Take a look on Altera's site for JAM.  Its been a few years (ok...7?) when I last was using it but I thought it was meant to be a more generic JTAG programming interface.

Bob Blick <bbblick@sbcglobal.net> wrote:  Hi Forrest,

Once I tried to follow the same path. I gave up, and now I have three
different JTAG programmers. All is well.

Cheerful regards,

Bob


Forrest W Christian wrote:
> I'm in need of a JTAG interface cable for a project I'm working on. I'm 
> trying to figure out the best way to proceed.
> 
> In short, it looks like although the JTAG interface on the 
> system-under-test-or-programming side is fairly standardized, the 
> interface on the PC is anything but. It looks like to program a device 
> via JTAG, you need an appropriate pice of software on the PC which knows 
> how to drive the JTAG for that device to do the programming. It also 
> looks like each of these software packages only support certain cables, 
> and which ones don't appear to be well documented at all.
> 
> For the immediate project I could build a cable, but would prefer to 
> find a solution which will work for almost anything I need it for JTAG 
> wise since it seems that there are getting to be more and more projects 
> which need a JTAG "programmer" for some part of it. In fact, right now, 
> I have two projects to work on - the critical one, and another which has 
> been waiting in the wings.
> 
> For those of you which use JTAG, which interface cable would you 
> recommend I build or buy for the broadest support of devices?
> 
> -forrest
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