add directory study

study/boot/LILO/lilo/lilo-21.announce

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+LILO 21 can be found at
+
+  ftp://lrcftp.epfl.ch/pub/linux/local/lilo/lilo-21.tar.gz
+
+and soon also at
+
+  ftp://sunsite.unc.edu/pub/Linux/system/boot/lilo/lilo-21.tar.gz
+  ftp://tsx-11.mit.edu/pub/linux/packages/lilo/lilo-21.tar.gz
+
+On sunsite and lrcftp, there are also pre-built PostScript versions of the
+user's guide and of the technical overview:
+
+  ftp://lrcftp.epfl.ch/pub/linux/local/lilo/lilo-t-21.ps.gz
+  ftp://lrcftp.epfl.ch/pub/linux/local/lilo/lilo-u-21.ps.gz
+  ftp://sunsite.unc.edu/pub/Linux/system/boot/lilo/lilo-t-21.ps.gz
+  ftp://sunsite.unc.edu/pub/Linux/system/boot/lilo/lilo-u-21.ps.gz
+
+This release fixes a few comparably urgent problems:
+
+ - LINEAR sometimes mis-calculated addresses
+ - NT 4 failed to boot with "INACCESSIBLE_BOOT_DEVICE" in some cases if
+   it didn't find a certain bit pattern in the MBR
+ - LILO's use of the address space below 0x100000 conflicts with some
+   recent MP systems (see option LARGE_EBDA)
+ - various minor problems with change rules
+
+Given the large number of changes, this version should be considered as
+experimental and should be used with due precautions.
+
+I've attached the complete list of changes.
+
+Note that I've queued several less critical changes and enhancements
+which are not part of this release. So if you sent me a patch and you
+don't find it here, this doesn't necessarily mean that I didn't like
+it. It may be a good idea to send it again, though ;-)
+
+- Werner
+
+---------------------------------- cut here -----------------------------------
+
+Changes from version 20 to 21 (5-DEC-1998)
+-----------------------------
+
+  Boot loader
+  -----------
+
+    - cylinder calculation could overflow when using LINEAR (fix by Jonas
+      Aaberg and an anonymous contributor)
+    - first-stage loader code begins with the byte 0xFA (a CLI instruction).
+      This works around the "INACCESSIBLE_BOOT_DEVICE" blue screen bug of
+      Windows NT 4 (reported by too many people to mention)
+    - new build-time option LARGE_EBDA to load boot loader in the 0x8xxxx area
+      instead of the 0x9xxxx area (disabled by default; problem reported by
+      Josef Moellers)
+
+  Map installer
+  -------------
+
+    - new build-time option USE_TMPDIR to honor TMPDIR when creating temporary
+      devices (disabled by default)
+    - now only 0x1b6 bytes of the boot sector are overwritten, which preserves
+      the passwords DR DOS stores there (fixed by Roy Millar)
+    - -u and -U accidently implied -v
+    - "BIOS drive 0xNN may not be accessible" warning was printed in cases
+       where the drive code was never used (fixed by Andries Brouwer)
+    - change rule for DOS16_big incorrectly used DOS16_small_hidden when
+      hiding (fixed by Anthony Richardson)
+    - RESET in CHANGE-RULES did not remove default rules (fixed by Kurt
+      Garloff)
+    - added support for Mylex DAC960 PCI RAID controllers (by Leonard Zubkoff)
+    - added support for third to sixth IDE interface
+    - build-time option READONLY was not used properly
+    - fixed a few harmless compiler warnings
+
+  Documentation and installation
+  ------------------------------
+
+    - user's guide claimed that partitions are hidden by setting the highest
+      bit in the type (i.e. 0x80). The correct value is 0x10, which is also
+      what is used in the code.
+    - removed useless (and potentially harmful) DEFAULT_PATH from
+      keytab-lilo.pl (fixed by Andries Brouwer)
+    - consistency of build-time options is now checked before build starts
+    - QuickInst has now limited knowledge of multi-disk configurations
+    - doc/Makefile: added targets user.ps and tech.ps
+    - user's guide still claimed that kernels can't be larger than 512 kB
+      (reported by Jean-Albert Ferrez)
+    - weird description of the purpose of option BEEP (reported by Tom Toffoli)