On Fri, 2007-06-08 at 23:25 -0700, Vasile Surducan wrote:
> There is one big question: are those 6 jtags identical, used for the
> same type of
> FPGAs ? 

In the specific case I'm talking about 4 of the devices are the same,
while the other two differ from the 4 and from each other.

> My problem is that some devices (like DSPs) are not using a
> standard JTAG configuration, so common use of chained jtag loops could
> bring a lot of problems.

I'm surprised to hear that, in my limited experience with JTAG (outside
of the FPGA sphere) while some devices do have "non-standard" commands,
other devices just ignore them, so it's not usually a problem to chain
them together.

That said, in your case because this may be a large issue, perhaps it's
a good idea to just keep the devices separate to begin with.

TTYL

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