Shahid-
This is normal. Unprogrammed state of an EPROM cells is '1'.  Maximum word
length of the PIC families of interest is 14 bits, so the software is
displaying 14 bits worth of 1's. This is hexadecimal 0x3fff. I don't know
where this is documented- perhaps in the programming specs from Microchip. I
think this is the question you want answered...?

Brian
-----Original Message-----
From: Shahid Sheikh <sheikh@EROLS.COM>
To: PICLIST@MITVMA.MIT.EDU <PICLIST@MITVMA.MIT.EDU>
Date: Sunday, March 15, 1998 2:43 PM
Subject: Problems with the ProPic programmer (newbie)


>Hi all,
>
>I just made a propic v4.2 (from TATO Computers) programmer and when I read
>a blank (new) 12C509JW in it, it gives me 3FFF on all the locations. That
<snip>