how to display relative value of an unknown value present in register using asm code

Hi,

i m doin project on flour mill automatuion system. i m using 89s52, i m generating pwm wave using the microcontroller. and i can vary the value of the generated wave, but the problem is i hv to display the value of the reg. on which the pwm is depended on. and not only the reg value, i also have to display the relative msg of the same value. like this i hv 255 msgs.
so i need help on this

thank you, regards

vatsal soni