Random number generator

C1/185B:	DA      	PHX 			(from C1/6F18, C1/7F28, C1/7F2F, C1/B3BC, C1/B444, C1/CF7F, C1/D3BA, C1/D727, C1/D784, C1/D912, C1/D96E, C1/D977, C1/DC9B, C1/DCA0, C1/F8ED, C1/F910)	
C1/185C:	A572    	LDA $72		
C1/185E:	AA      	TAX 
C1/185F:	E672    	INC $72
C1/1861:	22B0D6C0	JSL $C0D6B0
C1/1865:	FA      	PLX 
C1/1866:	60      	RTS