We don't supply any drivers for "INtime" or "iRMX" operating systems. Since you said "for Windows", we do provide Windows drivers, but I can't say whether those will help you out or not.
National Instruments does not directly provide GPIB
drivers for these operating systems. TenaSys has apparantly
created drivers for the InTime operating system based on the
NI-488DDK. National Instruments has not evaulated these
drivers. You may want to talk more with TenaSys to understand
what they offer.
TenAsys supports NI GPIB interfaces for our INtime real time operating system. Please contact us directly for any follow up questions mailto:info@tenasys.com