Datasheet

Register Description
R
52 Intel
®
82845 MCH for DDR Datasheet
3.5.14 AGPM—AGP Miscellaneous Configuration Register
(Device 0)
Address Offset: 51h
Default Value: 00h
Access: R/W
Size: 8 bits
Bit Descriptions
7:2 Reserved.
1 Aperture Access Global Enable (APEN). This bit is used to prevent access to the graphics
aperture from any port (processor, hub interface, or AGP/PCI_B) before the aperture range is
established by the configuration software and the appropriate translation table in system
memory has been initialized. The default value is 0; thus, this field must be set after system is
fully configured to enable aperture accesses.
0 Reserved.