Google Answers: Finding the pyhsical address of screen memory an a IA32 systems.

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Q: Finding the pyhsical address of screen memory an a IA32 systems. ( No Answer, 0 Comments )

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Subject: Finding the pyhsical address of screen memory an a IA32 systems.
Category: Computers > Operating Systems
Asked by: mdornseif-ga
List Price: $9.50

Posted: 03 Sep 2004 22:27 PDT
Expires: 03 Oct 2004 22:27 PDT
Question ID: 396714

In traditional DOS screen memory was located around 0xb800. Modern
PCI/AGP graphics adapters usually have their screen memory located
somewhere in the last third of the 4 GB address space.

I need to write a program for FreeBSD or MS Windows 2000 which outputs
the physical address (as opposed to the logical address in a
specific processes address space) of the screen page actually
displayed. Which APIs/programming constructs can I use to get this
information?

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