NEC EXPRESS 5800 ES1400 SERIES Online Service Manual

Also see for NEC Express5800 Series: User guide User guide User guide User guide Configuration guide

Contents

1-8 System OverviewThe system board has four full-length PCI connectors. One of the connectors shares a chassisexpansion slot with an ISA connector. PCI features:n Bus speed up to 33 MHzn 32-bit memory addressingn 5 V signaling environmentn Burst transfers of up to 133 Mbpsn 8-, 16-, or 32-bit data transfersn Plug and Play readyn Parity enabled.Real-Time Clock/CalendarThe real-time clock provides system clock/calendar information stored in a non-volatile memory(NVRAM). The real-time clock battery provides power backup for the real-time clock.BIOSA BIOS and Setup Utility are located in the Flash EPROM on the system board and include supportfor system setup and PCI/ISA Plug-and-Play auto-configuration. A number of security, reliability,and management features also have been incorporated to meet vital server needs.IDE ControllerThe system includes a dual channel enhanced IDE interface controller. The controller has aprimary and secondary connector located on the system board, each connector supporting a masterand a slave device. The IDE controller provides support for the internally mounted standard CD-ROM, an optional tape drive, and up to three optional hard disk drives for a total of four IDEdevices.SCSI ControllerThe system includes a Symbios Logic SYM53C875 single channel PCI SCSI controller. Thecontroller is capable of operations using either 8 or 16 bit SCSI providing 10 MB/s (Fast-10) or20 MB/s (Fast-20) throughput, or 20 MB/s (Ultra) or 40 MB/s (Ultra-wide). As implemented, thecontroller attaches to a 68 pin 16 bit (wide) SCSI connector interface. As a PCI bus master theSYM53C875 supports burst data transfers on PCI up to the maximum rate of 132 MB/sec usingonchip buffers.The SCSI controller provides support for optional SCSI devices including internally mounted tapeand/or up to four internally mounted hard disk drives. No logic, termination, or resistor loads arerequired to connect devices to the SCSI controller other than termination at the end of the cable.The SCSI bus is terminated on the system board with active terminators that cannot be disabled.Network ControllerThe system board includes a 10BASE-T/100BASE-TX network controller based on the Intel 82558Fast Ethernet PCI Bus Controller. As a PCI bus master, the controller can burst data at up to132 MB/sec. The controller contains two receive and transmit FIFO buffers that prevent dataoverruns or underruns while waiting for access to the PCI bus. The controller has the following:n 32-bit PCI bus master interface (direct drive of bus), compatible with PCI Bus Specification,Revision 2.1n Chained memory structure with improved dynamic transmit chaining for enhancedperformancen Programmable transmit threshold for improved bus utilizationn Early receive interrupt for concurrent processing of receive datan On-chip counters for network managementn Autodetect and autoswitching for 10 or 100 Mbps network speeds