Scsi Controller; Video Controller; Peripheral Controller; Serial Ports - NEC EXPRESS5800/120Ed User Manual

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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.

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 10ns onboard Synchronous Graphics Memory (SGRAM)

Pixel resolutions up to 1280 X 1024

Analog VGA monitors (single and multiple frequency, interlaced and non-

interlaced) with a maximum vertical retrace non-interlaced frequency of

100 Hz.

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.

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.

One IEEE 1284-compatible 25-pin bi-directional 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.

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.

1-10 System Overview

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