[OpenBIOS] l440gx+ nvram writing ...

[Thierry Deval]

Just to clarify :

SMI# , SMI_L , ~SMI or SMI with a long dash above it (I can't draw it here) are
some digital electronic notations to mean a SMI signal which is active LOW (OV).

my .02

On 07-Feb-00 Wallace I. Kroeker wrote:
> I found this in the P6 Hardware Developer's Manual
> 
> A.1.49 SMI# (I)
> The SMI# (System Management Interrupt) signal is asserted asynchronously by
> system logic. On
> accepting a System Management Interrupt, processors save the current state
> and enter System
> Management Mode (SMM). An SMI Acknowledge transaction is issued, and the
> processor begins
> program execution from the SMM handler.
> 
> I am guessing SMI_L is a system management Interrupt and the SMI Acknowledge
> is what you will be trying to do.
> 
> More digging required.
> 
> Wallace
> 
> 
>> -----Original Message-----
>> From:        Ronald G. Minnich [SMTP:rminnich at lanl.gov]
>> Sent:        Monday, February 07, 2000 11:40 AM
>> To:  openbios at elvis.informatik.uni-freiburg.de
>> Subject:     [OpenBIOS] l440gx+ nvram writing ...
>> 
>> more.
>> 
>> You can enable/disable smi_l in the bios. I'm going to check that today.
>> If smi_l is disabled, your OS will never know that the BUD asserted an
>> interruptt when you tried to write the BIOS> 
>> 
>> 
>> The remaining question, of course, is what you're supposed to do with that
>> interrupt, but that's next. 
>> 
>> it's rather amazing, but intel is shipping a server motherboard that
>> REQUIRES DOS to be upgraded. You have to wonder sometimes, what are people
>> thinking? The only exisiting SMI_L interrupt handler is in the BIOS!
>> 
>> ron
>> 
>> 
>> 
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E-Mail: Thierry Deval <TDeval at PrimeOBJ.COM>
Date: 07-Feb-00
Time: 22:17:31

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