NEC HX4500 manual Video, Scsi Controller, Peripheral Controller, External Device Connectors

Video

The onboard super VGA controller (PCI) is a high-performance SVGA subsystem that supports:

BIOS compatibility with VGA, EGA, CGA, Hercules Graphics, and

MDA

1 MB of Video Memory expandable to 2 MB (Figure 1-6, F)

16-bit bus for high-speed display memory access

hardware accelerated bit block transfers (BITBLT)

72Hz refresh, non-interlaced at: 640x480, 800x600, or 1280x1024

Tresolutions

up to 16M colors at 640x480 and 800x600 resolutions, 64K colors at 1024x768 resolutions and 256 colors at 1280x1024 resolutions with the optional 2 MB video memory.

Note: SVGA drivers may be required to use the high- performance video modes.

SCSI Controller

The system I/O board includes a dual Ultra2 wide SCSI-2 controller (Adaptec® AIC-7895) integrated as a PCI bus master. This controller supports data paths of 8-bit (fast/narrow SCSI) at a data transfer rate of 10 MB/sec and 16-bit (fast/wide or ultra /wide SCSI) at a data transfer rate of 20 MB/sec or 40 MB/sec. As a PCI bus master, this controller supports burst data transfer rates up to the maximum of 133 MB/sec.

On this server, channel B is cabled to the four SCSI devices in the removable media drive bays. Channel A is available for optional SCSI devices.

Peripheral Controller

The advanced integrated peripheral controller supports two serial ports and one parallel port through the I/O riser board (see Figure 1-6, G). The advanced integrated peripheral controller also supports the connection of two diskette drives (see Figure 1-6, P).

External Device Connectors

The I/O panel provides connectors for a PS/2 compatible mouse and a keyboard, connectors for VGA monitor, two serial port connectors, and a parallel port connector. It also provides a narrow SCSI external connector.

Keyboard and Mouse

The keyboard/mouse controller is PS/2-compatible.

System Overview 1-17