Reply 20 of 27, by KingGuppy
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We know what 1 is, I'm guessing that 2 is the gate array (is it surface-mounted?) and 3 is... something else, but not a ROM.
So, it certainly sounds like you were right in the first place about that stickered chip being the control ROM (I guess the marked numbers indicate the version). Is there anything stamped on the chip under the sticker?