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 # SPRs <a name="sprs"></a>
 
+Note OpenPOWER v3.1B p12:
+
+     The designated SPR sandbox consists of non-privileged SPRs
+     704-719 and privileged SPRs 720-735.
+
 There are five SPRs, available in any privilege level:
 
 * MVL (the Maximum Vector Length)