NEC HX4500, User Manual, Page: 94 / 160

Upgrading Your System 4-23
Option Boards
The following paragraphs describe how to install and remove ISA and PCI option
boards. The system I/O board has two dedicated ISA bus master expansion slots and
nine dedicated PCI bus expansion slots (see Figure 4-13).
The high-performance PCI local bus allows the adoption of newer networking
technology, such as 100 Mega-bit/second Ethernet NICs, with a minimum of effort and
without concern for I/O bottlenecks. The PCI local bus offers up to 133 Mega-
byte/second bandwidth.
P2 PCI #11
P3 PCI #12
P11 ISA #1
P12 ISA #2
P4 PCI #21
P5 PCI #22
P10 PCI #34
P6 PCI #23
P7 PCI #31
P8 PCI #32
P9 PCI #33
Figure 4-13. PCI and ISA Slot Locations
Installation Considerations
Newer adapters, designed for Plug-and-Play systems, are automatically configured by
the system without any user intervention. Older ISA adapters must be manually
configured as detailed below. Once the manual configuration is complete, the Plug-and-
Play adapters are configured around the manually configured adapters without causing
any resource conflicts.