PictureTel III ISA - Manual (Page 67)

Changing the I/O Base Address or the Interrupt Request Level 5-3
Windows NT
Follow these steps to change the IRQ level assignment or the
I/O base address in a Windows NT PC:
1 Double-click the 3Com icon in the taskbar tray.
The General tab of the 3Com NIC Diagnostics program appears.
2 Select the Configuration tab.
3 Select the resource (I/O base address or interrupt request
level) that you want to change in the Network Parameter
column of the list box.
The current value for that parameter appears in the Set Value
entry box.
4 Scroll to the value that you want to assign, and then
click OK.
5 If you change the I/O base address, before you restart
Windows NT, make sure that the address that you assign
matches the I/O base address on the Adapters tab screen.
Follow these steps to verify the base addresses:
a Double-click the My Computer icon, double-click the
Control Panel icon, double-click the Network icon, and
then select the Adapters tab.
3Com EtherLink III (3C509) ISA Adapter is selected.
b Click Properties.
The I/O Port Address value appears in the scroll box on the
3Com EtherLink III Adapter Card Setup screen.
Ensure that this value matches the value set in step 4.
To change this value, scroll to the matching value, and
then click OK.
c Click OK to close the 3Com NIC Diagnostics program.
6 Restart the PC.
The hardware conflict should be resolved. If not, consult your
system administrator.