Someone had posted anote earlier in the week with regard
to the 12C508 being UNAVAILABLE.

I called our local rep here in Rochester NY, and our local
supplier, Future Electronics.  The local reps have the
Microchip guys in today, and they say it ain't so.  I got
a return call from Future Electronics, and they claim to
have 235K (pieces) of 508s in stock.

So these chips are VERY AVAILABLE here in western upstate ny.

Regards.
- Gary M. Diana, Sr.
  Embedded Research
  http://www.vivanet.com/~gmdsr