diff --git a/doc/install.txt b/doc/install.txt
index 69f640c..558be0b 100644
--- a/doc/install.txt
+++ b/doc/install.txt
@@ -53,8 +53,10 @@ for other ports such as MacOS or Windows have not yet been written.
 
 	$ cd <distrib>/bld/<platform>
 	$ make base-kl		;;; or base-ks or base-ks-its
+    or to make all variants, installing to <distrib>/new/<platform>-<model>:
+	$ ../MAKE-ALL
 
-    Or see the "Building" section farther on.
+    Or see the "BUILDING FROM SOURCES" section farther on.
     Read "doc/dfkfb.txt" if you want to do a quick KL performance test now.
 
 
@@ -233,6 +235,11 @@ BUILDING FROM SOURCES
 
 Notes:
 
+The "*axp" directories are not only useful for Alpha AXP hosts, but also
+for any other little-endian 64-bit CPU. That includes amd64 aka x86_64.
+While the x86 configuration may work on amd64, it is likely to be
+a bit less efficient.
+
 Solaris has two possible Makefiles; the default uses GCC, but you
 can change the link to Mk-solsparc-cc.mk which uses Sun's C compiler.
 
diff --git a/src/Mk-lnaxp.mk b/src/Mk-lnaxp.mk
index 891ec9a..c094e0b 100644
--- a/src/Mk-lnaxp.mk
+++ b/src/Mk-lnaxp.mk
@@ -1,5 +1,5 @@
-# KLH10 Makefile for Linux on i386
-# $Id: Mk-lnx86.mk,v 2.5 2002/04/24 18:03:04 klh Exp $
+# KLH10 Makefile for Linux on amd64 / x86_64 / Alpha
+# (or any other little-endian 64-bit cpu)
 #
 #  Copyright © 2001 Kenneth L. Harrenstien
 #  All Rights Reserved
diff --git a/src/Mk-nbaxp.mk b/src/Mk-nbaxp.mk
index 4cbb309..0ca1260 100644
--- a/src/Mk-nbaxp.mk
+++ b/src/Mk-nbaxp.mk
@@ -1,5 +1,5 @@
-# KLH10 Makefile for NetBSD on Alpha
-# $Id: Mk-nbaxp.mk,v 2.5 2002/04/26 05:59:32 klh Exp $
+# KLH10 Makefile for NetBSD on amd64 / x86_64 / Alpha
+# (or any other little-endian 64-bit cpu)
 #
 #  Copyright © 2001 Kenneth L. Harrenstien
 #  All Rights Reserved
diff --git a/src/Mk-osfaxp.mk b/src/Mk-osfaxp.mk
index 28ee2b7..9a6c8e4 100644
--- a/src/Mk-osfaxp.mk
+++ b/src/Mk-osfaxp.mk
@@ -1,4 +1,5 @@
-# KLH10 Makefile for OSF/1 (DU, Tru64) on Alpha
+# KLH10 Makefile for OSF/1 (DU, Tru64) on amd64 / x86_64 / Alpha
+# (or any other little-endian 64-bit cpu)
 # $Id: Mk-osfaxp.mk,v 2.3 2001/11/10 21:28:59 klh Exp $
 #
 #  Copyright © 2001 Kenneth L. Harrenstien