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System Overview 1-17
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
resolutions
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.