"Franc Zabkar" wrote in message
...
On Thu, 4 Dec 2008 19:39:56 -0800, "Bob F" put
finger to keyboard and composed:

I need to get a few 80C51's programmed with a monitor program for my home
control system. I finaly found my backup and it works, but that leaves me with
no backup chip.

Does anyone know where I could get my unprogrammed chips (PLCC) programmed in
the Seattle area? Or, where I can buy them with programming included? Or, if
you
have a programmer, and could help me out, that would be perfect.

Do you have an 80C51 CPU or a CPU with a different number but in that
same family? AFAIK, an 80C51 was a mask ROMed version of the 80C31. I
know that later devices used OTPROM or EPROM or flash, but AFAIK they
had distinguishing part numbers, eg 87C51 or 89C51.

You got me. The chip is an Intel 87C51FA-1 which does contain 8K onetime EPROM.
I had labeled the origional as 80C51, and had to dig out my reading glasses to
check the unprogrammed spares. Thanks for catching this.