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
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.
> -----Original Message-----
> From: Ronald G. Minnich [SMTP:email@example.com]
> Sent: Monday, February 07, 2000 11:40 AM
> To: openbios(a)elvis.informatik.uni-freiburg.de
> Subject: [OpenBIOS] l440gx+ nvram writing ...
> 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!
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