Ports for switches DS2 to DS5 (DS9 for 8 port version) must be strapped starting at the adapter's base address as given in the table and incrementing by 8 for each port.
The following example is for COM1 at 110:
If COM1 is used, then all the ports must be strapped as ``EVEN'' to interrupt request line 4 (see Digiboard documentation). If COM2 is used, then all the ports must be strapped as ``ODD'' to interrupt request line 3 (same notation). Only revision C and later adapters are supported.