Real-Time Clock/Calendar; Bios; Ide Controller - NEC EXPRESS5800/120Rc-2 Service Manual

PCI 3
PCI 2
PCI 1

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 Legacy device configuration. A number of
security, reliability, and management features also have been incorporated to meet vital
server needs.

IDE Controller

The system includes a single channel enhanced IDE 32 bit interface controller for
intelligent disk drives with disk controller electronics onboard. The controller has a
connector located on the system board that supports a master and a slave device. The
IDE controller provides support for the internally mounted CD-ROM.
The device controls:
PIO and DMA transfer modes
!
Mode 4 timings
!
Transfer rates up to 33 MB/s
!
Buffering for PCI/IDE burst transfers
!
Master/slave IDE mode
!
Up to two devices.
!
A
A 64 Bit/33 MHz/5V PCI Connector Slots
B PCI I/O Riser Board
C 32 Bit/33 MHz/5V PCI Connector Slots
Figure 1-4. I/O Board PCI Connector Slots
B
C
PCI 4
System Overview 1-9