Hello,

On Sat, Nov 21, 2009 at 4:42 PM, Duane Ellis <open...@duaneellis.com> wrote:
> Recently, I've been using quite a few commercial jtag tools from chip
> vendors.
>
> One thing I've noticed is that they all have implement the design with
> an small usb-controller + FPGA of some type (typically a xilinx
> spartan). I can see the real benefit, they download and flash the target
> at an unbelievable speed, ie: couple seconds for 256K of data. In
> contrast, non-fpga solutions, (bitbang & ftdi, etc) are much slower overall.

If someone wants to go down that road, I think the BeMicro solution is
quite nice.
It's a USB dongle with modern FPGA and 80 pin (or so) header, priced $49.

The software to develop the FPGA code is freely usable, and available for Linux.

I'm in no way affiliated with them.

Regards,
-- 
Leon
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