Re: EPROM identification

["Bruce Plecan" <nacelp@bright.net>]

> How can I tell for sure what the size of an eprom is?

Try reading both ways.  Then view with a file editor, the "wrong" reading
will be real apparent.
Grumpy

I've got several
> chips for my '165 ECM and I have run into a situation where GM may have
used
> a chip size larger than 128K but I can't figure out a way to tell for sure
> what size the chips are.  The P/N's on the chips don't seem to decode.
> Here's a sample of the stamping on one of the chips exactly how it's
printed
> on the chip:
>
> 014
> 69300
> B9617TB
>
> Any ideas?  I've read it as a 27C128, 27C256, & 27C512.  I get a non
> repeating .bin with the 128.  The 256 reads the same as the 128 just
> repeated again at the end.  The 512 is on there four times.  That's as
large
> as I can go with my Pocket Programmer and I doubt the chip is any larger
> than that (probably not even that large) but how can I tell for sure short
> of the part number clueing me in.  -Jeff
>
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