ROMs for those games matched up with the 24-pin EPROMS of the day.  2716
would be a good starting guess.  If it's still in the circuit you can
deduce the details of the pinout.  If you want to read it out, you can hook
it up as a 2732 and if you've got the smaller part you will just get two
copies of the same file.
--=20
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