Tony Duell wrote:
  The way to make sure I program in correctly is to
publsih the
 programmign algorithm. Then I will follow that,. 
 Sure, but they're not worried about *you*.  They're worried about some
 random idiot, who *claims* to have followed the published algorithm, but
 somehow screwed up, and then wants to return an entire lot of EPROMs
 that he claims are of defective manufacture. 
I do wonder just how big a problem this would be...
Good hobbyists are goign to be honest, and if they damage the chip are
goign to say 'Oh d*mn' and go and buy another one.
OK, there may be soem who try to return the chip for a free replacement,
but the total number of chips inovlved is going to be fairly small (as a
fraction of the totla production of said ICs). Hobbyists tend to use 1 or
2 ICs, not 1 or 2 thousand.
And I would have though that hobbyists are the only group likely to take
the time to attmpto to designed ap rogrammer. For any commerical
organisation it's going to be a lot cheaper to buy a programmer than take
the time to buuild one.
-tony