Introduction
The Intel® 82845 Memory Controller Hub (MCH) is designed for use with the Intel® Pentium® 4 processor in the 478-pin package. The Intel® 845 chipset contains two main components: the 82845 Memory Controller Hub (MCH) for the host bridge and the Intel 82801BA I/O Controller Hub (ICH2) for the I/O subsystem. The MCH provides the processor interface, system memory interface, AGP interface, and hub interface in an 845 chipset desktop platform.

This document describes the 82845 Memory Controller Hub (MCH) for use with SDR (Single Data Rate) memory devices. Section 1.3 provides an overview of the 845 chipset.