It was reported that IBM micro drive was the fastest memory as
compared to SM and CF. A normal 7200rpm 3.5" hard disk today can
provide a sustain rate of over 30MB/s, the IDE interface is over
100MB/s. The potential of IBM micro drive is very high. I think the
JPEG compression in DC is handled by ASIC, if it has to be done by the
CPU even a 500MHz CPU will not be very fast.
C.H.Ling
"Richard F. Man" wrote:
>
> Heh, don't underestimate the problem w/ IO speed. This is the thing that
> allows a slow VAX or IBM mainframe to serve hundreds or even thousands of
> users while a super fast PC handles much less. D1x may be fast, but that's
> still 5 MegaPixels. That's a limit on how much you want to cache, write,
> transfer, etc. Flash is slow, magnetic harddrive is slower still. CPU speed
> is always going to be the least of the problem.
>
> And don't forget the magic phrase - "high fps." :-)
>
> At 04:33 PM 4/10/2002 +0800, you wrote:
> >Actually it is a complicated issue, we better say it is the system
> >speed. CPU has to be fast if you need to save as JPEG, if you use PIO
> >CPU also has to be fast. If you use DMA that is another issue, but I
> >think there is no fast DMA and low CPU speed system. I think the
> >memory card speed is also a issue. The faster one being the IBM
> >microdrive.
> >
> >30MB looks a lot today for low power system, but tomorrow it will be
> >nothing. I heard the D1x is very fast in saving file.
> >
> >C.H.Ling
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