I would like to set a (fuse?) bit to select the external Flash/PEROM as program memory instead of default Flash internal to the AT89C51. Is the BLJB bit the one I want to set? How do I set it?
"This page (http://www.phaedsys.demon.co.uk/chris/8051/atmel.html) says the factory default will force hardware boot address at FC03h." That page does not refer to the device you are using - don't confuse the parts prefixed with 'T' and those prefixed with 'AT'.