps1 and ps2 classics is like christmas to us non-usa people. Another great thing about this is you get the games whenever you want them for a resonable price.

    Lately Sony has proven to have a lot of interest in online store and so far so good. I hope we get to have ps2 emulation for free on every single console so we can have full games right off the store. Theres people out there that have the money and want to buy those games but are unavailable.

  10. #10
    Registered User justMaD's Avatar
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    they have to patent a technology that noone else is allowed to use anyway?

 

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