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--- a/syslinux.doc
+++ b/syslinux.doc
@@ -176,6 +176,13 @@ LABEL label
UNDI or PXE stacks are, don't worry -- you don't want them,
just specify 0.
+ On ISOLINUX, the "type" specifies the local drive number to
+ boot from; 0x00 is the primary floppy drive and 0x80 is the
+ primary hard drive. The special value -1 causes ISOLINUX to
+ report failure to the BIOS, which, on recent BIOSes, should
+ mean that the next boot device in the boot sequence should be
+ activated.
+
IMPLICIT flag_val
If flag_val is 0, do not load a kernel image unless it has been
explicitly named in a LABEL statement. The default is 1.