Intel 815 manual Frame Buffer Access

Models: 815

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Intel® 815 Chipset: Graphics Controller PRM, Rev 1.0

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8.Frame Buffer Access

The VGA frame buffer is located at A000h-BFFFh. This is the standard VGA frame buffer address.

The physical location of the frame buffer is at the top of main memory. The size can either be 512 KB or 1 MB. This is selected in the SMRAM register, which is documented in the Initialization Registers section of this document.

The frame buffer is not stored in local memory, but it is taken from the top of main memory, as described in the SMRAM register description.

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Page 77
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Intel 815 manual Frame Buffer Access