NEC LC1400 manual Real-Time Clock/Calendar, IDE Controller, Network Controller

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 CD-ROM and an optional tape device.

Network Controller

The system board includes a 10BASE-T/100BASE-TX network controller based on the Intel 82558 Fast Ethernet PCI Bus Controller. As a PCI bus master, the controller can burst data at up to 132 MB/sec. The controller contains two receive and transmit FIFO buffers that prevent data overruns or underruns while waiting for access to the PCI bus. The controller has the following:

n32-bit PCI bus master interface (direct drive of bus), compatible with PCI Bus Specification, Revision 2.1

nChained memory structure with improved dynamic transmit chaining for enhanced performance

nProgrammable transmit threshold for improved bus utilization

nEarly receive interrupt for concurrent processing of receive data

nOn-chip counters for network management

nAutodetect and autoswitching for 10 or 100 Mbps network speeds

nSupport for both 10 Mbps and 100 Mbps networks, capable of full or half duplex, with back-to-back transmit at 100 Mbps.

The network status LEDs on the system board indicate:

nTransmit/receive activity on the LAN

nValid link to the LAN

n10/100 Mbps transfer mode.

System Overview 1-11