Andrew,<div><br></div><div>Would happen to know which linux driver handles this interrupt?</div><div><br></div><div>Also, do you know where is this &quot;correct handshake&quot; described? It seems</div><div>that once bit 1 is set it can only be cleared by the reset.</div>
<div>----</div><div>rich<br><br><div class="gmail_quote">On Sat, Feb 9, 2013 at 5:34 PM, Andrew Goodbody <span dir="ltr">&lt;<a href="mailto:ajg4tadpole@gmail.com" target="_blank">ajg4tadpole@gmail.com</a>&gt;</span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">On 08/02/13 23:47, Rich Futyma wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Does anyone know why bit 0 in the BIOS Control register cannot be set using<br>
IntelŪ X79 Express Chipset. This is what I get when running:<br>
flashrom -r /tmp/bios.rom -p internal or  flashrom -w xx.rom -p internal<br>
<br>
*Warning: Setting Bios Control at 0xdc from 0x2a to 0x0b on X79 failed.*<br>
*New value is 0x2a.*<br>
</blockquote>
<br>
You can see that bit 1 is already set. This will generate an SMI when you attempt to set bit 0. There will be SMM code that will reset bit 0 if you have not performed the correct handshake beforehand. This is a protection mechanism to prevent unauthorised modification of the BIOS.<span class="HOEnZb"><font color="#888888"><br>

<br>
Andrew<br>
</font></span></blockquote></div><br></div>

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