HP XU800 - Manual (Page 44)

44
2 System Board
PCI 64-bit Hub
PCI 64-bit Hub
The P64H is a peripheral chip that performs PCI bridging functions
between the MCH and the PCI 64-bit 66 MHz bus. The P64H has a 16-bit
primary hub interface to the MCH and a secondary 64-bit PCI bus
interface. This controller inter-operates transparently with either 64-bit or
32-bit devices.
The following figure shows how the P64H chip is connected to the MCH via
the Hub Link 16 and to the supported devices such as those in the two PCI
64-bit 66 MHz PCI slots and AIC-7892 Ultra 160 SCSI controller via the PCI
64-bit 66 MHz bus.
I840 Memory
Controller Hub (MCH)
82840-QP
PCI Bus (64-bit, 66 MHz)
533 MB/s data transfer rate
Address (36)
Control
Data (64)
Intel Pentium III
Processor
(optional second processor)
with L2 cache memory SECC-2 cartridge
Host (also called FSB)
two-way Bus 100/
133 MHz, 1 GB/sec
data transfer rate)
(533 MB/s data
transfer rate)
P64H
Onboard AIC7892
SCSI U160
Controller
HUB
LINK 16
Slot 4 - 64-bit/66 MHz
Slot 3 - 64-bit/66 MHz
Intel Pentium III
Processor
with L2 cache memory
SECC-2 cartridge
PCI
Interface