NEC Express5800 120Ld, User Manual

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System Overview 1-13
SCSI Controller
The system board includes an embedded Adaptec AIC7899 dual function SCSI
controller. The AIC7899 provides Ultra-160/M and Wide Ultra2 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 2 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.
Peripheral Controller
The advanced integrated peripheral controller supports two serial ports, two universal
serial ports, one parallel port, diskette drive, PS/2-compatible keyboard and mouse, and
integrated Real Time Clock (RTC). The system
provides the connector interface for
each port.
Serial Ports
Both serial ports are relocatable. Each serial port can be set to one of four different
addresses and can be enabled separately. When disabled, serial port interrupts are
available to add-in boards.
Parallel Port
One IEEE 1284-compatible 25-pin bidirectional EPP (supporting levels 1.7 and 1.9)
parallel port is provided. BIOS programming enables the parallel port and determines
the port address and interrupt. ECP mode is supported with 2 possible DMA channels.
When disabled, the interrupt is available to add-in boards.
External Device Connectors
The external I/O connectors provide support for a PS/2 compatible mouse and a
keyboard, for a SVGA monitor, 2 serial port connectors, a parallel port connector, LAN
port, and two USB connections for devices other than keyboard or mouse.