4-6 Hardware Functional Overview
System Core Logic
The system core logic function of the notebook is implemented on the CPU
module and motherboard using the Intel 440BX AGPset. This chipset consists
of the 82443BX System Controller found on the CPU module (430TX for
Tillamook) and the 82371EB PCI ISA IDE Xcelerator (PIIX4) mounted on the
motherboard. The 440BX supports both mobile and desktop architectures.
82443BX Features (for Pentium-II)
The Intel 82443BX Host Bridge provides a Host-to-PCI bridge, optimized
DRAM controller and data path, and an Accelerated Graphics Port (AGP)
interface. AGP is a high performance, component level interconnect targeted at
3D graphics applications and is based on a set of performance enhancements to
PCI.
The 82443BX functions and capabilities include:
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Processor/host bus support
Optimized for Pentium II processor at 66/100MHz system bus
frequency
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Integrated DRAM Controller
8 Mbytes to 512 Mbytes main memory
Supports up to 4 double-sided DIMMs
64-bit data interface with ECC support (SDRAM only)
Unbuffered and Registered SDRAM (Synchronous) DRAM Support
Enhanced SDRAM Open Page Architecture Support for 16- and 64-
Mbit DRAM devices with 2k, 4k, and 8k page sizes
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PCI Bus Interface
PCI Rev. 2.1, 3.3V and 5V, 33MHz interface compliant
PCI Parity Generation Support
Data streaming support from PCI to DRAM
Delayed Transaction support for PCI-DRAM Reads
Supports concurrent CPU, AGP and PCI transactions to main
memory
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AGP Interface
Supports single AGP compliant device (AGP-66/133 3.3V device)
AGP Specification Rev 1.0 compliant
