82830MP Datasheet, PDF (15/159 Pages) Intel Corporation – Intel 830MP Chipset: 82830MP Graphics and Memory Controller Hub (GMCH-M)

Intel^® 830MP Chipset
R
2.1
Terminology
GMCH3-MP
(GMCH-M)
82801CAM I/O
Controller Hub
(ICH3-M)
Hub Interface
AGP
AGP/PCI1
Primary PCI
Secondary PCI
The Intel 830MP Graphics and Memory Controller Hub-Mobile component that contains the
CPU interface, system SDRAM controller, and AGP interface. It communicates with the
ICH3-M over a proprietary interconnect called the hub interface.
The ICH3-M is connected to the GMCH-M through a proprietary interconnect called the hub
interface. This is the I/O Controller Hub or ICH component that contains the primary PCI
interface, LPC interface, USB1.1, ATA-100 and other IO functions.
The proprietary interconnect between the GMCH-M and the ICH3-M. In this document hub
interface cycles originating from or destined for the ICH3-M are generally referred to as hub
interface cycles. Hub cycles originating from or destined for the primary PCI interface on the
ICH3-M are sometimes referred to as Hub Interface/PCI cycles.
Accelerated Graphics Port. Refers to the AGP/PCI interface that is in the GMCH-M. It
supports a 1.5V 66/266 MHz component. PIPE# and SBA cycles are generally referred to as
AGP transactions. FRAME# cycles are generally referred to as AGP/PCI transactions.
The physical bus that is driven directly by the AGP/PCI1 Bridge (Device #1) in the GMCH-M.
This is the primary AGP bus.
The primary physical PCI (PCI0) bus that is driven directly by the ICH3-M component. It
supports a 3.3V interface and is 5.0V tolerant, 33 MHz PCI 2.2 compliant components.
Interaction between PCI0 and GMCH-M occurs over the hub interface. Note that even
though the Primary PCI bus is referred to as PCI0 it is not PCI Bus #0 from a configuration
standpoint.
The secondary physical PCI (PCI1) interface that is a subset of the AGP bus driven directly
by the GMCH-M. It supports a subset of 1.5V, 66 MHz PCI 2.2 compliant components. Note
that even though the Secondary PCI bus is referred to as PCI1 it may not be configured as
PCI Bus #1.
298338-001
Datasheet
15