In my own designed 8052 board
I want start the 8052 with EA = 1
to start the micro from internal flash eeprom
( this boot flash eeprom has the code for serial comunication )

I have a RAM in the board that is written like the external RAM
and can be read as external code memory

now after sending my executable code into this RAM through serial port
I want switch EA = 0 and reset the 8052 without cutting power

now my question ;
when I change EA from 1 to 0
does the micro start fetching code from this RAM imediately
or does it start fething code after reset ?