User`s guide

26 007-4274-001
2: Baseboard Description
• Programmable transmit threshold for improved bus utilization
• Early receive interrupt for concurrent processing of receive data
• On-chip counters for network management
• Auto-detect and auto-switching for 10 or 100 Mbps network speeds
• Support for both 10 and 100 Mbps networks
• Integrated physical interface to TX magnetics
• The magnetics component terminates the 100BASE-TX connector interface and a
flash device stores the network ID
Video
The baseboard provides an ATI Rage IIc VGA Graphics Accelerator, along with video
Synchronous Graphics RAM (SGRAM) and support circuitry for an embedded Super
VGA (SVGA) video subsystem. The ATI Rage IIc chip contains an SVGA video controller,
clock generator, BitBLT engine, and a RAM digital-to-analog Converter (RAMDAC) in a
208-pin PQFP. One 256K x 32 SGRAM chip provides 2 MB of 10-ns video memory. The
baseboard does not support adding video memory to the system. The SVGA subsystem
supports a variety of modes, up to 1600 x 1200 resolution, or up to 16.7 M colors.
The SVGA subsystem also supports analog VGA monitors, single- and multi-frequency,
interlaced and non-interlaced, up to 100 Hz vertical retrace frequency. The baseboard
provides a standard 15-pin VGA connector and video blanking logic for server
management console redirection support.
Depending on the environment, the controller displays up to 16.7 M colors in some video
resolutions.
SCSI Controller
The baseboard includes two SCSI controllers. A dual function SCSI controller (Adaptec
AIC-7899) is on the PCI-B bus, and a PCI wide SCSI controller (Adaptec AIC-7880) is on
the PCI-C bus.