Computer Hardware User Manual

20 SKA4 Baseboard Product Guide
USB Interface
The SKA4 baseboard provides a dual external USB connector for the back panel of a server
system. The connector is defined by the USB Specification, Revision 1.0. Both ports function
identically with the same bandwidth. The SKA4 baseboard also provides a proprietary internal
USB header.
Network Interface Controller (NIC)
The SKA4 baseboard supports a 10BASE-T/100BASE-TX network subsystem based on the
Intel
®
82559 Fast Ethernet Multifunction PCI/CARDBus controller. The Intel 82559 controller is
a highly integrated PCI LAN controller in a 196-pin Ball Grid Array (BGA) supporting 10 or
100 Mbps fast Ethernet networks.
Supported network features include:
Glueless 32-bit PCI Bus Master Interface compatible with the PCI Local bus Specification
82596-like chained memory structure with improved dynamic transmit chaining for enhanced
performance
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 SKA4 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 SKA4 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.