915GM Datasheet, PDF (30/48 Pages) Intel Corporation – 915GM/PM/GME/GMS and 910GML/GMLE Express Chipset

Specification Clarifications
Specification Clarifications
1.
Slow DMA Transfers for LPC Devices
8-bit DMA transfers to some LPC devices, may incur latencies, that result in a slowed
down transfer rate. Longer latencies may occur when the platform becomes idle and
the GMCH dynamically asserts HCPUSLP# for Processor C2 states.
For example, a 4-Mbps FIR device may transmit faster than the resulting 8-bit DMA
transfer rate resulting in data retransmission and lower FIR throughput.
So as not to impede the transfer rate of certain LPC Devices, the dynamic assertion of
HCPUSLP# by GMCH during Processor C2 states can be disabled. Contact your Intel
field representative for more details on how to disable HCPUSLP# assertion during C2
states.
2.
Dynamic Video Memory Technology (DVMT) 3.0 Support
Configurations
The following note should be added to Section 1.1 of the Mobile Intel® 915 and 910
Express Chipset Family of Products Datasheet:
Please contact your local Intel field representative for additional information regarding
DVMT 3.0 support configurations.
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Specification Update