He refered to "the other bus", the RSX has a split 256bit bus (128bit both ways), one to GDDR3 and one to XDR.
EU PS3 = Software PS2 Emulation
- Thread starter inefficient
- Start date
He refered to "the other bus", the RSX has a split 256bit bus (128bit both ways), one to GDDR3 and one to XDR.
Rainbow Man
Veteran
I'm not very technically inclined but that wouldn't make much sense I think.
Surely XDR connects to Cell and not RSX?
So the connection between Cell and RSX would be across whatever is now in place instead of AGP or whatsitscalled that's used in the PC chip RSX is based on..
Oh well I might be wrong I dunno.
Peace.
The 18 GB/s figure which nAo had a question mark on was for the DDR. Then he added 'also don't forget the other bus' which is the XDR, for a total of 45 ish GB/s. The latencies on the 'other bus' must have an impact on emulated framebuffer work though. It's not comparable (AFAIK) to say "XDR+DDR for RSX provides enough bandwidth to be directly useable as thoguh the eDRAM on GS".
I'm not very technically inclined but that wouldn't make much sense I think.
Surely XDR connects to Cell and not RSX?
So the connection between Cell and RSX would be across whatever is now in place instead of AGP or whatsitscalled that's used in the PC chip RSX is based on..
Oh well I might be wrong I dunno.
Peace.
The Cell has a connection to the XDR RAM, and to the GDDR3.
So has the RSX.
I might be wrong here but i think the thing thats inplace instead of the AGP, is FlexIO
Holy shit. If someone told me MS bribes the media I would have believed him after this
Seeing this made me wonder if someone at Tom's misread a reference to removing the Emotion Engine as removing the Motion Engine.
A agree that is worrying indeed, but it could also be interpreted as they are busy testing through some PS2 titles to see which of them that are up to snuff with the current software emulation and they will be doing it right up til day the new firmware is released.
Then again they could give a hint about what kind of numbers they are talking about, but I guess that any number would be spinned in a bad way by the FUDers, so they might as well release it together with the March firmware which is promised to bring some significant improvements to the PS3, so good and bad news will neutralise each other.
Last edited by a moderator:
Oh my god, lol, that must be it! Incredible.
It seems that concern was valid after all.
http://www.watch.impress.co.jp/game/docs/20070226/ps3.htm
In the report of PC watch, the PR person at SCEI said EE+GS is removed from the new PS3 and a new graphics hardware equivalent to GS is added. What EE was doing is replaced with software emulation. The date when the Japanese version migrates to the new version is not yet decided.
So I guess the actual hit on backward compatibility is minimal. The cost of EE and RDRAM will be reduced OTOH.
Not really. In any case, here's the official confirmation of emulated EE and hardware GS: http://threespeech.com/blog/?p=293
I guess it is comparable to how serious they have been about emulation before, with the database testing all the games and with minute descriptions of tiny differences in emulation. This is why I have been skeptical on people who seem to think that after the announcement suddenly only about 20% of games would work. I think it's more likely that something in the direction of 20% of all games have some kind of problem.
DuckThor Evil
Legend
Ok so it seems the problem will be rather small. I'm pretty sure that most titles worth talking about will work. It seems the "new combination of software and hardware" actually meant exactly that :smile: I wonder whether this will be the final hardware model for PS2 emulation, or are they going to try/succeed getting rid of GS as well at a later time.
Good question, it probably is hard to get rid of it all together. I wonder if it is a separate chip or if it's integrated together with some other functionality.
I also wonder if the new solution includes EDRAM, which is rather expensive, or if they piggy-backed some standard DRAM on to the logic chip which has been a solution used in previous cost-reductions by Sony.
I hope someone will tear the new SKU appart to help us find out.
DuckThor Evil
Legend
I also wonder if the new solution includes EDRAM, which is rather expensive, or if they piggy-backed some standard DRAM on to the logic chip which has been a solution used in previous cost-reductions by Sony.
I hope someone will tear the new SKU appart to help us find out.
I'm guessing that the eDRam is so integral part of GS that it can't be removed, so I bet it's still there. I'm no expert though.
Well this is quite a move! Sony must have actually designed a 90 (65?) nm GS for inclusion. That's quite a cost for a mostly throw-away feature, so they're obviously quite serious about BC. The scope of compatibility shouldn't be too bad. If it was diabolical, why waste all that money designing and including GS? I guess revisions of the firmware might improve the emulator over ltime, like PC based emulators.
I also guess there's no likelihood of graohics improvements. Or could this revision of the hardware actually add stuff like proper mipmapping? Get some AA and texture filtering active, and Sony would win a lot of good reputation back!
I also guess there's no likelihood of graohics improvements. Or could this revision of the hardware actually add stuff like proper mipmapping? Get some AA and texture filtering active, and Sony would win a lot of good reputation back!
You can't improve resolution, aliasing and texture filtering outside of the render process. Once the image has been rendered, you can't post process it to native 720p or smudge out textures at a distance to lose the shimmer (and replace it with splodge). The best you could hope for is upscaling for HDTV users.