1-30 Technical Information
NETWORK BOARDS
Systems might come with one of several network boards in an expansion slot. Depending
on the type of board and its connectors and capabilities, the system can be connected to
another computer, to a LAN, or to the Internet. The system might be connected via a
3COM network board:
thin Ethernet cable and onboard transceiver using a BNC connector
(3COM 3C509B)
twisted-pair cable and onboard transceiver using an RJ-45 connector
(3COM 3C905-TX and 3COM 3C509B)
thicknet cable with an external transceiver using an AUI (DB15) connector
(3COM 3C509B).
Specifications for network boards are given in Table 1-33 and Table 1-34.
SCSI ADAPTER BOARD
Systems that ship with an Ultra Wide SCSI hard disk drive come with an Adaptec 2940
SCSI adapter board installed in a PCI expansion slot. The SCSI adapter board brings the
highest performance SCSI I/O technology to the PCI local bus, transferring data up to
133 MB/second. The SCSI adapter board is compatible with all major operating systems,
including SCSI-1, SCSI-2 and SCSI-3 peripherals, and industry-standard application
software.
The BIOS-resident SCSISelect configuration utility eliminates the need to handle jumpers
or terminators while adding peripherals. All configuration and terminator settings are
controlled via the keyboard (see “SCSISelect Utility” in Section 2). The SCSI adapter
board includes the following features:
PCI to UltraSCSI host adapter with SCSISelect, using the PCI local-bus to
support up to fifteen SCSI devices
Bus master DMA interface protocol
32-bit bus width
up to 133 MB/second host bus burst data rate
Fast and Wide 40 MB/second SCSI synchronous data rate
3.3 MB/second SCSI asynchronous data rate
SCSI-1, SCSI-2, SCSI-3, and Wide UltraSCSI device protocol
advanced SCSI features including multi-threaded I/O (up to 255 tasks
simultaneously), scatter/gather, tagged command queuing, disconnect/reconnect,
and synchronous and asynchronous data transfer
extended translation scheme supports up to eight GB per disk
