JTAG to send a syncronized pulse to a large chained set of dev kits?

Hi,

I have a set of these ARRIA V starter cards http://www.altera.co.uk/products/dev...v-starter.html

Without going into much detail regarding why this design choice,

I'd like to know if it is possible to use the JTAG header on the kit? (or JTAG via PCI Express. preferably.)
to send a synchronous trigger pulse to all the cards to run a module.

If yes, a few pointers regarding how would be very helpful. I understand one of the cards will have to act as the master.
Or the PC Motherboard they are plugged into in case of PCI Express.

Thanks
ZubairLK