Etched in copper on top of board	MADE IN U.S.A			
					RAMTEK COPYRIGHT 1973 ASSY*500986B	B was handwritten
					
Etched in copper on bottom of board	PART NO. 500963

Missing clock circuit @A0

.a4	unknown 
	MMI 398 10835 75351	was on the chip	
	read as 82s123

.g7	IM5610	read as 82s123


MaME 0.124a
C:\Hardware\Dataio\roms\Other\ramtek6\roms>c:\hardware\dataio\roms\mame\mame -romident ramtek6.a4 
ramtek6.a4          NO MATCH

C:\Hardware\Dataio\roms\Other\ramtek6\roms>c:\hardware\dataio\roms\mame\mame -romident ramtek6.g7 
ramtek6.g7          NO MATCH