Quote:
Originally posted by Mr_Furious
Well yes and no. The PS1 is emulated at least for the processing of graphics. Other calculations do have their own dedicated PS1 chipset and the only common chip used on PS1/PS2 is the sound processor.
OK, I did not know that. I was under the impression that the PS2's I/O chip contained the vast majority of the PS1 chipset (or a condensed version of it).
Quote:
Originally posted by Mr_Furious
The PS2 emulates and recalculates how polys are rendered which is the reason for incompatibility with some games.
Wouldn't this support what I said earlier? If this "emulation" is done at the PS2 level, then by virtue of the PS3 including PS2 compatibility, it must include this feature also.
If the PS2 hardware still contains some unique PS1 chips that are only used for PS1 games and completely unused for PS2 games, then those chips could be omitted if (assuming the rumors are true) PS1 compatibility is going to be discarded in the PS3. The questions then become: How much of the chipset is unnecessary to retain compatibility with PS2 games? How much monetary savings would be realized by omitting these chips?
If the cost of these chips is relatively low, then it might be better for Sony's image in the public eye if they simply include them in the PS3 and retain PS1 compatibility. Some people like not having an extra console hooked up if they can help it. Also, Game Boy Advance has already set a precedent by successfully implementing backward compatibility to two generations back--why shouldn't Sony follow suit?
Quote:
Originally posted by RoleTroll
That's exactly what I expected. The Genesis had the SMS's Z-80 for the sound chip, the PS2 uses the PS1 for I/O -- that's fine, but it only goes back one generation. Sega said that adding Genesis capabilities to the Saturn would add nearly the cost of a Genesis to the price of the Saturn.
Well, the Genesis and Saturn have a lot less in common with each other than the relationship between PS1 and PS2. Externally, the PS2 uses the same physical interfaces for controllers, memory cards, A/V cables, and power cables. The PS2's DVD drive can also accept PS1 CD games. It was clearly designed with backward compatibility in mind.
Quote:
Originally posted by RoleTroll
Did you really think the PS9 would be housing nine different consoles? Not bloody likely. The Xbox, on the other hand, should be able to do that kind of backwards compatibility with ease ... for free. Using off-the-shelf PC parts is costly, but it does have some advantages.
I'm not so convinced that this would be free, either. Already, there are strong rumors saying that Microsoft might choose ATI for the graphics chip for their next system, instead of Nvidia as they did with the X-Box. I remember the ballyhoo about Nvidia's X-Box graphics chip being not your garden variety GeForce 3 or GeForce 4, but a custom solution tailored specifically for the X-Box. If that is the case (as per Microsoft hype and fanboy frothings), then I wonder just how much intellectual property Nvidia is willing to cough up to the rumored Microsoft/ATI alliance if Microsoft feels like retaining backward compatibility with the original X-Box system.