Since the 6503 has static DIO you'll have to control the transition in software. Typically, the determinism of software is limited to around 1kHz, but this is a function of your actual system. I'd recommend you investigate our M-series line of Multifunction DAQ cards which all have at least one port of hardware timed DIO.
Low cost solutions that you might consider include the PCI-6221 or perhaps the USB-6251.
Let me know if you have any more questions!
Message Edited by Elijah K on 04-02-2007 12:24 AM
Elijah Kerry
NI Director, Software Community
