diff --git a/Documentation/00-INDEX b/Documentation/00-INDEX
index 1977fab..661b6cc 100644
--- a/Documentation/00-INDEX
+++ b/Documentation/00-INDEX
@@ -253,8 +253,6 @@
 	- how to execute Mono-based .NET binaries with the help of BINFMT_MISC.
 moxa-smartio
 	- file with info on installing/using Moxa multiport serial driver.
-mtrr.txt
-	- how to use PPro Memory Type Range Registers to increase performance.
 mutex-design.txt
 	- info on the generic mutex subsystem.
 namespaces/
diff --git a/Documentation/x86/00-INDEX b/Documentation/x86/00-INDEX
new file mode 100644
index 0000000..dbe3377
--- /dev/null
+++ b/Documentation/x86/00-INDEX
@@ -0,0 +1,4 @@
+00-INDEX
+	- this file
+mtrr.txt
+	- how to use x86 Memory Type Range Registers to increase performance
diff --git a/Documentation/mtrr.txt b/Documentation/x86/mtrr.txt
similarity index 99%
rename from Documentation/mtrr.txt
rename to Documentation/x86/mtrr.txt
index c39ac39..cc071dc 100644
--- a/Documentation/mtrr.txt
+++ b/Documentation/x86/mtrr.txt
@@ -18,7 +18,7 @@
   The AMD K6-2 (stepping 8 and above) and K6-3 processors have two
   MTRRs. These are supported.  The AMD Athlon family provide 8 Intel
   style MTRRs.
-  
+
   The Centaur C6 (WinChip) has 8 MCRs, allowing write-combining. These
   are supported.
 
@@ -87,7 +87,7 @@
 reg01: base=0xfb000000 (4016MB), size=  16MB: write-combining, count=1
 reg02: base=0xfb000000 (4016MB), size=   4kB: uncachable, count=1
 
-Some cards (especially Voodoo Graphics boards) need this 4 kB area 
+Some cards (especially Voodoo Graphics boards) need this 4 kB area
 excluded from the beginning of the region because it is used for
 registers.