Datasheet

Overview
R
Datasheet 19
Term Description
System Bus Processor-to-GMCH interface. The Enhanced mode of the Scalable bus is the P6
Bus plus enhancements, consisting of source synchronous transfers for address
and data, and system bus interrupt delivery. The Mobile Intel Pentium 4 processor
and Intel Celeron processor implement a subset of Enhanced mode.
UMA Unified Memory Architecture with graphics memory for the IGD inside System
Memory
VDL Video Data Link
Primary PCI Physical PCI bus that is driven directly by the component. It supports 3.3 V, 33
MHz PCI or PCI0 2.2 compliant components. Communication between PCI0 and
the GMCH occurs over the hub interface. Note that although the Primary PCI bus
is referred to as PCI0, it is not PCI Bus #0 from a configuration standpoint.
AGP Accelerated Graphics Port. Refers to the AGP/PCI interface that is in the GMCH. It
supports a 1.5 V, 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.
AGP/PCI1 The physical bus that is driven directly by the AGP/PCI1 Bridge (Device #1) in the
GMCH. This is the primary AGP bus.
GART Graphics Aperture Re-map Table. This table contains the page re-map information
used during AGP aperture address translations.
GTLB Graphics Translation Look-aside Buffer. A cache used to store frequently used
GART entries.
1.2 Reference Documents
Document Document
No./Location
Mobile Intel
®
Pentium
®
4 Processor-M Datasheet
(250686)
http://www.intel.com/design/mobile/datashts/250686.
htm
Mobile Intel
®
Celeron
®
Processor on .13 Micron
Process and in Micro-FCPGA Package (251308)
http://www.intel.com/design/mobile/datashts/251308.
htm
Intel
®
Celeron
®
M Processor Datasheet(300302) http://www.intel.com/design/mobile/datashts/300302.
htm
Intel
®
Celeron
®
D Processors 345, 340, 335, 330,
325, and 320
∆
Datasheet
http://www.intel.com/design/celeron/datashts/302353.
htm
PCI Local Bus Specification 2.2 www.pcisig.com
Intel
®
82801DBM I/O Controller Hub 4 Mobile
(ICH4-M) Datasheet (252337)
http://developer.intel.com/design/mobile/datashts/252
337.htm