NEC ES1400, Руководство пользователя, Страница: 22 / 188

1-8 System Overview
The system board has four full-length PCI connectors. One of the
connectors shares a chassis expansion slot with an ISA connector. PCI
features:
„
Bus speed up to 33 MHz
„
32-bit memory addressing
„
5 V signaling environment
„
Burst transfers of up to 133 Mbps
„
8-, 16-, or 32-bit data transfers
„
Plug and Play ready
„
Parity enabled.
Real-Time Clock/Calendar
The 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.
BIOS
A BIOS and Setup Utility are located in the Flash EPROM on the system
board and include support for 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 Controller
The system includes a dual channel enhanced IDE interface controller.
The controller has a primary and secondary connector located on the
system board, each connector supporting a master and 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 IDE devices.
SCSI Controller
The system includes a Symbios Logic SYM53C875 single channel PCI
SCSI controller. The controller is capable of operations using either 8 or
16 bit SCSI providing 10 MB/s (Fast-10) or 20 MB/s (Fast-20)
throughput, or 20 MB/s (Ultra) or 40 MB/s (Ultra-wide). As
implemented, the controller attaches to a 68 pin 16 bit (wide) SCSI
connector interface. As a PCI bus master the SYM53C875 supports
burst data transfers on PCI up to the maximum rate of 132 MB/sec
using onchip buffers.