ADLINK PCIe-PXIe-8638 - Manual (Page 26)

16 Troubleshooting (FAQ)
Answer: Limited PCI bus availability is the major concern about
compatibility. Available PCI bus numbers assigned by sys-
tem BIOS may exceed PCI bus numbers required by the
PCIe-PXIe-8638 and PXI Express chassis. If PCI bus num-
bers are occupied, the system may not boot correctly or
devices not detected.
Theoretically, PC systems implementing PCI Express can support
up to 256 bus numbers. However, maximum PCI bus num-
bers of many PC systems are frequently limited by system
BIOS based on system design or architecture. Conversely,
the PXI Express chassis consumes many PCI bus num-
bers. Each PXI Express peripheral slot reserves a PCI bus
number and PCI Express switches of PXI Express chassis
also occupy several PCI bus numbers. Some peripheral
modules may also consume PCI bus numbers. PCI bus
number requirements for ADLINK PXI Express chassis are
as shown.
Table A-1: PCI Bus Number Requirements
3rd party utilities like System Information Viewer (http://rh-soft-
ware.com/) are able to check available PCI bus numbers in
system BIOS (Run SIV>>PCI Bus>>ACPI Buses), as
shown.
Figure A-1: Bus Number Information Result
Model
PCI Bus Number
Requirement
PCIe-PXIe-8638 + PXES-2590 27
PCIe-PXIe-8638 + PXES-2780 44