common flash hw write enable methods

[Ronald G. Minnich]

On Wed, 4 Dec 2002, Stefan Reinauer wrote:

> Some machines, like my Thinkpad A21p, reboot immediately on probing, if
> the right GPIO is not set. Pretty ugly. 

yes, this is an iterative process with many landmines. 

> 
> > get the flash burner for this board, run under a simulator of some sort, 
> > and watch the IOs. Or put a PCI bus analyzer on the machine, run the flash 
> > program, and watch the IOs. It's not going to be fun.
>  
> ouch! sounds like this gets nasty quickly.

actually the PCI analyzer is the easiest, it allowed us to figure out 
L440GX flash and ASUS SMBUS issues in about 15 minutes.

ron