I'd have to go dig up some old articles in the dreamcast mag or at segatech pages (or whatever its called these days )
But the sh-4 was modified for sega .
In order for the SH-4 to be modified for Sega there'd have to be an existing one on available and there wasn't. The DC was the debut product for it. What Sega did provide was design input (the addition of a few approximation instructions) that got implemented in every sequential SH-4.
Much like how the bluegene is being modified into the cell chip for sony .
Umm.. No.. BlueGene is a project/machine... Not a CPU...
err wrong. You'd have to modify a cd-rom drive in order to play a disc. That isn't off the shelf .
Aside from firmware, (BTW, my iPod and the DVD burner on my powerbook are not running the same firmware they came with, are they suddenly not off the shelf devices?) no you wouldn't... In fact that was the rather clever thing that Sega did do...
what does a faster sh-4 have to do with a home based naomi 2 ?
Nothing really, but you just mentioned a later DC would've featured higher clocked components...
Though at the same price point as the normal dc a year later they would have been able to add in a faster sh-4 (even if it was only 25-50mhz) more ram and a faster powervr dc chip. After all the pc version was a 125 mhz instead of a 100mhz .
Would that minor improvement been worth the additional year? I certainly don't think so...
Just becasue they didn't push the sh-4 faster doesn't mean they coulnd't have.
Sure... And Sony could've pushed the EE and GS to faster clock speeds and launched with a faster machine... And if Intel would've tried just a little harder they could've eeked a higher clock off of the P3... But none of that happend (and didn't happen for a reason) thus it's pretty much academic at this point...
hell my uncle has a dishwasher that has a sh-4 in it. Why in gods name would they need a faster cpu in a dishwasher ?
What the hell is it doing with an SH-4? More likely an SH-2 or maybe an SH-3...
The component of the design on which SEGA was keen to see expanded that used an internal FPU for SIMD capabilities?
There wasn't any... They added fast trig approximation instructions...
Right, so the state of their technology was more advanced at the later date.
Yes, but not on the timeline that some seem to be implying...
The design was customized largely to SEGA's specification.
I think you need to do a little more analysis and comparison of the SH-7091 and the SH-7750... You might be surprised how little "customization" was needed...
The talent of PowerVR's engineers is not contingent upon the commitment of their licensees.
Nor did I say they were... I simply implied a NAOMI 2 style design for the DC would've been considerably more expensive for SEGA to manufacture (especially at a time when DRAM prices were rather volatile), and would've more critically affected SEGA's financial health...
The sh-4 is a great chip , nec should be congratlated. The elan and the powervr chip are great , they should be praised.
Well I think NEC should receive more praise for the PC Engine than the DC..
Really SEGA, Hitachi, and (I guess at the time VideoLogic?) are the ones who deserve the pats on the back...
As for the SH-4, while I'm a pretty big fan of SuperH in general, there's quite a few gripes one could levy at it (many of them being the same gripes thrown at the EE core)...