hi i want to interface a matrix keyboard with 8051 i want to input a 40*40 bit array of 1 and 0's and i want to store it in the memory of the microcontroller could anyone please help me with the code or any suggestions

Sure, Huzefa!

Looks as if you want to perform a quantum statistical experiment to verify the chromatical aberation states of bose-einstein-partition, right? But believe me, you will need a quantum flux compensator to do this! And take care of exclusion principle! Without increasing correlation by the help of quantum flux compensator, states of partition become superfluous and triggering of your 40x40bit array (which is called 'matrix' by the way) will be a real challenge.
If you could get a common trigger signal for all these 40 lines, maybe derived from additional coincidence sensors, cross-looped in the well known way, then, of course, you could also be succesful without this quantum flux compensator.
But in any case the use of 'level-5-dam-up-field' is obligatory and provide enough stack space!!


Kai