Index: stable/8/sys/boot/i386/common/drv.c
===================================================================
--- stable/8/sys/boot/i386/common/drv.c	(revision 219656)
+++ stable/8/sys/boot/i386/common/drv.c	(working copy)
@@ -97,6 +97,7 @@ drvread(struct dsk *dskp, void *buf, daddr_t lba,
 	v86.edx = nblk << 8 | dskp->drive;
 #endif	/* !GPT */
 	v86int();
+	v86.ctl = V86_FLAGS;
 	if (V86_CY(v86.efl)) {
 		printf("%s: error %u lba %u\n",
 		    BOOTPROG, v86.eax >> 8 & 0xff, lba);