MFi386: revisions from 1.1102 to 1.1105.

1 files changed, 13 insertions, 16 deletions

diff --git a/sys/pc98/conf/NOTES b/sys/pc98/conf/NOTES
index 7dec1d8..321d531 100644
--- a/sys/pc98/conf/NOTES
+++ b/sys/pc98/conf/NOTES
@@ -23,30 +23,27 @@ profile         2
 #####################################################################
 # SMP OPTIONS:
 #
-# The apic device enables the use of the IO APIC for Symmetric I/O.
+# The apic device enables the use of the I/O APIC for interrupt delivery.
+# The apic device can be used in both UP and SMP kernels, but is required
+# for SMP kernels.  Thus, the apic device is not strictly an SMP option,
+# but it is a prerequisite for SMP.
 #
 # Notes:
 #
-#  An SMP kernel will ONLY run on an Intel MP spec. qualified motherboard.
+# Be sure to disable 'cpu I386_CPU' for SMP kernels.
 #
-#  Be sure to disable 'cpu I386_CPU' && 'cpu I486_CPU' for SMP kernels.
-#
-#  Check the 'Rogue SMP hardware' section to see if additional options
-#   are required by your hardware.
+# By default, mixed mode is used to route IRQ0 from the AT timer via
+# the 8259A master PIC through the ExtINT pin on the first I/O APIC.
+# This can be disabled via the NO_MIXED_MODE option.  In that case,
+# IRQ0 will be routed via an intpin on the first I/O APIC.  Not all
+# motherboards hook IRQ0 up to the first I/O APIC even though their
+# MP table or MADT may claim to do so.  That is why mixed mode is
+# enabled by default.
 #
 
 # Mandatory:
 device		apic			# I/O apic
-
-#
-# Rogue SMP hardware:
-#
-
-# Bridged PCI cards:
-#
-# The MP tables of most of the current generation MP motherboards
-#  do NOT properly support bridged PCI cards.  To use one of these
-#  cards you should refer to ???
+options 	NO_MIXED_MODE		# Disable use of mixed mode
 
 
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