I'm not sure how to read the osccal value, but I've done a read on the four
eight-pin devices I've got in stock and they all have a value written into
the top address.  Is this the osccal value?

On the basis that it might be, here are the values:

12C509A: C70
12C509A: C74

12C508A: C70
12C508A: C74

Funny there are only two values, although it is a tiny sample.  Don't know
if this is of any help.

Steve

Steve Thackery
Suffolk, England.
Web Site: http://www.btinternet.com/~stevethack/