Bob F wrote:

"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.

There's plenty of cheap programmers on ebay last time I looked.

Graham