System Overview 1-27BIOSThe BIOS and Setup Utility are located in the Flash EPROM on the CPU board andinclude support for system setup and legacy device configuration. A number of security,reliability, and management features also have been incorporated to meet vital serverneeds.USB/IDE ControllerThe ServerWorks ROSB chip supports the USB and IDE controllers. The I/O panelboard provides the connector interface for two USB ports that support thekeyboard/mouse and floppy diskette drive.The system includes a single channel enhanced IDE 32 bit interface. The IDE controllerprovides support for the internally mounted CD-ROM.The device controls:! PIO and DMA transfer modes! Mode 4 timings! Transfer rates up to 33 MB/s! Buffering for PCI/IDE burst transfers.Network ControllersEach PCI CRU includes a 10BASE-T/100BASE network controller and a 10BASE-T/100BASE-TX/1000BASE-T network controller. As a PCI bus master, the controllercan burst data at up to 132 MB/sec. The controller contains two receive and transmitFIFO buffers that prevent data overruns or underruns while waiting for access to thePCI bus. The controller has the following:! 32-bit PCI bus master interface for 10BASE-T/100BASE and a 64-bit PCI busmaster interface for a 10BASE-T/100BASE-TX/1000BASE, compatible withPCI Bus Specification, Revision 2.1! Chained memory structure with improved dynamic transmit chaining forenhanced performance! Programmable transmit threshold for improved bus utilization! Early receive interrupt for concurrent processing of receive data! On-chip counters for network management! Autodetect and autoswitching for 10 or 100 Mbps network speeds! Support for both 10 Mbps, 100 Mbps and 1000Mbps networks, capable of full orhalf duplex, with back-to-back transmit at 100 Mbps! Support for Wake On LAN.
