Accelerated Graphics Port Interface Specification

AGP3.0 Interface Specification
Rev. 1.0
132
Bits Access Field Description
2:0 R-W-D’000 DRATE
Data Rate Enable (DRATE) - The setting of these bits
determines the data transfer rate. One (and only one) bit
in this field must be set to indicate the desired data
transfer rate. The same bit must be set on both master
and target. The encoding below assumes AGP3.0_Mode
is set in AGPSTAT
Encoding Meaning
001 4X Data Transfer Mode
010 8X Data Transfer Mode
100 Reserved