The problem with the word “legacy” is that it’s only meaning (in
engineering) is “thing that I wish that I didn’t have to deal with any
more.” So to understand what it means in context, you have to know who
wrote it and when, and possibly how old that person is. USELEGACYAPICMODE
was written fairly recently by a guy who was about 30 at the time. So his
definition of “legacy” is a lot more recent than yours. He was talking
about forcing the processors into XAPIC mode when X2APIC mode is an option.
If you want to actually put the APIC system into virtual wire mode, the
right incantation is:
bcdedit /set hal halacpi.dll
The only thing that I can say about your other questions is that that’s
exactly what I would expect those settings to do at a high level. How is it
that you think that they’re not “reflected?” What would your definition of
“reflected?” be?
Of course, if you actually say what you’re trying to accomplish, I might be
able to tell you how to do it.
Jake Oshins
Windows Kernel Team
This message offers no warranties and confers no rights.
wrote in message news:xxxxx@ntdev…
Hi, I have several questions about the OSLOADER boot parameters. Some of
these parameters are backed by an article, but for other settings I can
hardly find any information.
The /USELEGACYAPICMODE switch, which set the APIC in ‘legacy APIC mode,’.
Does this enable APIC virtual wire mode ? Does this disable the local APIC
as well, so that it behaves as a legacy 8259 PIC ? If not is there another
switch for that ?
Can anybody tell me about the CONFIGFLAGS parameters other than that they
are processor specific ? Is there any information I can find in the CPU
manuals ? (I couldn’t so far)
Then about /CLUSTERMODEADDRESSING and /RESTRICTAPICCLUSTER. Whatever values
I put in there, I do not see them reflected. The only thing
that I observe is that the system behaves in a different way, interrupts are
spread between processors instead of always sent to the lowest processor but
the parameters do not appear to be honored. Can anyone please tell me more
about them ?
Any replies will be greatly appreciated.
//Daniel