NEC Express5800/120Ra-1 User's Guide Page 24

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1-10 System Overview
Keyboard and Mouse Controller
The keyboard and mouse controller is PS/2 compatible.
Network Controller
The system board includes dual 10BASE-T/100BASE-TX network controllers based on
the Intel 82559 Fast Ethernet PCI Bus Controller. As a PCI bus master, the controllers
can burst data at up to 132 MB/sec. Each controller contains two receive and transmit
FIFO buffers that prevent data overruns or underruns while waiting for access to the
PCI bus. Each 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 controller provides dual Ultra-160/M SCSI interfaces as two
independent PCI functions. Interface A supports two Ultra-160/M SCA hard disk drives
in the system. Interface B may be used to support external SCSI devices attached to the
system, utilizing the SCSI connector located on the rear panel.
Video Controller
The system has an integrated ATI Rage XL 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 1224 X 768
!
Analog VGA monitors (single and multiple frequency, interlaced and
noninterlaced) with a maximum vertical retrace noninterlaced frequency of
100 Hz.
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