Scsi/Lan Combination Board; Pci Interface - HP X Class 500/550MHz Reference Manual

SCSI/LAN Combination Board

HP V Personal Workstations are supplied with an integrated SCSI / 10BT/100TX
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LAN combination (combo)board which is installed in PCI Slot 4. Even though the
SCSI/LAN combo board includes two controllers, only one PCI slot is necessary for
installation.
The LAN and SCSI controllers access the PCI bus through a PCI-to-PCI bridge. The SCSI
and PCI functions are contained within the Symbios Logic SYM53C875JE PCI-SCSI I/O
Processor chip.
Do not connect any devices to the Internal Narrow SCSI connector, and to the Internal
Wide SCSI connector at the same time. If you do, this results in a badly "terminated" SCSI
bus. In the HP V
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provided. The following diagram shows the SCSI/LAN Combo board connectors.
Figure 3-4. SCSI/LAN Combo Board Connectors
LAN Controller
Optional Boot Rom
Socket (option)
External Wide SCSI
connector (J7).
LED which indicates
LAN link

PCI Interface

The PCI interface operates as a 32-bit DMA bus master. The connection is made through
the edge connector. The signal definitions and pin numbers conform to the PCI Local Bus
Specification Revision 2.1 standard. The PCI interface conforms to the PCI universal
signaling environment for a 5 volt PCI bus.
Chapter 3
Personal Workstations, only an Internal Narrow SCSI cable is
Thirteen-pin connector
(J4) to connect the
ExtStart cable to the
RJ-45 connector.
Interface Boards and Mass-Storage
SCSI/LAN Combination Board
Three-pin connector
(J8) to connect the
Internal Wide SCSI
WOL cable to the
connector (J3 - not
Internal Narrow SCSI
connector (J9 - used).
Flash memory (128 KB)
Symbios Logic
(53C875JE)
PCI-to-PCI Bridge
PCI connector.
Refer to the section "System Board Overview" in
Chapter 2 to find out where the HP ExtStart and
WOL connectors are located on the system board.
Drivers
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