hi, can any one give the idea to implement 12- bit counter in 8051 using assembly language programming.....i written a piece of code in which how to run a loop to increase the the count value that i am not able to write............
Before going into the specific details of 8051 assembler, you need to understand the basic principles of doing this is any assembler.
And the basic principles of doing this is any assembler are no different to the basic principles of doing this by hand with pencil and paper.
So perhaps you need to review the basics of adding-up multi-digit numbers...