JYTEK PCIe-68638 Series, User Manual

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Leading
EDGE COMPUTING
PCIe-PXIe- 68638 and PXI Express chassis. If PCI bus
num-bers are occupied, the system may not boot
correctly, or devices will not be detected.
Theoretically, PC systems implementing PCI Express can
support up to 256 bus numbers. However, the maximum
PCI bus numbers of many PC systems are frequently lim-
ited by the system BIOS based on the system design or
architecture. Conversely, the PXI Express chassis con-
sumes many PCI bus numbers. Each PXI Express periph-
eral slot reserves a PCI bus number, and PCI Express
switches on a PXI Express chassis also occupy several PCI
bus numbers. Some peripheral modules may also consume
PCI bus numbers. PCI bus number requirements for
JYTEK PXI Express chassis are as shown.
Table A-1: PCI Bus Number Requirements
Third party utilities like System Information Viewer (http://rh-
software.com/) are able to check available PCI bus num-
bers in the system BIOS (Run SIV>>PCI Bus>>ACPI
Buses), as shown.
Figure A-1: Bus Number Information Result
Model
PCI Bus Number
Requirement
PCIe-PXIe- 68638 + PXES-2590 27
PCIe-PXIe- 68638 + PXES-2780 44