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diff --git a/sys/osb/nminelem.x b/sys/osb/nminelem.x
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+# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
+
+include	<mach.h>
+
+# NMINELEM -- Determine the number of NMI elements of the given datatype
+# which can be stored in an SPP char array of the indicated length.
+# The nmi_type codes are defined in nmi.h; we assume here that the codes
+# used are the number of bits in each NMI type.
+
+int procedure nminelem (nchars, nmi_type)
+
+int	nchars			#I size in chars of packed array
+int	nmi_type		#I NMI type of packed data
+
+int	nbits
+
+begin
+	nbits = abs (nmi_type)
+	return ((nchars * SZB_CHAR * NBITS_BYTE) / nbits)
+end