COMMON IGX1, IGX2
	DIMENSION IGX1(1600), IGX2(1600)
	CALL GCLEAR
	CALL GSTART
5	CALL GCLEAR
	DO 20 I = 1,16
	DO 10 J = 1,1585,16
	K = I+J-1
10	IGX1(K) = IRDSW(0)
	DO 15 J = 1,1585,16
	K = I+J-1
15	IGX2(K) = IRDSW(0)
20	CONTINUE
30	IF(IRDSW(0)-2)40,50,30
40	IF(IRDSW(0)-1)30,5,30
50	CALL GSTOP
	CALL EXIT
	END
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