Hello .....

I would like some help from the forum members on this one :

a)I need to store 4 bytes of data in the 89c51rd2xx in the non volatile ISP flash.
As per the data sheet Philips have some new functions :
Program Data Block / Read Data Block which should probably be able to do the same.Would it be possible to do the same with these functions?
b) Since this task is to be carried out by the running application program , it has to be done without pulling PSEN low by jumpers etc. Would this be possible ?

I would appreciate any feedback on how to incorporate my requirement.

Regards
Thomas