Thank you for your response. The chip tested is M27C4002 40-pin, which I previously stated as being 44, oops. We also had one of our techs test a M27V160 and got the same result.

We recently purchased the 48Pro2 for the purpose of reading a large amount of 48 and 44-pin eproms. We are slot machine regulators, and have no need for programming, only reading. All of our chips are covered with a label which would be to time/cost consuming to remove which is why we purchased this...