I don't understand how one can compare altivec to a DSP: they have
completely different purposes. The DSP is perhaps better compared to a
RISC processor, since it does most things in a single cycle, but no
DSP that I know of has the parallel processing capabilities of altivec
and many (such as the one on the NeXT) don't do floating point. One
the other hand, one can do digital signal processing very nicely using
altivec, but that would be under-utilizing its capabilities, in my
opinion.
Does this "Photoshop" card have a PCI version?
Warren Nagourney
On Saturday, June 14, 2003, at 12:40 AM, Bryan Jones wrote:
Ahhh, but at one time Macs did have DSP's on the motherboard and one
could add more with a Photoshop card. I had a Quadra 840av that would
run rings around even much later PowerPC's for functions that called
on the DSP chips. The Altivec is certainly an effort at making this
speed possible and perhaps one could argue that it is really no
different. You could optimize your code for built in DSP's or you
could optimize it for Altivec (if it can be done with vectors).
Bryan
On Saturday, June 14, 2003, at 01:07 AM, Georg Tuparev wrote:
On Saturday, Jun 14, 2003, at 01:55 Europe/Amsterdam, Warren
Nagourney wrote:
For the last few years I have been using an old turbo color
NeXTstation for this purpose - it has a built-in DSP and I have been
able to use it to control an experiment using the digital
inputs/outputs from the DSP and count photons (up to 1 MHz) using
the DSP. I am delighted with the performance of the NeXT (for an
'040 machine) and ease of programming (in Obj. C) and want to
upgrade to one of my old beige and BW OSX boxes. Unfortunately, the
Macs didn't come with a DSP, so I need to add one (the NeXT also had
DSP drivers in the free MusicKit). (The alternative Labview approach
to DAQ is completely unacceptable to me, with its limitations on the
Mac)
Yeah! Mathematica runs on my old good 25MHz pizza NeXT station faster
then on my 1GHz G4. If Steve & Co. are so crazy about music, I wonder
why they do not take the next obvious step and put DSP in every Mac.
... just dreaming...
Georg Tuparev
Tuparev Technologies
Klipper 13
1186 VR Amstelveen
The Netherlands
Mobile: +31-6-55798196
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Bryan William Jones
email@hidden
University of Utah School of Medicine
Moran Eye Center Rm 3407
75 N. Medical Dr.
Salt Lake City, Utah 84132 http://prometheus.med.utah.edu/~marclab/
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