ADLINK PCI-C588/PCIe-C588/C584 - Manual (Page 30)

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• Software Installation
2. The card with the “ON” jumper will have lower COM port number.
The card with the “OFF” jumper will have its COM port number
subsequently following the “ON” card.
3. We suggest users set the jumper “ON” for the first card to be
installed in one system.
4. PCIPORT card can be used in interrupt shared modes. The PCI
BIOS will assign IRQs for each PCIPORT card. For
multi-PCIPORT applications, users can just share one IRQ for
each card. Users must confirm that the system has at least one
free IRQ Plug and Play.
For multi-PCIPORT card installation, note the following:
1. To install two of the same PCIPORT cards in one Linux system,
set one card's jumper to “ON” and the other to “OFF”.
2. PCIPORT card can be used in interrupt shared modes. The PCI
BIOS will assign IRQs for each PCIPORT card. For
multi-PCIPORT applications, users can just share one IRQ for
each card. Users must confirm that the system has at least one
free IRQ Plug and Play.