Gorf, on Thu Jul 19, 2007 9:25 PM, said:
Fighter17, on Thu Jul 19, 2007 8:48 PM, said:
FYI:
3DO > Jaguar

Please clarify...in terms of raw power, not a chance. Jaguar
has at least twice the data moving power. Two 27 mhz
RISC chips against one 12 MHZ ARM...Not on its best day.
Games available fine...its not by any means a Jaguar in power.
Not entirely accurate, IMHO, Gorf.
Two 27 Mhz RISC chips in Jag, one of which is Jerry on which the DSP is housed which is 32-bits internally but tied to the bus at 16-bits, the other which is Tom and houses the 32-bit GPU and 64-bit Object Processor and Blitter and a 16/32 68k vs. the 12.5 Mhz ARM (which is a RISC device as well) of a different design (and, as such, quoting clock rates isn't a really good tool for comparison) and a math co-processor for helping to offload heavy lifting for the ARM, and two 25Mhz 32-bit video co-processors (which are basically to 3DO's ARM as the Blitter and Object Processor are to Jag's GPU) and a 16-bit DSP.
So it's not two 27Mhz RISC chips in the Jag. It's a 32/64-bit RISC (Tom: GPU 32-bits, Object Processor and Blitter 64-bits) tied to a 64-bit bus, a 32-bit RISC (Jerry) that is tied to the bus at 16-bits and can do more than sound work and a 16/32-bit 68k tied to a 16-bit bus (but we can ignore that one obviously).
And in 3DO it's not one 12 Mhz ARM, but a 12.5 Mhz ARM CPU, a math co-processor that speeds up the math and therefore off-loads some of the workload from the ARM, two 25Mhz 32-bit video co-processors (the heart of the graphics operations in 3DO much like the Blitter and Object Processor are for Jaguar), and a 16-bit DSP.
Furthermore, although Tom is rated at 27Mhz, it is not of the same design as the ARM60 that 3DO uses, so comparing clock speed in such a case isn't a good indication of power. Undoubtedly, though, the OP and Blitter in Jag have the advantage because they are can shift more data (at 64-bits), as does the GPU even though it is 32-bits due to the fact that it is still tied to the 64-bit bus. But 3DO
might have the advantage here in computational power due to the design of the ARM60 and the addition of a math co-processor that can help off-load the burden on the ARM and thus speed things up. On Jag, to help out the GPU working as "CPU" like the math processor does for the ARM in 3DO would necessitate going to the DSP or the 68k as a co-processor of sorts (for game logic, AI, etc.). The latter, as you've said, is complete ass. The former would be better if the DSP were tied to the bus at 64-bits or even 32-bits, but because it's tied to the bus at 16-bits it would slow things down just as the 68k did (though not as drastically because the DSP is a true 32-bit chip).
So I'd say 3DO might have the advantage in game logic, AI, etc., however slight that may be. Jag has the advantage in graphics, but really only if one uses the type of development that you are using (which is not using the 68k and instead using the GPU as the "CPU"). Otherwise...well, as we've seen with our own eyes, no.
Add to that the inherent difficulty in Jaguar development vs. 3DO development and it may be, IMHO, another case of PSone vs. Saturn, or rather PSone vs. N64. Or even Dreamcast vs. PS2. That is, the former in each case was much easier to develop and therefore could be on a much more even keel with the latter, even though the latter in each case
could have been seen as more powerful if they were designed "properly" (that is, properly for game development).