diff --git a/sys/arch/i386/stand/biosboot/Makefile b/sys/arch/i386/stand/biosboot/Makefile
index 6083a354e4ef..1b6e80d38920 100644
--- a/sys/arch/i386/stand/biosboot/Makefile
+++ b/sys/arch/i386/stand/biosboot/Makefile
@@ -1,4 +1,4 @@
-#	$NetBSD: Makefile,v 1.33 2000/11/02 01:02:07 thorpej Exp $
+#	$NetBSD: Makefile,v 1.34 2001/03/31 09:45:12 hubertf Exp $
 
 S=	${.CURDIR}/../../../../
 
@@ -60,7 +60,8 @@ CPPFLAGS+= -DPASS_MEMMAP
 CFLAGS+= -Wall -Wmissing-prototypes -Wstrict-prototypes -Wno-main
 
 SAMISCCPPFLAGS+= -DHEAP_START=0x20000 -DHEAP_LIMIT=0x50000
-SAMISCMAKEFLAGS= SA_USE_CREAD=yes SA_INCLUDE_NET=no
+SAMISCMAKEFLAGS+= SA_USE_CREAD=yes	# Read compressed kernels
+SAMISCMAKEFLAGS+= SA_INCLUDE_NET=no	# Netboot via TFTP, NFS
 
 .if (${BASE} == "biosboot")
 VERSIONFILE= ${.CURDIR}/version
diff --git a/sys/arch/i386/stand/biosboot_ser/Makefile b/sys/arch/i386/stand/biosboot_ser/Makefile
index e9c5e70ae9d7..8591a3fb318a 100644
--- a/sys/arch/i386/stand/biosboot_ser/Makefile
+++ b/sys/arch/i386/stand/biosboot_ser/Makefile
@@ -1,4 +1,4 @@
-#	$NetBSD: Makefile,v 1.5 2000/06/02 18:26:11 thorpej Exp $
+#	$NetBSD: Makefile,v 1.6 2001/03/31 09:45:12 hubertf Exp $
 
 S=	${.CURDIR}/../../../../
 
@@ -35,7 +35,8 @@ CPPFLAGS+= -DPASS_MEMMAP
 CFLAGS+= -Wall -Wmissing-prototypes -Wstrict-prototypes -Wno-main
 
 SAMISCCPPFLAGS+= -DHEAP_START=0x10000 -DHEAP_LIMIT=0x40000
-SAMISCMAKEFLAGS= SA_USE_CREAD=yes SA_INCLUDE_NET=no
+SAMISCMAKEFLAGS= SA_USE_CREAD=yes	# Read compressed kernels
+SAMISCMAKEFLAGS= SA_INCLUDE_NET=no	# Support netboot 
 
 VERSIONFILE= ${.CURDIR}/../biosboot/version
 
diff --git a/sys/lib/libsa/Makefile b/sys/lib/libsa/Makefile
index 93ac6cf1db4c..a6e2e6fc5609 100644
--- a/sys/lib/libsa/Makefile
+++ b/sys/lib/libsa/Makefile
@@ -1,12 +1,12 @@
-#	$NetBSD: Makefile,v 1.43 2000/11/02 00:25:05 thorpej Exp $
+#	$NetBSD: Makefile,v 1.44 2001/03/31 09:45:11 hubertf Exp $
 
 LIB=	sa
 MKPIC=	no
 MKPROFILE=no
 
-SA_USE_CREAD?= no
-SA_INCLUDE_NET?= yes
-SA_USE_LOADFILE?= no
+SA_USE_CREAD?= no		# Read compressed kernels
+SA_INCLUDE_NET?= yes		# Netboot via TFTP, NFS
+SA_USE_LOADFILE?= no		#
 
 #DEBUGCPPFLAGS= -DBOOTP_DEBUG -DNETIF_DEBUG -DETHER_DEBUG -DNFS_DEBUG -DRPC_DEBUG -DRARP_DEBUG -DNET_DEBUG -DDEBUG -DPARANOID
 CPPFLAGS=	-I${SADIR} ${SACPPFLAGS} ${SAMISCCPPFLAGS} \