Chapter 2
Functional Overview
©
National Instruments Corporation
2-5
VXIpc 800/700 Series User Manual
CPU, chipset support that connects the CPU
subsystem to the PCI bus, and the system cache
and RAM.
System I/O
This block has the bridge between the PCI bus
and the ISA bus. It also has PCI bus arbitration
logic and integrates PC-specific hardware such
as the DMA and interrupt controllers.
PCI Expansion Slot
This is a general-purpose PCI slot. It can
accommodate any standard 5 V, 32-bit PCI card
with a modified mounting bracket.
ISA Expansion Slot
This is a general-purpose ISA expansion slot.
The VXIpc-860 can accommodate a half-length
XT-size card, while the VXIpc-850 can
accommodate a full-length XT-size card.
However, the DRAM configuration may
mechanically interfere with a full-length card.
Refer to Appendix F, Modifying and Installing
I/O Expansion Boards, for more information.
SCSI
The SCSI circuitry uses a PCI-SCSI bridge to
provide a flexible SCSI-2 connection on the
front panel, usable for such devices as external
hard disks and CD-ROM drives.