Detecting PCI-GPIB resources in QNX

[harry 265]

We produced a driver for the AT-GPIB ISA card some years ago. The driver communicated with the card using a port address and interrupt selected using jumpers. We want to port the driver to support the PCI GPIB card. Using a program to display the PCI card's resources reveals no I/O port has been assigned. Is there any hope of porting the old driver by simply substituting port and ir values obtained from the PCi BIOS?

[Kim L]

Hello Harry,

Its not as simple as changing the port address from the ISA board to the PCI board. PCI boards require certain memory windows to be assigned to the device, and then within those windows the MITE needs to be configured to open the TNT chip space. The best course of action is to use the NI-488 DDK which is designed for this purpose. The hardware layer will be provided along with OS layers for common Operating systems and architectures such as DigitalUnix, DOS, VxWorks, IRIX and HP-UX. They can copy the OS Layer closest to QNX to make the port easier.

If you have questions, please feel free to contact us at:

www.ni.com/ask

Have a good day.

Kim L.
Applications Engineer
National Instruments