82830MP Datasheet, PDF (94/159 Pages) Intel Corporation – Intel 830MP Chipset: 82830MP Graphics and Memory Controller Hub (GMCH-M)

Intel® 830MP Chipset
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Note:
controller will reside) and PMBASE and PMLIMIT are used to map prefetchable address ranges
(typically graphics memory). This segregation allows application of USWC space attribute to be
performed in a true plug-and-play manner to the prefetchable address range for improved CPU-AGP
memory access performance.
Configuration software is responsible for programming all address range registers (prefetchable, non-
prefetchable) with the values that provide exclusive address ranges i.e. prevent overlap with each other
and/or with the ranges covered with the main memory. There is no provision in the GMCH-M hardware
to enforce prevention of overlap and operations of the system in the case of overlap are not guaranteed.
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Datasheet
298338-001