> I think modern SD cards have improved quite a lot. On the computer, I get
> consistent 80Mb/s+ writes.

Don't forget that will be using the 4 bit parallel interface, not the SPI i=
nterface. The SPI interface is really a legacy interface that does not seem=
 to be well supported. Go and look at Joe's (IVP) thread over the last mont=
h or so about interfacing an SD card using SPI.

To use the parallel interface you really need to be a member of the SD grou=
p to get the required documentation, although there is some in the wind, if=
 you can find it.

But I am confused about what sort of analyser you are attempting to build. =
When you first posted I got the impression that you were looking at 'self c=
apturing' what was happening on a PIC32, but now I get the impression you a=
re building something to capture waveforms on other equipment. Is this corr=
ect?


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