Compaq Deskpro 4000 - 3.2 PENTIUM II-BASED PROCESSOR;MEMORY SUBSYSTEM

Chapter 3 Processor/Memory Subsystem
Compaq Deskpro 4000 and 6000 Personal Computers
featuring the Pentium II Processor
First Edition - October 1997
3-2
64-Bit Mem.
Data Bus
Mem. Addr.
3.2 PENTIUM II-BASED PROCESSOR/MEMORY SUBSYSTEM
The processor/memory subsystem in Pentium II-based systems features an Intel Pentium II
processor, an 82440LX system controller, and either 32 or 64 megabytes of system memory
(Figure 3-1).
Figure 3–1.
Pentium II-Based Processor/Memory Subsystem Architecture
The Pentium II SEC cartridge is mounted in a special processor slot that facilitates easy
changing/upgrading. The 440LX controller provides the Host/PCI bridge functions and controls
data transfers with system memory over the 64-bit memory data bus. The system memory comes
with 32 or 64 megabytes of SDRAM expandable to 384 megabytes.
Pentium II
Processor
32-Bit PCI Bus
Optional module
32-MB
DIMM
DIMM
J12
J11
System Memory
64-Bit Host Bus
PCI
Controller
(440LX)
Cntl
DIMM
J10