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Reading address F000:FFF0 (BIOS Date) From VC Console Application

Posted on 2006-06-18
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Last Modified: 2008-02-01
Dear Masters

Please guide me to know how i can Read address F000:FFF0 (BIOS Date) From VC Console Application, I want read this address and addresses like this, i don't want to get BIOS date throuhgh reading registery keys , i just want to read this area of memory, please guide me.

Thank you in advance for your information

Sincerely Yours
==========
Milad
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Question by:miladyyy
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jhance earned 200 total points
ID: 16929309
Can't do it, at least not directly.  VC (I assume you mean Visual C++ here) creates WIN32 applications, regardless of whether it's a CONSOLE app or a GUI/windowed app.  

WIN32 provides NO ACCESS to physical memory addresses by an application.  Any address you read in a WIN32 app is a VIRTUAL address, not a physical address.

The only way to read a physical address is from KERNEL MODE which means you must use a DEVICE DRIVER.

Why do you want to do this anyway?  The proper way to get or set the date is to use the WIN32 APIs provided for that purpose.  They are:

void GetLocalTime(
  LPSYSTEMTIME lpSystemTime
);


BOOL SetLocalTime(
  const SYSTEMTIME* lpSystemTime
);


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by:jhance
ID: 16929318
If you really want to do this, however, you can get the Windows DDK from Microsoft and build a simple real memory access device driver and then install that driver.  Then you can communicate with it from your VC WIN32 application through the CreateFile() and DeviceIoControl() APIs.

Perhaps it would help if you explained what you are trying to do anyway.  There may be a way of doing it without having to go through all the trouble of writing and installing a driver.
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