Andrew Kohlsmith wrote:
On Friday 26 May 2006 11:15, Rich Adamson wrote:
Have you dug into the TDM400 far enough to know whether the common
complaints are associated with a hardware design issue, TigerJet issue,
or driver? (eg, can any of the issues truly be addressed?)
My personal opinion is that the TJ320 (the PCI interface chip) is crap.
Total, utter, complete, absolute crap.
It can work, yes, but it's first and foremost an economy PCI interface. It's
like the Plexor PCI interfaces that let you migrate your ISA design to PCI by
plugging a PLX9052 between your ISA interface and the PCI interface. It's a
cheap way to get your design on to PCI, but it is very inflexible and
VERY ... yuck.
My THEORY is that Mark started using it because it was easy to use, but when
he went to full-scale production and started selling these things he very
quickly discovered how different PCI bridges can be and how much trouble the
TJ320 can cause for a rapidly-growing hardware company.
The Xilinx Spartan II is much better and far more flexible (but much more
expensive, too). I don't doubt he has either personally or had is hardware
team research alternatives. They're a very busy and very, VERY smart bunch
of people. Mark has brought PCI hardware to the public and supports it,
which is something I have not done in any kind of volume.
I'd love to hear a detailed, technical response about what they've discovered
is wrong, what they are going to do, and where their new products are headed,
but I'd also like a 50 acre farm and some horses... :-)
Those are the same basic conclusions I came to, but I've never designed
a pci card so don't have the experience to say I could do it better. ;)
I kind of surmised some of that from the fact that the TigerJet has not
been used on any digium card after the first couple that were built.
R.
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