INTEGER ISBASE(2,NMCHIP)	!BASE LOCATIONS
	INTEGER ISLOC(NMCHIP+1)	!SPACING TABLE POINTERS
	BYTE IPINSP(2,NMSPIN)	!SPACING TABLE
	INTEGER NXOENT		!NEXT UNUSED ENTRY IN IPINSP
	BYTE IROT(NMCHIP)	!ROTATION CODE
	COMMON / SPCING / ISBASE,ISLOC,NXOENT,IPINSP,IROT
C