About Pci Cards And Buses - Sun Microsystems Fire V890 Service Manual

About PCI Cards and Buses

All system communication with storage peripherals and network interface devices is
mediated by two Peripheral Component Interconnect (PCI) bridge chips, located on
the system's motherboard. Each bridge chip manages communication between the
system's main interconnect bus and two PCI buses, giving the system a total of four
separate PCI buses. The four PCI buses support up to nine PCI interface cards and
four motherboard devices.
The following table describes the PCI bus characteristics and maps each bus to its
associated bridge chip, motherboard devices, and PCI slots. All slots comply with
PCI Local Bus Specification Revision 2.1.
Clock Rate (MHz)/
Bandwidth (bits)/
PCI Bridge PCI Bus Voltage (V)
0 PCI A 66 MHz/
64 bits/
3.3V
0 PCI B 33 MHz/
64 bits/
5V
1 PCI C 33 or 66 MHz/
64 bits/
3.3V
1 PCI D 33 MHz/
64 bits/
5V
The system's PCI hot-plug feature allows you to remove and install PCI cards while
the system is running. You can hot-plug any standard PCI card, provided that its
Solaris device drivers support PCI hot-plug operations, and the system is running a
Solaris Operating System that supports Sun Fire V890 PCI hot-plug operations.
In addition, the PCI card must comply with the PCI Hot-Plug Specification
Revision 1.1.
PCI hot-plug procedures may involve software commands for preparing the system
prior to removing a card and for reconfiguring the operating system after installing
a PCI card. For more information about PCI hot-plug procedures, see
Pluggable and Hot-Swappable Components" on page
Motherboard Devices
Gigabit Ethernet controller
FC-AL controller
SCSI controller (interface to the
internal IDE DVD-ROM drive)
None
System controller card, RIO
ASIC (Ethernet, USB, and EBus
interfaces)
6.
Chapter 7 Hardware Configuration
PCI Slots
None. Used
for integrated
controllers
only
Slots 0, 1, 2, 3
Slots 7 and 8
Slots 4, 5, 6
"About Hot-
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