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3 System Board (P/Ns D3657-63001 and D3661-63001)
Principal Components and Features
Principal Components and Features
PCI Chipset
The PCI chipset consists of four chips that interface between the three main
buses (the processor's local (PL) bus, the PCI bus, and the ISA bus):
• The PL/PCI bridge chip (SB82437FX-66) which also provides control for
• Two data path unit chips (SB82438FX) that provide a 64-bit data path
• The PCI/ISA bridge chip (SB82371FB) also provides control for the IDE.
Host Bus
Pentium
Processor
62
the PCI bus, level-2 cache memory, and main memory.
between the processor local bus and main memory modules.
SB82438FX
Data Path Unit
SB82438FX
Data Path Unit
Memory
Level-Two
Cache
SB82437FX-66 PCI, Cache
and Memory Controller
Cache
Main
Controller
Memory
Controller
Write
Buffer
PCI
PCI
Master
Slave
PCI Bus
Main
SB82371FB
PCI/ISA Bridge
PCI
Master
ISA Bus
Controller
PCI
Slave
IDE
APIC
Controller
BIOS
ISA Bus
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