.MCALL	.MODULE
.MODULE	IADDR,VERSION=04,COMMENT=<IADDR/SYSLIB>,IDENT=No,LIB=Yes

; Copyright (c) 1998 by Mentec, Inc., Nashua, NH.
; All rights reserved
;
; This software is furnished under a license for use only on a
; single computer system and  may  be  copied  only  with  the
; inclusion of the above copyright notice.  This software,  or
; any other copies thereof, may not be provided  or  otherwise
; made available to any other person except for  use  on  such
; system and to one who agrees to these license  terms.  Title
; to  and  ownership of the software shall at all times remain
; in Mentec, Inc.
;
; The information in this document is subject to change without
; notice and should not be construed as a commitment by Digital
; Equipment Corporation, or Mentec, Inc.
;
; Digital and Mentec  assume  no  responsibility for the use or
; reliability of its software on equipment which is not supplied
; by Digital  or Mentec,  and listed  in the  Software  Product
; Description.
	.SBTTL	Module Declarations

	.NLIST
	.ENABL	LC
	.DSABL	GBL
	.NLIST	CND
	.LIST
; ++
; FACILITY:
;
;    RT-11 System Subroutine Library
;
; ENVIRONMENT:
;
;    This routine can be used by any job running in a single-job
;    or multi-job environment.  It uses "TRAP" to provide  error
;    processing.
;
; INCLUDE FILES:
;

;
; EXTERNAL REFERENCES:
;

	.GLOBL	$NXADR		; Entry point to next address routine.
	.GLOBL	$SYSLB		; Include system library work area.
	.WEAK	$MSARG		; Trap code for missing argument
	.SBTTL	IADDR - Fortran-callable Routine

; ++
; FUNCTIONAL DESCRIPTION:
;
;    The IADDR function returns the 16-bit virtual address of its  passed
;    argument.
;    
; CALLING SEQUENCE:
;
;    i = IADDR( arg )
;
; INPUT PARAMETERS:
;
;    R5	     -	address of IADDR's argument block
;
;    0(R5)   -	argument count of IADDR call
;    2(R5)   -	address of entity to return 16-bit virtual address of
;
; OUTPUT PARAMETERS:
;
;    R0	     -	16-bit virtual address of passed entity
;
; ROUTINE VALUE:
;
;    16-bit virtual address of passed entity
;
; --

	.PSECT	SYS$I

IADDR::				; Entry point to IADDR routine.
	MOV	(R5)+,R4	; R4 <- argument count.

	CALL	$NXADR		; Get -> 'arg' argument; it's returned in R0
				; if supplied by caller.
	BCC	10$		; If CS, error - 'arg' argument wasn't
				; supplied; report missing argument in call.
	TRAP	$MSARG		; Handle any missing arguments in call
10$:	RETURN			; Return to caller with 16-bit virtual address
				; of passed entity in R0.
	.END