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Thank you srizbf, that was it. I went on National Semiconductors site and did an obsolete parts search for MM9518N and it popped up. Turns out the part expired back in 2002 with no replacement part. No data sheet available, but at least I know what it is. Thanks again to everyone who posted.
I got it from a bag of random components (caps, inductors, ICs, etc), the company I ordered it from didn't include any datasheets or anything. I'll play around with it and see if it matches the Intel microcontroller I saw on digi-key. If I fry it then it won't be much of a loss anyway. Thanks...
I recently ordered a grab bag of electronic components and in it was a 40 pin DIP IC.
It has what I assume to be a manufacturer's name or initials "AH" and two numbers on it "S9330E4" and "MM9518N" right below it. A Google search for the first number turned up nothing and the second number...
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