82845PE Datasheet, PDF (55/176 Pages) Intel Corporation – 82845GE Graphics and Memory Controller Hub (GMCH) and 82845PE Memory Controller Hub (MCH)

Register Description
3.5.1.14
AGPM—AGP Miscellaneous Configuration Register (Device 0)
Address Offset:
Default Value:
Access:
Size:
51h
00h
R/W
8 bits
Bit
Description
7:2 Reserved.
Aperture Access Global Enable (APEN). This bit is used to prevent access to the graphics
aperture from any port (CPU, HI, or AGP/PCI_B) before the aperture range is established by the
configuration software and the appropriate translation table in the main SDRAM has been initialized.
1
0 = Disable. (Default). This field must be set after the system is fully configured in order to enable
aperture accesses.
1 = Enable.
0 Reserved.
Intel^® 82845GE/82845PE Datasheet
55