Datasheet

Intel

82845G/82845GL/82845GV GMCH Datasheet 57

3.5.1.14 AGPM—AGP Miscellaneous Configuration Register (Device 0)

Address Offset: 51h

Default Value: 00h

Access: R/W

Size: 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.

0 = Disable. (Default). This field must be set after the system is fully configured in order to enable

aperture accesses.

1 = Enable.

0 Reserved.