TITLE	GETRAN GET BOTH HALVES OF RANDOM NUMBER
	SUBTTL	V.001  R.S.TOMLINSON 19 AUG 68
	ENTRY	GETRAN
	INTERN	GETRAN
	EXTERN	RAND

; GET BOTH HALVES OF RANDOM NUMBER
; THIS ROUTINE GETS THE ORIGIN OF THE RANDOM NUMBER SEQUENCE AND
; IS USED IN CONJUNCTION WITH SETRAN TO ALLOW A "RANDOM" NUMBER
; SEQUENCE TO BE REPEATED.
; THE FIRST RANDOM NUMBER GENERATED AFTER A CALL TO GETRAN WILL BE
; THE SAME AS THE FIRST RANDOM NUMBER GENERATED AFTER A CALL TO SETRAN
; WITH THE SAME ARGUMENTS.  THUS IN THE FOLLOWING PROGRAM:
;	CALL GETRAN(I,J)
;	X=RANDOM(1.0,2.0)
;	CALL SETRAN(I,J)
;	Y=RANDOM(1.0,2.0)
; X AND Y WILL BE SET TO THE SAME NUMBER.
; CALL:	JSA 16,GETRAN
;	ARG 00,<WHERE TO PUT HIGH PART OF RANDOM NUMBER>
;	ARG 00,<WHERE TO PUT LOW PART OF RANDOM NUMBER>
;	. . .

; Modified to PUSHJ/POPJ calling convention 11 Oct 1980
; by Paul T. Robinson, Wesleyan Univ. for DECUS conversion to DEC-20
; Calling sequence is
;	movei	16,[exp	<where to put high part>
;		    exp	<where to put low part>]
;	pushj	17,getran


GETRAN:	pushj	17,rand	;get random number
	MOVEM 0,@0(16)	; STORE IT IN THE ARGUMENTS
	MOVEM 1,@1(16)
	popj	17,

	END