=== modified file 'doc/multiboot.texi'
--- doc/multiboot.texi	2010-01-12 16:49:46 +0000
+++ doc/multiboot.texi	2010-01-15 16:52:03 +0000
@@ -817,7 +817,9 @@
 can be greater than the minimum of 20 bytes. @samp{base_addr} is the
 starting address. @samp{length} is the size of the memory region in bytes.
 @samp{type} is the variety of address range represented, where a
-value of 1 indicates available @sc{ram}, and all other values currently
+value of 1 indicates available @sc{ram}, value of 3 indicates usable memory
+holding ACPI information, value of 4 indicates reserved memory which needs to
+be preserved on hibernation and all other values currently
 indicated a reserved area.
 
 The map provided is guaranteed to list all standard @sc{ram} that should