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diff --git a/qemu/roms/SLOF/slof/fs/available.fs b/qemu/roms/SLOF/slof/fs/available.fs
new file mode 100644
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+++ b/qemu/roms/SLOF/slof/fs/available.fs
@@ -0,0 +1,72 @@
+\ *****************************************************************************
+\ * Copyright (c) 2004, 2008 IBM Corporation
+\ * All rights reserved.
+\ * This program and the accompanying materials
+\ * are made available under the terms of the BSD License
+\ * which accompanies this distribution, and is available at
+\ * http://www.opensource.org/licenses/bsd-license.php
+\ *
+\ * Contributors:
+\ *     IBM Corporation - initial implementation
+\ ****************************************************************************/
+
+VARIABLE chosen-memory-ih 0 chosen-memory-ih !
+
+\ +
+\ Maintain "available" property.
+\ Sun has a single memory node with "available" property
+\ and separate memory controller nodes.
+\ We corespond memory nodes with their respective memory controllers
+\ and use /chosen/memory as default memory node to hold the "available" map
+\ NOTE -> /chosen/memory is expected 2B initialized before using claim/release
+\ +
+
+: (chosen-memory-ph) ( -- phandle )
+	chosen-memory-ih @ ?dup 0= IF
+		s" memory" get-chosen IF
+			decode-int nip nip dup chosen-memory-ih !
+			ihandle>phandle
+		ELSE 0 THEN
+	ELSE ihandle>phandle THEN
+;
+
+: (set-available-prop) ( prop plen -- )
+	s" available"
+	(chosen-memory-ph) ?dup 0<> IF set-property ELSE
+		cr ." Can't find chosen memory node - "
+		." no available property created" cr
+		2dup 2dup
+	THEN
+;
+
+: update-available-property ( available-ptr -- )
+	dup >r available>size@
+	0= r@ available AVAILABLE-SIZE /available * + >= or IF
+		available r> available - encode-bytes (set-available-prop)
+	ELSE
+		r> /available + RECURSE
+	THEN
+;
+
+: update-available-property available update-available-property ;
+
+\ \\\\\\\\\\\\\\ Exported Interface:
+\ +
+\ IEEE 1275 implementation:
+\	claim
+\ Claim the region with given start address and size (if align parameter is 0);
+\ alternatively claim any region of given alignment
+\ +
+\ Throw an exception if failed
+\ +
+: claim ( [ addr ] len align -- base ) claim update-available-property ;
+
+\ +
+\ IEEE 1275 implementation:
+\	release
+\ Free the region with given start address and size
+\ +
+: release ( addr len -- ) release update-available-property ;
+
+update-available-property
+