NEC MC2200, Руководство пользователя

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1-10 System Overview
IDE Controller
The system includes an IDE interface controller on the system board (Figure 1-5, I)
supporting a master and slave device. This provides support for optional tape devices.
SCSI Controller
The system includes two onboard SCSI controllers, providing both ultra wide (Figure 2-
3, J) and fast narrow (Figure 1-5, K) SCSI support.
The fast/narrow SCSI-2 controller (Adaptec® AIC-7860) supports data paths of 8-bit
(fast/narrow SCSI) at a data transfer rate of 10 MB/sec and the ultra wide SCSI-2
controller (Adaptec® AIC-7880) supports data paths of 16-bit (fast/wide or ultra /wide
SCSI) at a data transfer rate of 20 MB/sec or 40 MB/sec. On the PCI bus, these
controllers support burst data transfer rates up to the maximum of 133 MB/sec. On this
server, the ultra wide controller is cabled to the Ultra-2 SCSI backplane that supports up
to seven Ultra-2 SCA drives. The fast narrow controller is cabled to the internally
mounted CD-ROM drive and can also be cabled to the optional SCSI devices in the
5 1/4-inch removable media drive bays.
Video Controller
The system has a high-performance SVGA subsystem that supports the following:
„
BIOS compatibility with VGA, EGA, CGA, Hercules Graphics, and MDA
„
2 MB of Video Random Access Memory (VRAM) video buffer
„
16-bit bus for high-speed display memory access
„
Hardware accelerated bit block transfers (BITBLT)
„
Display power management system
„
Supports 72Hz refresh, non-interlaced at: 640x480, 800x600, 1024x768, or
1280x1024 resolutions
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Displays of up to 16M colors at 640x480 and 800x600 resolutions, 64K colors at
1024x768 resolutions and 256 colors at 1280x1024 resolutions.
Peripheral Controller
The advanced integrated peripheral controller supports two 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
COM ports and can be enabled separately. When disabled, serial port interrupts are
available to add-in boards.