wonder aloud if any other systems that preceeded this one, had such holes?
• Two of the three Ormatu carts I examined had 2732 variants on them; the PC boards both had “FOR 2k / 4k EPROM” etched into the upper and lower board sides. This implies that they had other boards, as Emerson did, to use with masked ROM chips. The third board had such a masked ROM, and it was indeed on a different style of PC board. It was marked “PCB190082” on both sides, with no other markings or notations visible. That board had a huge ground plane, covering most of the boards surface on both sides; what that implies as far as which board style came first, I won’t try to speculate now. Neither of these two board styles had any provision for an RF (metal) shield. • There were two other text notations on the PC boards that had the 2732’s on them. The first of three lines of text reads “M-SERIES (M-1800)”. Below that is a line which reads “11-40253-30” which I presume is an internal part number of some kind. The third line read “FOR 2k / 4k EPROM” as noted above. Note the “…-30” par
