NEC ES1400, User Manual, Page: 23 / 188

System Overview 1-9
The SCSI controller provides support for optional SCSI devices
including internally mounted tape and/or up to four internally mounted
hard disk drives. No logic, termination, or resistor loads are required 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 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:
„
32-bit PCI bus master interface (direct drive of bus), compatible with
PCI Bus Specification, Revision 2.1
„
Chained memory structure with improved dynamic transmit chaining
for enhanced performance
„
Programmable transmit threshold for improved bus utilization
„
Early receive interrupt for concurrent processing of receive data
„
On-chip counters for network management
„
Autodetect and autoswitching for 10 or 100 Mbps network speeds
„
Support 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:
„
Transmit/receive activity on the LAN
„
Valid link to the LAN
„
10/100 Mbps transfer mode.