.TITLE	RMSRAC
	.IDENT	/01.00/
	.PSECT	RMSFTN
	;
	;
	;
;BRIDGEPORT-TEXTRON BRIDGEPORT-TEXTRON BRIDGEPORT-TEXTRON BRIDGEPORT-TEXTRON
;B									   B
;R	PURPOSE: A FORTRAN COMPATIBLE RMS INTERFACE			   R
;I									   I
;D									   D
;G	AUTHOR: ARTHUR P. GAUGHAN, JR.					   G
;E									   E
;P	DATE: 5/31/78							   P
;O									   O
;R	GLOBAL SYMBOLS DEFINED IN THIS MODULE: RMSRAC			   R
;T									   T
;!	GLOBAL SYMBOLS REFERENCED IN THIS MODULE:			   !
;T									   T
;E									   E
;X									   X
;T									   T
;R									   R
;O	INPUTS: CALL RMSRAC (LUN,MODE,ISTAT)				   O
;N		CALLG RMSRAC <#LUN,#MODE,#ISTAT>			   N
;!	OUTPUTS: ISTAT							   !
;!									   !
;H	HOUSEKEEPING:							   H
;O									   O
;R									   R
;S	NOTES:								   S
;H									   H
;A									   A
;M									   M
;BRIDGEPORT-TEXTRON BRIDGEPORT-TEXTRON BRIDGEPORT-TEXTRON BRIDGEPORT-TEXTRON
	;
	;
	;
	.MCALL	RABOF$,RAB$BT
	.MCALL	SMACIT
	;
	;
	;
	RABOF$	RMS$L			;DEFINE OFFSETS LOCALLY
	RAB$BT	DFIN$L			;DEFINE RAB BIT PATTERNS LOCALLY
	SMACIT				;DEFINE SUPERMAC
	;
	;
	;
	;DEFINE FORTRAN COMPATIBLE PARAMETER BLOCK
	;
	;
	;
	LUN=2
	MODE=4
	ISTAT=6
	NULARG=-1
	;
	;
	;
	PROCEDURE	RMSRAC,GLOBAL
	;
	;
	;
	IFB (R5) NE #3			;THREE ARGUMENTS???
	  TRAP				;IF NOT, QUIT HERE
	END
	IF ISTAT(R5) EQ #NULARG		;NO STATUS BLOCK?
	  EMT				;IF NOT, QUIT HERE
	END
	;
	;
	;
	IF LUN(R5) EQ #NULARG		;LUN SPECIFIED?
	  LET @ISTAT(R5) := #XX$LUN	;IF NOT, SAY LUN NOT SPECIFIED
	  $RETURN			;RETURN TO CALLER
	END
	LET R2 := @LUN(R5)		;PICK UP LUN
	LET R2 := R2 L.SHIFT 1		;CONVERT TO WORD INDEX
	IF $$$FAB(R2) EQ #0		;FILE ALREADY OPEN???
	  LET @ISTAT(R5) := #XX$OPN	;SAY FILE NOT OPEN
	  $RETURN			;RETURN TO CALLER
	END
	IF $$$RAB(R2) EQ #0		;RECORD STREAM ALREADY CONNECTED?
	  LET @ISTAT(R5) := #XX$STM	;SAY STREAM NOT CONNECTED
	  $RETURN			;RETURN TO CALLER
	END
	IF MODE(R5) EQ #NULARG		;ACCESS MODE SPECIFIED?
	  LET @ISTAT(R5) := #XX$NOP	;SAY NO OPERATION POSSIBLE
	  $RETURN
	END
	IF @MODE(R5) HI #RB$RFA		;LEGAL ACCESS MODE??
	  LET @ISTAT(R5) := #XX$RAC	;SET ILLEGAL ACCESS MODE
	  $RETURN			;RETURN TO CALLER
	END
	;
	;
	;
	LET R0 := $$$RAB(R2)		;PICK UP RAB ADDRESS
	LET O$RAC(R0) :B= @MODE(R5)	;SET ACCESS MODE
	LET @ISTAT(R5) := #SU$SUC	;SET SUCCESS
	$RETURN				;RETURN TO CALLER
	;
	;
	;
	;///////////////////////////////////////////////////////////////////////
	.END