I was thinking of the Atmel T89C51RD2. It has many more ways to fix that problem than the philips chip does. I personally have never had to fix it with either device. The atmel will allow you to manipulate EA after reset, and also allows alternate access to the boot vector without using the API calls.

Also, it is hard to get the wrong boot vector programmed unless you are trying to do that.

Also, depending on how often it happens, you can throw away $10, and not worry about re-programming it.

I noticed while searching for AN-461 on the philips site, that Philips has a microcontroller forum. It is
http://www.semiconductors.philips.com/mcu/suppo...index.html