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Read from BIOS

Posted on 1998-03-29
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Last Modified: 2010-04-06
Hello
I need to read information from BIOS. How can I do it from Delphi 3. I am not good in Delphi programming. Please
give me a full sample code for this.
Thanks
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Question by:Alexey090397
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BoRiS earned 200 total points
ID: 1361034
You can try this... It will return the amount of extended mem from
the CMOS.

  Function MyGetExt: Integer; Assembler;
  asm
    Mov  AX,$3031;
    Out  $70,AL;
    NOP;
    IN   AL,$71;
    XCHG AH,AL;
    Out  $70,AL;
    NOP;
    IN   AL,$71;
  end;

Then as needed call the function....

I don't remeber the rest of the addresses etc. but I must warn you don't play around with the CMOS to much as certain function etc. can cause system crashes.

the port to read in is $71
and out is $70

Hope this helps...

Later

BoRiS
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Expert Comment

by:BoRiS
ID: 1361035
Alexey

Please grade this answer....

Thank you

BoRiS
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