common flash hw write enable methods

[Bari Ari]

Ronald G. Minnich wrote:

>On Sun, 1 Dec 2002, Andrew Kohlsmith wrote:
>  
>
>>Now I know that every motherboard is different and that there may be other 
>>things locking me out, but generally speaking is there an "industry standard" 
>>way of enabling/disabling BIOS reflash?  
>>    
>>
>
>No, the goal is to make it hard for you to reflash. So the vendors keep 
>coming up with new ways to hide this. Very annoying!
>
>  
>
The two methods we use for the several motherboards we design a year to 
enable/disable flash writes are:

Method A - Use a jumper.

Method B - Use whatever GPIO is leftover on chipset or Super I/O.

Bari