NEC Express5800/120Rc-2, Руководство по обслуживанию, Страница: 24 / 194

1-10 System Overview
Keyboard and Mouse Controller
The keyboard and mouse controller is PS/2 compatible.
Network Controller
The system board includes a 10BASE-T/100BASE-TX network controller based on the
Intel 82559 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.
!
Support for Wake On LAN.
SCSI Controller
The system board includes an embedded Adaptec AIC7899 dual function SCSI
controller. The AIC7899 provides Ultra-160/M and Wide Ultra SCSI interfaces as two
independent PCI functions. As implemented on the system board, interface A attaches
to an Ultra-160/M SCSI backplane that supports up to six Ultra-160/M SCA drives.
Controller B, the Wide Ultra SCSI interface, may be used to support SCSI devices in
the removable media bays.
Video Controller
The system has an integrated ATI Rage IIC 64 bit high-performance SVGA subsystem
that supports the following:
!
BIOS compatibility with VGA, EGA, CGA, Hercules Graphics, and MDA
!
4 MB of 10 ns onboard Synchronous Graphics Memory (SGRAM)
!
Pixel resolutions up to 1280 X 1024
!
Analog VGA monitors (single and multiple frequency, interlaced and
noninterlaced) with a maximum vertical retrace noninterlaced frequency of
100 Hz.