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AcerAltos 19000 User’s Guide
1-2
Advanced Peripheral Interrupt Controller (APIC)
The APIC unit inside the CPU, along with an I/O APIC unit, facilitates
multiprocessor interrupt management. The APIC works with multiple I/O
subsystems where each subsystem has its own interrupts which help minimize
centralized system overhead.
Bus Controller
The bus controller integrated in the Pentium Pro processor controls the system
bus, allowing it to efficiently perform its functions. It ensures the bus serves as a
reliable interconnection between one or two CPUs, I/O bridge, and memory
controllers.
Pentium Pro Processor Architecture
Bus Controller
APIC
256KB 4-way L2 Cache
8-KB 2-way
Data Cache
8-KB 4-way
Code Cache
CPU Core
Figure 1-1 Pentium Pro Processor Architecture