Lava Computer 650 - Manual (Page 8)

8
Because the LavaPort 650 is a PCI device, Windows will always allocate
non-standard I/O resources to this port (e.g. Assigning it as Com 5, even
though any one of Com1-4 may be free). If your software requires the
use of standard I/O resources, you may modify those used by the
LavaPort-650 in one of two ways:
Click on the Resources Tab in the LavaPort 650 listing in Device Manager.
A screen similar to the following will appear:
Modifying the Com numbering
and IRQ of your Port