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diff --git a/sys/pmio/pmstati.x b/sys/pmio/pmstati.x
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+# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
+
+include	<syserr.h>
+include	<pmset.h>
+include	<plio.h>
+include	<imio.h>
+
+# PM_STATI -- Stat a PMIO or PLIO parameter.
+
+int procedure pm_stati (pl, param)
+
+pointer	pl			#I mask descriptor
+int	param			#I parameter code
+
+int	i
+
+begin
+	switch (param) {
+	case P_REFIM:
+	    return (PM_REFIM(pl))
+	case P_MAPXY:
+	    return (PM_MAPXY(pl))
+	case P_MAXLINE:
+	    return (PL_MAXLINE(pl))
+	case P_DEPTH:
+	    do i = 0, ARB
+		if (2**i > min (I_PVMAX, PL_MAXVAL(pl)))
+		    return (i)
+	default:
+	    call syserr (SYS_PLINVPAR)
+	}
+end