Upgrading Your System 4-19Option BoardsThis section describes how to install and remove ISA and PCI option boards. The system board hastwo ISA bus expansion slots and four PCI bus expansion slots. One of the ISA connectors shares achassis expansion slot with a PCI connector.The high-performance PCI local bus allows the adoption of newer networking technology, such as100 MB/second Ethernet NICs, with a minimum of effort and without concern for I/O bottlenecks.The PCI local bus offers up to 133 MB/second bandwidth.ISA 2ISA 1PCI 1PCI 2PCI 3PCI 4PCI and ISA Slot LocationsInstallation ConsiderationsNewer adapters, designed for Plug-and-Play systems, are automatically configured by the systemwithout 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 themanually configured adapters without causing any resource conflicts.ISA adapters can be Plug-and-Play. ISA adapters that are not Plug-and-Play must be manuallyconfigured following the instructions supplied with the board. The configuration is defined to thesystem by creating the ISA configuration file when running the SSU. If you are adding a non-Plugand Play ISA option board, run the SSU before installing the board. For details on running the SSU,refer to Appendix B.Controller/Adapter Hardware ConfigurationsThis table lists the option boards you may add to your system that require specific installation slotsand provides information on memory and I/O addressing and assigned interrupt request number(IRQ).Option Board Hardware ConfigurationsOption Board IRQMemoryAddressI/O Address Option SlotNEC SecuRAID 110(Mylex AcceleRAID 150)NEC SecuRAID 210(Mylex AcceleRAID 250)Set by BIOS Set by BIOS Set by BIOS PCI Slot 2 (see PCI/ISA Slot Locationillustration above)
