Re: ZIP logic gates

[JJeffries@psu.edu (Jason Jeffries)]

In article <3sb39c$s9s@asia.lm.com>
mportune@telerama.lm.com (Matt Portune) writes:

> Now I'm mad.  I just got my 74HC00 & 74HC02 gates from digi-key today, 
> and when I put them on my Zip, the GS won't even boot.  There's garbage 
> all over the screen.  I don't get it!  The part number is right from the 
> FAQ...  
>  
> MM74HC00N-ND    &    MM74HC02N-ND
>  
> What is going on?  Why can't I use these things?

Did you socket them? If not, it's a good idea. If you did, try
switching back to the old ones without changing anything else. If it
works that way, try swapping one chip at a time--one of the new ones
might be faulty. Also, make sure that they are oriented the right way,
and don't rely on the printing, make sure the dot is in the right
place.

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